diff --git a/.cargo/config.toml b/.cargo/config.toml deleted file mode 100644 index b7efcee..0000000 --- a/.cargo/config.toml +++ /dev/null @@ -1,4 +0,0 @@ -# https://github.com/rui314/mold?tab=readme-ov-file#how-to-use -[target.'cfg(target_os = "linux")'] -linker = "clang" -rustflags = ["-C", "link-arg=-fuse-ld=mold"] diff --git a/.envrc b/.envrc deleted file mode 100644 index 9e15f92..0000000 --- a/.envrc +++ /dev/null @@ -1,5 +0,0 @@ -watch_file flake.nix -watch_file flake.lock -watch_dir nix - -use flake diff --git a/.github/assets/demo.png b/.github/assets/demo.png index 137b845..945e489 100644 Binary files a/.github/assets/demo.png and b/.github/assets/demo.png differ diff --git a/.github/dependabot.yml b/.github/dependabot.yml deleted file mode 100644 index a1067c4..0000000 --- a/.github/dependabot.yml +++ /dev/null @@ -1,14 +0,0 @@ -version: 2 -updates: - # Update Cargo deps - - package-ecosystem: cargo - directory: "/" - schedule: - interval: "weekly" - - # Update used workflows - - package-ecosystem: github-actions - directory: "/" - schedule: - interval: daily - diff --git a/.github/workflows/hotpath-comment.yml b/.github/workflows/hotpath-comment.yml deleted file mode 100644 index a5ff678..0000000 --- a/.github/workflows/hotpath-comment.yml +++ /dev/null @@ -1,62 +0,0 @@ -name: hotpath-comment - -on: - workflow_run: - workflows: ["hotpath-profile"] - types: - - completed - -permissions: - contents: read - pull-requests: write - -jobs: - comment: - runs-on: ubuntu-latest - if: ${{ github.event.workflow_run.conclusion == 'success' }} - - steps: - - name: Checkout - uses: actions/checkout@v6 - - - name: Download profiling results - uses: actions/download-artifact@v7 - with: - name: hotpath-results - path: /tmp/ - github-token: ${{ secrets.GITHUB_TOKEN }} - run-id: ${{ github.event.workflow_run.id }} - - - name: Setup Rust - uses: actions-rust-lang/setup-rust-toolchain@v1 - - - name: Install hotpath CLI - run: cargo install hotpath - - - name: Post timing comparison comment - env: - GH_TOKEN: ${{ github.token }} - run: | - set -euo pipefail - HEAD_METRICS=$(cat /tmp/head_timing.json) - BASE_METRICS=$(cat /tmp/base_timing.json) - PR_NUMBER=$(cat /tmp/pr_number.txt) - hotpath profile-pr \ - --head-metrics "$HEAD_METRICS" \ - --base-metrics "$BASE_METRICS" \ - --github-token "$GH_TOKEN" \ - --pr-number "$PR_NUMBER" - - - name: Post allocation comparison comment - env: - GH_TOKEN: ${{ github.token }} - run: | - set -euo pipefail - HEAD_METRICS=$(cat /tmp/head_alloc.json) - BASE_METRICS=$(cat /tmp/base_alloc.json) - PR_NUMBER=$(cat /tmp/pr_number.txt) - hotpath profile-pr \ - --head-metrics "$HEAD_METRICS" \ - --base-metrics "$BASE_METRICS" \ - --github-token "$GH_TOKEN" \ - --pr-number "$PR_NUMBER" diff --git a/.github/workflows/hotpath-profile.yml b/.github/workflows/hotpath-profile.yml deleted file mode 100644 index f79b668..0000000 --- a/.github/workflows/hotpath-profile.yml +++ /dev/null @@ -1,65 +0,0 @@ -name: hotpath-profile - -on: - pull_request: - branches: [ "main" ] - -env: - CARGO_TERM_COLOR: always - -jobs: - profile: - runs-on: ubuntu-latest - - steps: - - name: Checkout PR HEAD - uses: actions/checkout@v6 - with: - fetch-depth: 0 - - - name: Setup Rust - uses: actions-rust-lang/setup-rust-toolchain@v1 - - - name: Run timing profiling on HEAD - env: - HOTPATH_JSON: "true" - run: | - cargo run --features='hotpath' 2>&1 | grep '^{"hotpath_profiling_mode"' > /tmp/head_timing.json - - - name: Run allocation profiling on HEAD - env: - HOTPATH_JSON: "true" - run: | - cargo run --features='hotpath,hotpath-alloc' 2>&1 | grep '^{"hotpath_profiling_mode"' > /tmp/head_alloc.json - - - name: Checkout base branch - run: | - git checkout ${{ github.event.pull_request.base.sha }} - - - name: Run timing profiling on base - env: - HOTPATH_JSON: "true" - run: | - cargo run --features='hotpath' 2>&1 | grep '^{"hotpath_profiling_mode"' > /tmp/base_timing.json || echo '{}' > /tmp/base_timing.json - - - name: Run allocation profiling on base - env: - HOTPATH_JSON: "true" - run: | - cargo run --features='hotpath,hotpath-alloc' 2>&1 | grep '^{"hotpath_profiling_mode"' > /tmp/base_alloc.json || echo '{}' > /tmp/base_alloc.json - - - name: Save PR number - run: | - echo '${{ github.event.pull_request.number }}' > /tmp/pr_number.txt - - - name: Upload profiling results - uses: actions/upload-artifact@v6 - with: - name: hotpath-results - path: | - /tmp/head_timing.json - /tmp/head_alloc.json - /tmp/base_timing.json - /tmp/base_alloc.json - /tmp/pr_number.txt - retention-days: 1 diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml index 5f435fb..e87e1da 100644 --- a/.github/workflows/rust.yml +++ b/.github/workflows/rust.yml @@ -10,45 +10,12 @@ env: CARGO_TERM_COLOR: always jobs: - test: - name: Test on ${{ matrix.target }} - runs-on: ${{ matrix.os }} - strategy: - fail-fast: false - matrix: - include: - - os: ubuntu-latest - target: x86_64-unknown-linux-gnu - - os: ubuntu-latest - target: aarch64-unknown-linux-gnu + build: + + runs-on: ubuntu-latest steps: - name: "Checkout" - uses: actions/checkout@v6 - - - name: "Setup Rust toolchain" - uses: actions-rust-lang/setup-rust-toolchain@v1 - with: - target: ${{ matrix.target }} - - - name: "Install cross-compilation tools" - if: matrix.target == 'aarch64-unknown-linux-gnu' - run: | - sudo apt-get update - sudo apt-get install -y gcc-aarch64-linux-gnu - - - name: "Configure linker for aarch64" - if: matrix.target == 'aarch64-unknown-linux-gnu' - run: | - mkdir -p .cargo - cat >> .cargo/config.toml << EOF - [target.aarch64-unknown-linux-gnu] - linker = "aarch64-linux-gnu-gcc" - EOF - - - name: "Build" - run: cargo build --verbose --target ${{ matrix.target }} - - - name: "Run tests" - if: matrix.target == 'x86_64-unknown-linux-gnu' - run: cargo test --verbose --target ${{ matrix.target }} + uses: actions/checkout@v4 + - name: "Build with Cargo" + run: cargo build --verbose diff --git a/.gitignore b/.gitignore index 8799178..8ea0ee8 100644 --- a/.gitignore +++ b/.gitignore @@ -1,3 +1,2 @@ /target result* -/.direnv diff --git a/.rustfmt.toml b/.rustfmt.toml deleted file mode 100644 index 9d5c77e..0000000 --- a/.rustfmt.toml +++ /dev/null @@ -1,26 +0,0 @@ -condense_wildcard_suffixes = true -doc_comment_code_block_width = 80 -edition = "2024" # Keep in sync with Cargo.toml. -enum_discrim_align_threshold = 60 -force_explicit_abi = false -force_multiline_blocks = true -format_code_in_doc_comments = true -format_macro_matchers = true -format_strings = true -group_imports = "StdExternalCrate" -hex_literal_case = "Upper" -imports_granularity = "Crate" -imports_layout = "HorizontalVertical" -inline_attribute_width = 60 -match_block_trailing_comma = true -max_width = 80 -newline_style = "Unix" -normalize_comments = true -normalize_doc_attributes = true -overflow_delimited_expr = true -struct_field_align_threshold = 60 -tab_spaces = 2 -unstable_features = true -use_field_init_shorthand = true -use_try_shorthand = true -wrap_comments = true diff --git a/.taplo.toml b/.taplo.toml deleted file mode 100644 index 5a6456b..0000000 --- a/.taplo.toml +++ /dev/null @@ -1,13 +0,0 @@ -[formatting] -align_entries = true -column_width = 100 -compact_arrays = false -reorder_inline_tables = true -reorder_keys = true - 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-[[package]] -name = "windows_x86_64_msvc" -version = "0.52.6" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec" +checksum = "719b953e2095829ee67db738b3bfa9fa368c94900df327b3f07fe6e794d2fe1f" diff --git a/Cargo.toml b/Cargo.toml index f6ddf6f..9682a7d 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -1,68 +1,24 @@ [package] -name = "microfetch" -version = "0.4.12" -edition = "2024" - -[lib] -name = "microfetch_lib" -path = "src/lib.rs" - -[[bin]] name = "microfetch" -path = "src/main.rs" +version = "0.3.3" +edition = "2021" [dependencies] -hotpath = { optional = true, version = "0.9.0" } -libc = "0.2.178" - -[dev-dependencies] -criterion = "0.8.1" - -[features] -hotpath = [ "dep:hotpath", "hotpath/hotpath" ] -hotpath-alloc = [ "hotpath/hotpath-alloc" ] -hotpath-off = [ "hotpath/hotpath-off" ] - -[[bench]] -harness = false -name = "benchmark" +nix = {version = "0.29", features = ["fs", "hostname"]} +color-eyre = { version = "0.6", default-features = false } [profile.dev] -opt-level = 1 +opt-level = 3 [profile.release] +strip = true +opt-level = "z" +lto = true codegen-units = 1 -lto = true -opt-level = "s" -panic = "abort" -strip = true +panic = "abort" [profile.profiler] -debug = true -inherits = "release" +inherits = "release" +debug = true split-debuginfo = "unpacked" -strip = "none" - -[lints.clippy] -complexity = { level = "warn", priority = -1 } -nursery = { level = "warn", priority = -1 } -pedantic = { level = "warn", priority = -1 } -perf = { level = "warn", priority = -1 } -style = { level = "warn", priority = -1 } - -# The lint groups above enable some less-than-desirable rules, we should manually -# enable those to keep our sanity. -absolute_paths = "allow" -arbitrary_source_item_ordering = "allow" -implicit_return = "allow" -missing_docs_in_private_items = "allow" -non_ascii_literal = "allow" -pattern_type_mismatch = "allow" -print_stdout = "allow" -question_mark_used = "allow" -similar_names = "allow" -single_call_fn = "allow" -std_instead_of_core = "allow" -too_long_first_doc_paragraph = "allow" -too_many_lines = "allow" -unused_trait_names = "allow" +strip = "none" diff --git a/README.md b/README.md index 8f59640..55f928c 100644 --- a/README.md +++ b/README.md @@ -1,45 +1,17 @@ - +# Microfetch -
- https://deps.rs/repo/github/notashelf/microfetch - stars -
+A stupidly simple fetch tool, written in Rust. Runs in a fraction of a second, +displays most nonsense people on r/unixporn care about. Aims to replace +fastfetch on my system, but probably not on yours. Though you are more than +welcome to use it on your system: it's fast. -
-

Microfetch

-

Microscopic fetch tool in Rust, for NixOS systems, with special emphasis on speed

-
- Synopsis
- Features | Motivation
| Benchmarks
- Installation -
-
- -## Synopsis - -[fastfetch]: https://github.com/fastfetch-cli/fastfetch - -Stupidly small and simple, laughably fast and pretty fetch tool. Written in Rust -for speed and ease of maintainability. Runs in a _fraction of a millisecond_ and -displays _most_ of the nonsense you'd see posted on r/unixporn or other internet -communities. Aims to replace [fastfetch] on my personal system, but -[probably not yours](#customizing). Though, you are more than welcome to use it -on your system: it is pretty _[fast](#benchmarks)_... - -

- latest demo -

+![Demo](.github/assets/demo.png) ## Features - Fast - Really fast - Minimal dependencies -- Tiny binary (~370kb [^1]) - Actually really fast - Cool NixOS logo (other, inferior, distros are not supported) - Reliable detection of following info: @@ -48,155 +20,25 @@ on your system: it is pretty _[fast](#benchmarks)_... - Name - Version - Architecture - - Current shell (from `$SHELL`, trimmed if store path) - - Current Desktop (DE/WM/Compositor and display backend) + - Current shell (from $SHELL) + - WM/Compositor and display backend - Memory Usage/Total Memory - Storage Usage/Total Storage (for `/` only) - Shell Colors - Did I mention fast? -- Respects [`NO_COLOR` spec](https://no-color.org/) - -[^1]: With the Mold linker, which is enabled by default in the Flake package, - the binary size is roughly 350kb. That's nearly 20kb reduction in size :) - -## Motivation - -[Rube-Goldmark Machine]: https://en.wikipedia.org/wiki/Rube_Goldberg_machine - -Fastfetch, as its name _probably_ already hinted, is a very fast fetch tool -written in C. I used to use Fastfetch on my systems, but I eventually came to -the realization that I am _not interested in any of its additional features_. I -don't use Sixel, I don't change my configuration more than maybe once a year and -I don't even display most of the fields that it does. Sure the configurability -is nice and I can configure the defaults that I do not like but how often do I -really do that? - -Since I already enjoy programming challenges, and don't use a fetch program that -often, I eventually came to try and answer the question _how fast can I make my -fetch script?_ It is an _even faster_ fetch tool that I would've written in Bash -and put in my `~/.bashrc` but is _actually_ incredibly fast because it opts out -of all the customization options provided by tools such as Fastfetch. Since -Fetch scripts are kind of a coming-of-age ritual for most Linux users, I've -decided to use it on my system. You also might be interested if you like the -defaults and like speed. - -Ultimately, it's a small, opinionated binary with a nice size that doesn't -bother me, and incredible speed. Customization? No thank you. I cannot -re-iterate it enough, Microfetch is _annoyingly fast_. It does not, however, -solve a technical problem. The "problem" Microfetch solves is entirely -self-imposed. On the matter of _size_, the project is written in Rust, which -comes at the cost of "bloated" dependency trees and the increased build times, -but we make an extended effort to keep the dependencies minimal and build times -managable. The latter is also very easily mitigated with Nix's binary cache -systems. Since Microfetch is already in Nixpkgs, you are recommended to use it -to utilize the binary cache properly. The usage of Rust _is_ nice, however, -since it provides us with incredible tooling and a very powerful language that -allows for Microfetch to be as fast as possible. ~~Sure C could've been used -here as well, but do you think I hate myself?~~ Microfetch now features -handwritten assembly to unsafely optimize some areas. In hindsight you all -should have seen this coming. Is it faster? Yes. - -Also see: [Rube-Goldmark Machine] ## Benchmarks -Below are the benchmarks that I've used to back up my claims of Microfetch's -speed. It is fast, it is _very_ fast and that is the point of its existence. It -_could_ be faster, and it will be. Eventually. +Microfetch's performance is mostly hardware-dependant, however, the overall +trend seems to be < 2ms on any modern (2015 and after) CPU. Below are the +benchmarks with Hyperfine on my desktop system. -At this point in time, the performance may be sometimes influenced by -hardware-specific race conditions or even your kernel configuration. Which means -that Microfetch's speed may (at times) depend on your hardware setup. However, -even with the worst possible hardware I could find in my house, I've achieved a -nice less-than-1ms invocation time. Which is pretty good. While Microfetch -_could_ be made faster, we're in the territory of environmental bottlenecks -given how little Microfetch actually allocates. +| Command | Mean [ms] | Min [ms] | Max [ms] | Relative | +| :-------------------------- | --------: | -------: | -------: | -------: | +| `target/release/microfetch` | 1.3 ± 0.1 | 1.2 | 3.7 | 1.00 | -Below are the actual benchmarks with Hyperfine measured on my Desktop system. -The benchmarks were performed under medium system load, and may not be the same -on your system. Please _also_ note that those benchmarks will not be always kept -up to date, but I will try to update the numbers as I make Microfetch faster. - -| Command | Mean [µs] | Min [µs] | Max [µs] | Relative | Written by raf? | -| :----------- | ----------------: | -------: | -------: | -------------: | --------------: | -| `microfetch` | 604.4 ± 64.2 | 516.0 | 1184.6 | 1.00 | Yes | -| `fastfetch` | 140836.6 ± 1258.6 | 139204.7 | 143299.4 | 233.00 ± 24.82 | No | -| `pfetch` | 177036.6 ± 1614.3 | 174199.3 | 180830.2 | 292.89 ± 31.20 | No | -| `neofetch` | 406309.9 ± 1810.0 | 402757.3 | 409526.3 | 672.20 ± 71.40 | No | -| `nitch` | 127743.7 ± 1391.7 | 123933.5 | 130451.2 | 211.34 ± 22.55 | No | -| `macchina` | 13603.7 ± 339.7 | 12642.9 | 14701.4 | 22.51 ± 2.45 | No | - -The point stands that Microfetch is significantly faster than every other fetch -tool I have tried. This is to be expected, of course, since Microfetch is -designed _explicitly_ for speed and makes some tradeoffs to achieve it's -signature speed. - -### Benchmarking Individual Functions - -[Criterion.rs]: https://github.com/bheisler/criterion.rs -[Getting Started Guide]: https://bheisler.github.io/criterion.rs/book/getting_started.html - -To benchmark individual functions, [Criterion.rs] is used. See Criterion's -[Getting Started Guide] for details or just run `cargo bench` to benchmark all -features of Microfetch. - -### Profiling Allocations and Timing - -[Hotpath]: https://github.com/pawurb/hotpath - -Microfetch uses [Hotpath] for profiling function execution timing and heap -allocations. This helps identify performance bottlenecks and track optimization -progress. It is so effective that thanks to Hotpath, Microfetch has seen a 60% -reduction in the number of allocations. - -To profile timing: - -```bash -HOTPATH_JSON=true cargo run --features=hotpath -``` - -To profile allocations: - -```bash -HOTPATH_JSON=true cargo run --features=hotpath,hotpath-alloc -``` - -The JSON output can be analyzed with the `hotpath` CLI tool for detailed -performance metrics. On pull requests, GitHub Actions automatically profiles -both timing and allocations, posting comparison comments to help catch -performance regressions. - -## Installation - -> [!NOTE] -> You will need a Nerdfonts patched font installed, and for your terminal -> emulator to support said font. Microfetch uses nerdfonts glyphs by default, -> but this can be changed by [patching the program](#customizing). - -Microfetch is packaged in [nixpkgs](https://github.com/nixos/nixpkgs). It can be -installed by adding `pkgs.microfetch` to your `environment.systemPackages`. -Additionally, you can try out Microfetch in a Nix shell. - -```bash -nix shell nixpkgs#microfetch -``` - -Or run it directly with `nix run` - -```bash -nix run nixpkgs#microfetch -``` - -Non-Nix users will have to build Microfetch with `cargo`. It is not published -anywhere but I imagine you can use `cargo install --git` to install it from -source. - -```bash -cargo install --git https://github.com/notashelf/microfetch.git -``` - -Microfetch is _currently_ not available anywhere else. Though, does it _really_ -have to be? +On an average configuration, this is roughly 25 times faster than fastfetch and +around 80 times faster than neofetch. Results, as stated above, may vary. ## Customizing @@ -204,31 +46,14 @@ You can't. ### Why? -Customization, of most kinds, are expensive: I could try reading environment -variables, parse command-line arguments or read a configuration file to allow -configuring various fields but those inflate execution time and the resource -consumption by a lot. Since Microfetch is closer to a code golf challenge than a -program that attempts to fill a gap, I have elected not to make this trade. +Customization, of any kind, is expensive: I could try reading environment +variables, parse command-line arguments or read a configuration file but all of +those increment execution time and resource consumption by a lot. ### Really? -[main module]: ./src/main.rs -[discussions tab]: https://github.com/NotAShelf/microfetch/discussions - -To be fair, you _can_ customize Microfetch by, well, patching it. It is -certainly not the easiest way of doing so but if you are planning to change -something in Microfetch, patching is the best way to go. It will also the only -way that does not compromise on speed, unless you patch in bad code. Various -users have adapted Microfetch to their distribution by patching the -[main module] and inserting the logo of their choice. This is also the best way -to go if you plan to make small changes. If your changes are not small, you -might want to look for a program that is designed to be customizable; Microfetch -is built for maximum performance. - -The Nix package allows passing patches in a streamlined manner by passing -`.overrideAttrs` to the derivation. You can apply your patches in `patches` and -share your derivations with people. Feel free to use the [discussions tab] to -share your own variants of Microfetch! +To be fair, you _can_ customize Microfetch by... Well, patching it. It's not the +best way per se, but it will be the only way that does not compromise on speed. ## Contributing @@ -237,45 +62,7 @@ them altogether, as you might have a really good idea worth discussing but as a general rule of thumb consider talking to me before creating a feature PR. Contributions that help improve performance in specific areas of Microfetch are -welcome. Though, prepare to be bombarded with questions if your changes are -large. - -### Hacking - -A Nix flake is provided. You may use `nix develop` to get started. Direnv users -may instead run `direnv allow` to get a complete environment with shell -integration. - -Non-Nix user will need `cargo`, `clang` and `mold` installed on their system to -build Microfetch. As Mold seems to yield _slightly_ better results than the -default linker, it has been set as the default in `.cargo/config.toml` for -x86-64 Linux. You may override those defaults using the `RUSTFLAGS` environment -variable. For example: - -```sh -# Use ld instead of Mold -$ RUSTFLAGS="-C linker=/path/to/ld.lld" cargo build -``` - -## Thanks - -Huge thanks to everyone who took the time to make pull requests or nag me in -person about current issues. To list a few, special thanks to: - -- [@Nydragon](https://github.com/Nydragon) - For packaging Microfetch in Nixpkgs -- [@ErrorNoInternet](https://github.com/ErrorNoInternet) - Performance - improvements and code assistance -- [@SoraTenshi](https://github.com/SoraTenshi) - General tips and code - improvements -- [@bloxx12](https://github.com/bloxx12) - Performance improvements and - benchmarking plots -- [@sioodmy](https://github.com/sioodmy) - Being cute -- [@mewoocat](https://github.com/mewoocat) - The awesome NixOS logo ASCII used - in Microfetch -- [@uzaaft](https://github.com/uzaaft) - Helping me going faster - -Additionally a big thank you to everyone who used, talked about or criticized -Microfetch. I might have missed your name here, but you have my thanks. +welcome. Though, prepare to be bombarded with questions. ## License diff --git a/benches/benchmark.rs b/benches/benchmark.rs deleted file mode 100644 index 8d62082..0000000 --- a/benches/benchmark.rs +++ /dev/null @@ -1,33 +0,0 @@ -use criterion::{Criterion, criterion_group, criterion_main}; -use microfetch_lib::{ - UtsName, - colors::print_dots, - desktop::get_desktop_info, - release::{get_os_pretty_name, get_system_info}, - system::{ - get_memory_usage, - get_root_disk_usage, - get_shell, - get_username_and_hostname, - }, - uptime::get_current, -}; - -fn main_benchmark(c: &mut Criterion) { - let utsname = UtsName::uname().expect("Failed to get uname"); - c.bench_function("user_info", |b| { - b.iter(|| get_username_and_hostname(&utsname)); - }); - c.bench_function("os_name", |b| b.iter(get_os_pretty_name)); - c.bench_function("kernel_version", |b| b.iter(|| get_system_info(&utsname))); - c.bench_function("shell", |b| b.iter(get_shell)); - - c.bench_function("desktop", |b| b.iter(get_desktop_info)); - c.bench_function("uptime", |b| b.iter(get_current)); - c.bench_function("memory_usage", |b| b.iter(get_memory_usage)); - c.bench_function("storage", |b| b.iter(get_root_disk_usage)); - c.bench_function("colors", |b| b.iter(print_dots)); -} - -criterion_group!(benches, main_benchmark); -criterion_main!(benches); diff --git a/flake.lock b/flake.lock index 452a532..77bd438 100644 --- a/flake.lock +++ b/flake.lock @@ -2,19 +2,15 @@ "nodes": { "nixpkgs": { "locked": { - "lastModified": 1743359643, - "narHash": "sha256-RkyJ9a67s0zEIz4O66TyZOIGh4TFZ4dKHKMgnxZCh2I=", - "lastModified": 1763381801, - "narHash": "sha256-325fR0JmHW7B74/gHPv/S9w1Rfj/M2HniwQFUwdrZ9k=", + "lastModified": 1722719969, + "narHash": "sha256-E47qbT/mRtBCSZra+9S9208sp/QnNeOAq7EhHX+eMNE=", "owner": "NixOS", "repo": "nixpkgs", - "rev": "ca77b4bc80e558ce59f2712fdb276f90c0ee309a", - "rev": "46931757ea8bdbba25c076697f8e73b8dc39fef5", + "rev": "83a364ced9d5b8a6bdac897bbef6b91e70777b97", "type": "github" }, "original": { "owner": "NixOS", - "ref": "nixos-unstable", "repo": "nixpkgs", "type": "github" } diff --git a/flake.nix b/flake.nix index 90978a2..4ee4f5f 100644 --- a/flake.nix +++ b/flake.nix @@ -1,6 +1,6 @@ { description = "A microscopic fetch script in Rust, for NixOS systems"; - inputs.nixpkgs.url = "github:NixOS/nixpkgs?ref=nixos-unstable"; + inputs.nixpkgs.url = "github:NixOS/nixpkgs"; outputs = { self, @@ -10,16 +10,8 @@ forEachSystem = nixpkgs.lib.genAttrs systems; pkgsForEach = nixpkgs.legacyPackages; in { - packages = forEachSystem (system: let - pkgs = pkgsForEach.${system}; - in { - default = self.packages.${system}.microfetch; - microfetch = pkgs.callPackage ./nix/package.nix {}; - microfetch-mold = pkgs.callPackage ./nix/package.nix {useMold = true;}; - }); - - devShells = forEachSystem (system: { - default = pkgsForEach.${system}.callPackage ./nix/shell.nix {}; + packages = forEachSystem (system: { + default = pkgsForEach.${system}.callPackage ./nix/package.nix {}; }); }; } diff --git a/nix/package.nix b/nix/package.nix index 052f576..1a7dde3 100644 --- a/nix/package.nix +++ b/nix/package.nix @@ -1,53 +1,30 @@ { lib, - stdenv, - stdenvAdapters, rustPlatform, + stdenvAdapters, llvm, - useMold ? stdenv.isLinux && !stdenv.hostPlatform.isAarch, }: let toml = (lib.importTOML ../Cargo.toml).package; pname = toml.name; inherit (toml) version; - - # Select stdenv based on useMold flag - stdenv = - if useMold - then stdenvAdapters.useMoldLinker llvm.stdenv - else llvm.stdenv; in - rustPlatform.buildRustPackage.override {inherit stdenv;} { + rustPlatform.buildRustPackage.override {stdenv = stdenvAdapters.useMoldLinker llvm.stdenv;} { + RUSTFLAGS = "-C link-arg=-fuse-ld=mold"; + inherit pname version; - src = let - fs = lib.fileset; - s = ../.; - in - fs.toSource { - root = s; - fileset = fs.unions [ - (fs.fileFilter (file: builtins.any file.hasExt ["rs"]) (s + /src)) - (s + /Cargo.lock) - (s + /Cargo.toml) - (s + /benches) - ]; - }; - cargoLock.lockFile = ../Cargo.lock; - enableParallelBuilding = true; - buildNoDefaultFeatures = true; - doCheck = false; - - # Only set RUSTFLAGS for mold if useMold is enabled - env = lib.optionalAttrs useMold { - CARGO_LINKER = "clang"; - RUSTFLAGS = "-C link-arg=-fuse-ld=mold"; + src = builtins.path { + name = "${pname}-${version}"; + path = lib.sources.cleanSource ../.; }; + cargoLock.lockFile = ../Cargo.lock; + meta = { - description = "Microscopic fetch script in Rust, for NixOS systems"; + description = "A microscopic fetch script in Rust, for NixOS systems"; homepage = "https://github.com/NotAShelf/microfetch"; license = lib.licenses.gpl3Only; - maintainers = [lib.maintainers.NotAShelf]; + maintainers = with lib.maintainers; [NotAShelf]; mainProgram = "microfetch"; }; } diff --git a/nix/shell.nix b/nix/shell.nix deleted file mode 100644 index ae65e10..0000000 --- a/nix/shell.nix +++ /dev/null @@ -1,32 +0,0 @@ -{ - mkShell, - cargo, - rustc, - mold, - clang, - rust-analyzer-unwrapped, - rustfmt, - clippy, - taplo, - rustPlatform, - gnuplot, -}: -mkShell { - name = "microfetch"; - strictDeps = true; - nativeBuildInputs = [ - cargo - rustc - mold - clang - - rust-analyzer-unwrapped - (rustfmt.override {asNightly = true;}) - clippy - taplo - - gnuplot # for Criterion.rs plots - ]; - - env.RUST_SRC_PATH = "${rustPlatform.rustLibSrc}"; -} diff --git a/src/colors.rs b/src/colors.rs index 7c65944..1aa8096 100644 --- a/src/colors.rs +++ b/src/colors.rs @@ -1,81 +1,13 @@ -use std::sync::LazyLock; +pub const RESET: &str = "\x1b[0m"; +pub const BLUE: &str = "\x1b[34m"; +pub const CYAN: &str = "\x1b[36m"; +pub const GREEN: &str = "\x1b[32m"; +pub const YELLOW: &str = "\x1b[33m"; +pub const RED: &str = "\x1b[31m"; +pub const MAGENTA: &str = "\x1b[35m"; -pub struct Colors { - pub reset: &'static str, - pub blue: &'static str, - pub cyan: &'static str, - pub green: &'static str, - pub yellow: &'static str, - pub red: &'static str, - pub magenta: &'static str, -} - -impl Colors { - const fn new(is_no_color: bool) -> Self { - if is_no_color { - Self { - reset: "", - blue: "", - cyan: "", - green: "", - yellow: "", - red: "", - magenta: "", - } - } else { - Self { - reset: "\x1b[0m", - blue: "\x1b[34m", - cyan: "\x1b[36m", - green: "\x1b[32m", - yellow: "\x1b[33m", - red: "\x1b[31m", - magenta: "\x1b[35m", - } - } - } -} - -pub static COLORS: LazyLock = LazyLock::new(|| { - const NO_COLOR: *const libc::c_char = c"NO_COLOR".as_ptr(); - let is_no_color = unsafe { !libc::getenv(NO_COLOR).is_null() }; - Colors::new(is_no_color) -}); - -#[must_use] -#[cfg_attr(feature = "hotpath", hotpath::measure)] -pub fn print_dots() -> String { - // Pre-calculate capacity: 6 color codes + " " (glyph + 2 spaces) per color - const GLYPH: &str = ""; - let capacity = COLORS.blue.len() - + COLORS.cyan.len() - + COLORS.green.len() - + COLORS.yellow.len() - + COLORS.red.len() - + COLORS.magenta.len() - + COLORS.reset.len() - + (GLYPH.len() + 2) * 6; - - let mut result = String::with_capacity(capacity); - result.push_str(COLORS.blue); - result.push_str(GLYPH); - result.push_str(" "); - result.push_str(COLORS.cyan); - result.push_str(GLYPH); - result.push_str(" "); - result.push_str(COLORS.green); - result.push_str(GLYPH); - result.push_str(" "); - result.push_str(COLORS.yellow); - result.push_str(GLYPH); - result.push_str(" "); - result.push_str(COLORS.red); - result.push_str(GLYPH); - result.push_str(" "); - result.push_str(COLORS.magenta); - result.push_str(GLYPH); - result.push_str(" "); - result.push_str(COLORS.reset); - - result +pub fn print_dots() -> Result { + let colors = format!("{BLUE} {CYAN} {GREEN} {YELLOW} {RED} {MAGENTA} {RESET}"); + + Ok(colors) } diff --git a/src/desktop.rs b/src/desktop.rs index 501e967..9d72325 100644 --- a/src/desktop.rs +++ b/src/desktop.rs @@ -1,42 +1,20 @@ -use std::{ffi::CStr, fmt::Write}; +use color_eyre::Result; +use std::{env, io}; -#[must_use] -#[cfg_attr(feature = "hotpath", hotpath::measure)] -pub fn get_desktop_info() -> String { - // Retrieve the environment variables and handle Result types - let desktop_str = unsafe { - let ptr = libc::getenv(c"XDG_CURRENT_DESKTOP".as_ptr()); - if ptr.is_null() { - "Unknown" - } else { - let s = CStr::from_ptr(ptr).to_str().unwrap_or("Unknown"); - s.strip_prefix("none+").unwrap_or(s) - } - }; +pub fn get_desktop_info() -> Result { + let desktop_env = env::var("XDG_CURRENT_DESKTOP"); + let display_backend = env::var("XDG_SESSION_TYPE"); - let backend_str = unsafe { - let ptr = libc::getenv(c"XDG_SESSION_TYPE".as_ptr()); - if ptr.is_null() { - "Unknown" - } else { - let s = CStr::from_ptr(ptr).to_str().unwrap_or("Unknown"); - if s.is_empty() { "Unknown" } else { s } - } - }; + // Trim "none+" from the start of desktop_env if present + // XXX: This is a workaround for NixOS modules that set XDG_CURRENT_DESKTOP to "none+foo" + // instead of just "foo" + // Use "Unknown" if desktop_env or display_backend is empty + let desktop_env = match desktop_env { + Err(_) => String::from("Unknown"), + Ok(s) => s.trim_start_matches("none+").to_owned(), + }; - // Pre-calculate capacity: desktop_len + " (" + backend_len + ")" - // Capitalize first char needs temporary allocation only if backend exists - let mut result = - String::with_capacity(desktop_str.len() + backend_str.len() + 3); - result.push_str(desktop_str); - result.push_str(" ("); + let display_backend = display_backend.unwrap_or_else(|_| String::from("Unknown")); - // Capitalize first character of backend - if let Some(first_char) = backend_str.chars().next() { - let _ = write!(result, "{}", first_char.to_ascii_uppercase()); - result.push_str(&backend_str[first_char.len_utf8()..]); - } - - result.push(')'); - result + Ok(format!("{desktop_env} ({display_backend})")) } diff --git a/src/lib.rs b/src/lib.rs deleted file mode 100644 index 1e0f9f3..0000000 --- a/src/lib.rs +++ /dev/null @@ -1,46 +0,0 @@ -pub mod colors; -pub mod desktop; -pub mod release; -pub mod syscall; -pub mod system; -pub mod uptime; - -use std::mem::MaybeUninit; - -/// Wrapper for `libc::utsname` with safe accessor methods -pub struct UtsName(libc::utsname); - -impl UtsName { - /// Calls `uname` syscall and returns a `UtsName` wrapper - /// - /// # Errors - /// - /// Returns an error if the `uname` syscall fails - pub fn uname() -> Result { - let mut uts = MaybeUninit::uninit(); - if unsafe { libc::uname(uts.as_mut_ptr()) } != 0 { - return Err(std::io::Error::last_os_error()); - } - Ok(Self(unsafe { uts.assume_init() })) - } - - #[must_use] - pub const fn nodename(&self) -> &std::ffi::CStr { - unsafe { std::ffi::CStr::from_ptr(self.0.nodename.as_ptr()) } - } - - #[must_use] - pub const fn sysname(&self) -> &std::ffi::CStr { - unsafe { std::ffi::CStr::from_ptr(self.0.sysname.as_ptr()) } - } - - #[must_use] - pub const fn release(&self) -> &std::ffi::CStr { - unsafe { std::ffi::CStr::from_ptr(self.0.release.as_ptr()) } - } - - #[must_use] - pub const fn machine(&self) -> &std::ffi::CStr { - unsafe { std::ffi::CStr::from_ptr(self.0.machine.as_ptr()) } - } -} diff --git a/src/main.rs b/src/main.rs index e29d6d1..30fa78a 100644 --- a/src/main.rs +++ b/src/main.rs @@ -1,112 +1,69 @@ mod colors; mod desktop; mod release; -mod syscall; mod system; mod uptime; -use std::io::{self, Cursor, Write}; +use crate::colors::{print_dots, BLUE, CYAN, RESET}; +use crate::desktop::get_desktop_info; +use crate::release::{get_os_pretty_name, get_system_info}; +use crate::system::{get_memory_usage, get_root_disk_usage, get_shell, get_username_and_hostname}; +use crate::uptime::get_current; -pub use microfetch_lib::UtsName; +use color_eyre::Report; +use nix::sys::sysinfo::sysinfo; -use crate::{ - colors::print_dots, - desktop::get_desktop_info, - release::{get_os_pretty_name, get_system_info}, - system::{ - get_memory_usage, - get_root_disk_usage, - get_shell, - get_username_and_hostname, - }, - uptime::get_current, -}; +fn main() -> Result<(), Report> { + color_eyre::install()?; -#[cfg_attr(feature = "hotpath", hotpath::main)] -fn main() -> Result<(), Box> { - if Some("--version") == std::env::args().nth(1).as_deref() { - println!("Microfetch {}", env!("CARGO_PKG_VERSION")); - } else { - let utsname = UtsName::uname()?; - let fields = Fields { - user_info: get_username_and_hostname(&utsname), - os_name: get_os_pretty_name()?, - kernel_version: get_system_info(&utsname), - shell: get_shell(), - desktop: get_desktop_info(), - uptime: get_current()?, - memory_usage: get_memory_usage()?, - storage: get_root_disk_usage()?, - colors: print_dots(), - }; - print_system_info(&fields)?; - } + let user_info = get_username_and_hostname()?; + let os_name = get_os_pretty_name()?; + let kernel_version = get_system_info()?; + let shell = get_shell()?; + let uptime = get_current()?; + let window_manager = get_desktop_info()?; + let sys_info = sysinfo()?; + let memory_usage = get_memory_usage(sys_info); + let storage = get_root_disk_usage()?; + let colors = print_dots()?; - Ok(()) + print_system_info( + &user_info, + &os_name, + &kernel_version, + &shell, + &uptime, + &window_manager, + &memory_usage, + &storage, + &colors, + ); + + Ok(()) } -// Struct to hold all the fields we need in order to print the fetch. This -// helps avoid Clippy warnings about argument count, and makes it slightly -// easier to pass data around. Though, it is not like we really need to. -struct Fields { - user_info: String, - os_name: String, - kernel_version: String, - shell: String, - uptime: String, - desktop: String, - memory_usage: String, - storage: String, - colors: String, -} - -#[cfg_attr(feature = "hotpath", hotpath::measure)] fn print_system_info( - fields: &Fields, -) -> Result<(), Box> { - use crate::colors::COLORS; - - let Fields { - user_info, - os_name, - kernel_version, - shell, - uptime, - desktop, - memory_usage, - storage, - colors, - } = fields; - - let cyan = COLORS.cyan; - let blue = COLORS.blue; - let reset = COLORS.reset; - - let mut buf = [0u8; 2048]; - let mut cursor = Cursor::new(&mut buf[..]); - - write!( - cursor, + user_info: &str, + os_name: &str, + kernel_version: &str, + shell: &str, + uptime: &str, + window_manager: &str, + memory_usage: &str, + storage: &str, + colors: &str, +) { + println!( + " + {CYAN} ▟█▖ {BLUE}▝█▙ ▗█▛ {user_info} ~{RESET} + {CYAN} ▗▄▄▟██▄▄▄▄▄{BLUE}▝█▙█▛ {CYAN}▖ {CYAN} {BLUE}System{RESET}  {os_name} + {CYAN} ▀▀▀▀▀▀▀▀▀▀▀▘{BLUE}▝██ {CYAN}▟█▖ {CYAN} {BLUE}Kernel{RESET}  {kernel_version} + {BLUE} ▟█▛ {BLUE}▝█▘{CYAN}▟█▛ {CYAN} {BLUE}Shell{RESET}  {shell} + {BLUE}▟█████▛ {CYAN}▟█████▛ {CYAN} {BLUE}Uptime{RESET}  {uptime} + {BLUE} ▟█▛{CYAN}▗█▖ {CYAN}▟█▛ {CYAN} {BLUE}WM{RESET}  {window_manager} + {BLUE} ▝█▛ {CYAN}██▖{BLUE}▗▄▄▄▄▄▄▄▄▄▄▄ {CYAN}󰍛 {BLUE}Memory{RESET}  {memory_usage} + {BLUE} ▝ {CYAN}▟█▜█▖{BLUE}▀▀▀▀▀██▛▀▀▘ {CYAN}󱥎 {BLUE}Storage (/){RESET}  {storage} + {CYAN} ▟█▘ ▜█▖ {BLUE}▝█▛ {CYAN} {BLUE}Colors{RESET}  {colors} " - {cyan} ▟█▖ {blue}▝█▙ ▗█▛ {user_info} ~{reset} - {cyan} ▗▄▄▟██▄▄▄▄▄{blue}▝█▙█▛ {cyan}▖ {cyan} {blue}System{reset}  {os_name} - {cyan} ▀▀▀▀▀▀▀▀▀▀▀▘{blue}▝██ {cyan}▟█▖ {cyan} {blue}Kernel{reset}  {kernel_version} - {blue} ▟█▛ {blue}▝█▘{cyan}▟█▛ {cyan} {blue}Shell{reset}  {shell} - {blue}▟█████▛ {cyan}▟█████▛ {cyan} {blue}Uptime{reset}  {uptime} - {blue} ▟█▛{cyan}▗█▖ {cyan}▟█▛ {cyan} {blue}Desktop{reset}  {desktop} - {blue} ▝█▛ {cyan}██▖{blue}▗▄▄▄▄▄▄▄▄▄▄▄ {cyan}󰍛 {blue}Memory{reset}  {memory_usage} - {blue} ▝ {cyan}▟█▜█▖{blue}▀▀▀▀▀██▛▀▀▘ {cyan}󱥎 {blue}Storage (/){reset}  {storage} - {cyan} ▟█▘ ▜█▖ {blue}▝█▛ {cyan} {blue}Colors{reset}  {colors}\n\n" - )?; - - let len = cursor.position() as usize; - // Direct syscall to avoid stdout buffering allocation - let written = unsafe { libc::write(libc::STDOUT_FILENO, buf.as_ptr().cast(), len) }; - if written < 0 { - return Err(io::Error::last_os_error().into()); - } - if written as usize != len { - return Err(io::Error::new(io::ErrorKind::WriteZero, "partial write to stdout").into()); - } - Ok(()) + ); } diff --git a/src/release.rs b/src/release.rs index 8d3232e..25f5640 100644 --- a/src/release.rs +++ b/src/release.rs @@ -1,69 +1,42 @@ -use std::{fmt::Write as _, io}; +use color_eyre::Result; +use std::fs::{self, read_to_string}; +use std::io; -use crate::{UtsName, syscall::read_file_fast}; - -#[must_use] -#[cfg_attr(feature = "hotpath", hotpath::measure)] -pub fn get_system_info(utsname: &UtsName) -> String { - let sysname = utsname.sysname().to_str().unwrap_or("Unknown"); - let release = utsname.release().to_str().unwrap_or("Unknown"); - let machine = utsname.machine().to_str().unwrap_or("Unknown"); - - // Pre-allocate capacity: sysname + " " + release + " (" + machine + ")" - let capacity = sysname.len() + 1 + release.len() + 2 + machine.len() + 1; - let mut result = String::with_capacity(capacity); - - write!(result, "{sysname} {release} ({machine})").unwrap(); - result -} - -/// Gets the pretty name of the OS from `/etc/os-release`. -/// -/// # Errors -/// -/// Returns an error if `/etc/os-release` cannot be read. -#[cfg_attr(feature = "hotpath", hotpath::measure)] -pub fn get_os_pretty_name() -> Result { - // Fast byte-level scanning for PRETTY_NAME= - const PREFIX: &[u8] = b"PRETTY_NAME="; - - let mut buffer = [0u8; 1024]; - - // Use fast syscall-based file reading - let bytes_read = read_file_fast("/etc/os-release", &mut buffer)?; - let content = &buffer[..bytes_read]; - - let mut offset = 0; - - while offset < content.len() { - let remaining = &content[offset..]; - - // Find newline or end - let line_end = remaining - .iter() - .position(|&b| b == b'\n') - .unwrap_or(remaining.len()); - let line = &remaining[..line_end]; - - if line.starts_with(PREFIX) { - let value = &line[PREFIX.len()..]; - - // Strip quotes if present - let trimmed = if value.len() >= 2 - && value[0] == b'"' - && value[value.len() - 1] == b'"' - { - &value[1..value.len() - 1] - } else { - value - }; - - // Convert to String - should be valid UTF-8 - return Ok(String::from_utf8_lossy(trimmed).into_owned()); +// Try to detect OS type as accurately as possible and without depending on uname. +// /etc/os-release should generally imply Linux, and /etc/bsd-release would imply BSD system. +fn detect_os() -> Result<&'static str, io::Error> { + if fs::metadata("/etc/os-release").is_ok() || fs::metadata("/usr/lib/os-release").is_ok() { + Ok("Linux") + } else if fs::metadata("/etc/rc.conf").is_ok() || fs::metadata("/etc/bsd-release").is_ok() { + Ok("BSD") + } else { + Ok("Unknown") } - - offset += line_end + 1; - } - - Ok("Unknown".to_owned()) +} + +pub fn get_system_info() -> Result { + let system = detect_os()?; + + let kernel_release = read_to_string("/proc/sys/kernel/osrelease")?; + let kernel_release = kernel_release.trim(); + + let architecture = read_to_string("/proc/sys/kernel/arch")?; + let architecture = architecture.trim(); + + let result = format!("{system} {kernel_release} ({architecture})"); + Ok(result) +} + +pub fn get_os_pretty_name() -> Result { + let os_release_content = read_to_string("/etc/os-release")?; + let pretty_name = os_release_content + .lines() + .find(|line| line.starts_with("PRETTY_NAME=")) + .map(|line| { + line.trim_start_matches("PRETTY_NAME=") + .trim_matches('"') + .to_string() + }); + + Ok(pretty_name.unwrap_or_else(|| "Unknown".to_string())) } diff --git a/src/syscall.rs b/src/syscall.rs deleted file mode 100644 index 0c8634b..0000000 --- a/src/syscall.rs +++ /dev/null @@ -1,210 +0,0 @@ -//! Incredibly fast syscall wrappers for using inline assembly. Serves the -//! purposes of completely bypassing Rust's standard library in favor of -//! handwritten Assembly. Is this a good idea? No. Is it fast? Yeah, but only -//! marginally. Either way it serves a purpose and I will NOT accept criticism. -//! What do you mean I wasted two whole hours to make the program only 100µs -//! faster? -//! -//! Supports `x86_64` and `aarch64` architectures. Riscv support will be -//! implemented when and ONLY WHEN I can be bothered to work on it. - -use std::io; - -/// Direct syscall to open a file -/// -/// # Returns -/// -/// File descriptor or -1 on error -/// -/// # Safety -/// -/// The caller must ensure: -/// -/// - `path` points to a valid null-terminated C string -/// - The pointer remains valid for the duration of the syscall -#[inline] -#[must_use] -pub unsafe fn sys_open(path: *const u8, flags: i32) -> i32 { - #[cfg(target_arch = "x86_64")] - unsafe { - let fd: i64; - std::arch::asm!( - "syscall", - in("rax") 2i64, // SYS_open - in("rdi") path, - in("rsi") flags, - in("rdx") 0i32, // mode (not used for reading) - lateout("rax") fd, - lateout("rcx") _, - lateout("r11") _, - options(nostack) - ); - #[allow(clippy::cast_possible_truncation)] - { - fd as i32 - } - } - #[cfg(target_arch = "aarch64")] - unsafe { - let fd: i64; - std::arch::asm!( - "svc #0", - in("x8") 56i64, // SYS_openat - in("x0") -100i32, // AT_FDCWD - in("x1") path, - in("x2") flags, - in("x3") 0i32, // mode - lateout("x0") fd, - options(nostack) - ); - #[allow(clippy::cast_possible_truncation)] - { - fd as i32 - } - } - #[cfg(not(any(target_arch = "x86_64", target_arch = "aarch64")))] - { - compile_error!("Unsupported architecture for inline assembly syscalls"); - } -} - -/// Direct syscall to read from a file descriptor -/// -/// # Returns n -/// -/// Number of bytes read or -1 on error -/// -/// # Safety -/// -/// The caller must ensure: -/// - `buf` points to a valid writable buffer of at least `count` bytes -/// - `fd` is a valid open file descriptor -#[inline] -pub unsafe fn sys_read(fd: i32, buf: *mut u8, count: usize) -> isize { - #[cfg(target_arch = "x86_64")] - unsafe { - let ret: i64; - std::arch::asm!( - "syscall", - in("rax") 0i64, // SYS_read - in("rdi") fd, - in("rsi") buf, - in("rdx") count, - lateout("rax") ret, - lateout("rcx") _, - lateout("r11") _, - options(nostack) - ); - #[allow(clippy::cast_possible_truncation)] - { - ret as isize - } - } - #[cfg(target_arch = "aarch64")] - unsafe { - let ret: i64; - std::arch::asm!( - "svc #0", - in("x8") 63i64, // SYS_read - in("x0") fd, - in("x1") buf, - in("x2") count, - lateout("x0") ret, - options(nostack) - ); - #[allow(clippy::cast_possible_truncation)] - { - ret as isize - } - } - #[cfg(not(any(target_arch = "x86_64", target_arch = "aarch64")))] - { - compile_error!("Unsupported architecture for inline assembly syscalls"); - } -} - -/// Direct syscall to close a file descriptor -/// -/// # Safety -/// -/// The caller must ensure `fd` is a valid open file descriptor -#[inline] -#[must_use] -pub unsafe fn sys_close(fd: i32) -> i32 { - #[cfg(target_arch = "x86_64")] - unsafe { - let ret: i64; - std::arch::asm!( - "syscall", - in("rax") 3i64, // SYS_close - in("rdi") fd, - lateout("rax") ret, - lateout("rcx") _, - lateout("r11") _, - options(nostack) - ); - #[allow(clippy::cast_possible_truncation)] - { - ret as i32 - } - } - #[cfg(target_arch = "aarch64")] - unsafe { - let ret: i64; - std::arch::asm!( - "svc #0", - in("x8") 57i64, // SYS_close - in("x0") fd, - lateout("x0") ret, - options(nostack) - ); - #[allow(clippy::cast_possible_truncation)] - { - ret as i32 - } - } - #[cfg(not(any(target_arch = "x86_64", target_arch = "aarch64")))] - { - compile_error!("Unsupported architecture for inline assembly syscalls"); - } -} - -/// Read entire file using direct syscalls. This avoids libc overhead and can be -/// significantly faster for small files. -/// -/// # Errors -/// -/// Returns an error if the file cannot be opened or read -#[inline] -pub fn read_file_fast(path: &str, buffer: &mut [u8]) -> io::Result { - const O_RDONLY: i32 = 0; - - // Use stack-allocated buffer for null-terminated path (max 256 bytes) - let path_bytes = path.as_bytes(); - if path_bytes.len() >= 256 { - return Err(io::Error::new(io::ErrorKind::InvalidInput, "Path too long")); - } - - let mut path_buf = [0u8; 256]; - path_buf[..path_bytes.len()].copy_from_slice(path_bytes); - // XXX: Already zero-terminated since array is initialized to zeros - - unsafe { - let fd = sys_open(path_buf.as_ptr(), O_RDONLY); - if fd < 0 { - return Err(io::Error::last_os_error()); - } - - let bytes_read = sys_read(fd, buffer.as_mut_ptr(), buffer.len()); - let _ = sys_close(fd); - - if bytes_read < 0 { - return Err(io::Error::last_os_error()); - } - - #[allow(clippy::cast_sign_loss)] - { - Ok(bytes_read as usize) - } - } -} diff --git a/src/system.rs b/src/system.rs index ba8fe79..551a833 100644 --- a/src/system.rs +++ b/src/system.rs @@ -1,184 +1,60 @@ -use std::{ffi::CStr, fmt::Write as _, io, mem::MaybeUninit}; +use color_eyre::Result; +use nix::sys::statvfs::statvfs; +use nix::sys::sysinfo::SysInfo; -use crate::{UtsName, colors::COLORS, syscall::read_file_fast}; +use std::env; +use std::io::{self}; -#[must_use] -#[cfg_attr(feature = "hotpath", hotpath::measure)] -pub fn get_username_and_hostname(utsname: &UtsName) -> String { - let username = unsafe { - let ptr = libc::getenv(c"USER".as_ptr()); - if ptr.is_null() { - "unknown_user" - } else { - CStr::from_ptr(ptr).to_str().unwrap_or("unknown_user") - } - }; - let hostname = utsname.nodename().to_str().unwrap_or("unknown_host"); +use crate::colors::{CYAN, GREEN, RED, RESET, YELLOW}; - let capacity = COLORS.yellow.len() - + username.len() - + COLORS.red.len() - + 1 - + COLORS.green.len() - + hostname.len() - + COLORS.reset.len(); - let mut result = String::with_capacity(capacity); +pub fn get_username_and_hostname() -> Result { + let username = env::var("USER").unwrap_or_else(|_| "unknown_user".to_string()); + let hostname = nix::unistd::gethostname()?; + let hostname = hostname.to_string_lossy(); - result.push_str(COLORS.yellow); - result.push_str(username); - result.push_str(COLORS.red); - result.push('@'); - result.push_str(COLORS.green); - result.push_str(hostname); - result.push_str(COLORS.reset); - - result + Ok(format!("{YELLOW}{username}{RED}@{GREEN}{hostname}")) } -#[must_use] -#[cfg_attr(feature = "hotpath", hotpath::measure)] -pub fn get_shell() -> String { - unsafe { - let ptr = libc::getenv(c"SHELL".as_ptr()); - if ptr.is_null() { - return "unknown_shell".into(); - } +pub fn get_shell() -> Result { + let shell_path = env::var("SHELL").unwrap_or_else(|_| "unknown_shell".to_string()); + let shell_name = shell_path.rsplit('/').next().unwrap_or("unknown_shell"); - let bytes = CStr::from_ptr(ptr).to_bytes(); - let start = bytes.iter().rposition(|&b| b == b'/').map_or(0, |i| i + 1); - let name = std::str::from_utf8_unchecked(&bytes[start..]); - name.into() - } + Ok(shell_name.to_string()) } -/// Gets the root disk usage information. -/// -/// # Errors -/// -/// Returns an error if the filesystem information cannot be retrieved. -#[cfg_attr(feature = "hotpath", hotpath::measure)] -#[allow(clippy::cast_precision_loss)] pub fn get_root_disk_usage() -> Result { - let mut vfs = MaybeUninit::uninit(); - let path = b"/\0"; + let vfs = statvfs("/")?; + let block_size = vfs.block_size() as u64; + let total_blocks = vfs.blocks(); + let available_blocks = vfs.blocks_available(); - if unsafe { libc::statvfs(path.as_ptr().cast(), vfs.as_mut_ptr()) } != 0 { - return Err(io::Error::last_os_error()); - } + let total_size = block_size * total_blocks; + let used_size = total_size - (block_size * available_blocks); - let vfs = unsafe { vfs.assume_init() }; - let block_size = vfs.f_bsize; - let total_blocks = vfs.f_blocks; - let available_blocks = vfs.f_bavail; + let total_size = total_size as f64 / (1024.0 * 1024.0 * 1024.0); + let used_size = used_size as f64 / (1024.0 * 1024.0 * 1024.0); + let usage = (used_size as f64 / total_size as f64) * 100.0; - let total_size = block_size * total_blocks; - let used_size = total_size - (block_size * available_blocks); - - let total_size = total_size as f64 / (1024.0 * 1024.0 * 1024.0); - let used_size = used_size as f64 / (1024.0 * 1024.0 * 1024.0); - let usage = (used_size / total_size) * 100.0; - - let mut result = String::with_capacity(64); - write!( - result, - "{used_size:.2} GiB / {total_size:.2} GiB ({cyan}{usage:.0}%{reset})", - cyan = COLORS.cyan, - reset = COLORS.reset, - ) - .unwrap(); - - Ok(result) + Ok(format!( + "{used_size:.2} GiB / {total_size:.2} GiB ({CYAN}{usage:.0}%{RESET})" + )) } -/// Fast integer parsing without stdlib overhead -#[inline] -fn parse_u64_fast(s: &[u8]) -> u64 { - let mut result = 0u64; - for &byte in s { - if byte.is_ascii_digit() { - result = result * 10 + u64::from(byte - b'0'); - } else { - break; - } - } - result -} +pub fn get_memory_usage(info: SysInfo) -> String { + #[inline(always)] + fn parse_memory_info(info: SysInfo) -> (f64, f64) { + let total_memory_kb = (info.ram_total() / 1024) as f64; + let available_memory_kb = (info.ram_unused() / 1024) as f64; -/// Gets the system memory usage information. -/// -/// # Errors -/// -/// Returns an error if `/proc/meminfo` cannot be read. -#[cfg_attr(feature = "hotpath", hotpath::measure)] -pub fn get_memory_usage() -> Result { - #[cfg_attr(feature = "hotpath", hotpath::measure)] - fn parse_memory_info() -> Result<(f64, f64), io::Error> { - let mut total_memory_kb = 0u64; - let mut available_memory_kb = 0u64; - let mut buffer = [0u8; 1024]; + let total_memory_gb = total_memory_kb / (1024.0 * 1024.0); + let available_memory_gb = available_memory_kb / (1024.0 * 1024.0); + let used_memory_gb = total_memory_gb - available_memory_gb; - // Use fast syscall-based file reading - let bytes_read = read_file_fast("/proc/meminfo", &mut buffer)?; - let meminfo = &buffer[..bytes_read]; - - // Fast scanning for MemTotal and MemAvailable - let mut offset = 0; - let mut found_total = false; - let mut found_available = false; - - while offset < meminfo.len() && (!found_total || !found_available) { - let remaining = &meminfo[offset..]; - - // Find newline or end - let line_end = remaining - .iter() - .position(|&b| b == b'\n') - .unwrap_or(remaining.len()); - let line = &remaining[..line_end]; - - if line.starts_with(b"MemTotal:") { - // Skip "MemTotal:" and whitespace - let mut pos = 9; - while pos < line.len() && line[pos].is_ascii_whitespace() { - pos += 1; - } - total_memory_kb = parse_u64_fast(&line[pos..]); - found_total = true; - } else if line.starts_with(b"MemAvailable:") { - // Skip "MemAvailable:" and whitespace - let mut pos = 13; - while pos < line.len() && line[pos].is_ascii_whitespace() { - pos += 1; - } - available_memory_kb = parse_u64_fast(&line[pos..]); - found_available = true; - } - - offset += line_end + 1; + (used_memory_gb, total_memory_gb) } - #[allow(clippy::cast_precision_loss)] - let total_memory_gb = total_memory_kb as f64 / 1024.0 / 1024.0; - #[allow(clippy::cast_precision_loss)] - let available_memory_gb = available_memory_kb as f64 / 1024.0 / 1024.0; - let used_memory_gb = total_memory_gb - available_memory_gb; + let (used_memory, total_memory) = parse_memory_info(info); + let percentage_used = (used_memory / total_memory * 100.0).round() as u64; - Ok((used_memory_gb, total_memory_gb)) - } - - let (used_memory, total_memory) = parse_memory_info()?; - #[allow(clippy::cast_possible_truncation, clippy::cast_sign_loss)] - let percentage_used = (used_memory / total_memory * 100.0).round() as u64; - - let mut result = String::with_capacity(64); - write!( - result, - "{used_memory:.2} GiB / {total_memory:.2} GiB \ - ({cyan}{percentage_used}%{reset})", - cyan = COLORS.cyan, - reset = COLORS.reset, - ) - .unwrap(); - - Ok(result) + format!("{used_memory:.2} GiB / {total_memory:.2} GiB ({CYAN}{percentage_used}%{RESET})") } diff --git a/src/uptime.rs b/src/uptime.rs index 095af7d..6c44640 100644 --- a/src/uptime.rs +++ b/src/uptime.rs @@ -1,114 +1,26 @@ -use std::{io, mem::MaybeUninit}; +use color_eyre::Result; +use nix::sys::sysinfo::sysinfo; +use std::io; -/// Faster integer to string conversion without the formatting overhead. -#[inline] -fn itoa(mut n: u64, buf: &mut [u8]) -> &str { - if n == 0 { - return "0"; - } - - let mut i = buf.len(); - while n > 0 { - i -= 1; - buf[i] = b'0' + (n % 10) as u8; - n /= 10; - } - - unsafe { std::str::from_utf8_unchecked(&buf[i..]) } -} - -/// Direct `sysinfo` syscall using inline assembly -/// -/// # Safety -/// -/// This function uses inline assembly to make a direct syscall. -/// The caller must ensure the sysinfo pointer is valid. -#[inline] -unsafe fn sys_sysinfo(info: *mut libc::sysinfo) -> i64 { - #[cfg(target_arch = "x86_64")] - { - let ret: i64; - unsafe { - std::arch::asm!( - "syscall", - in("rax") 99_i64, // __NR_sysinfo - in("rdi") info, - out("rcx") _, - out("r11") _, - lateout("rax") ret, - options(nostack) - ); - } - ret - } - - #[cfg(target_arch = "aarch64")] - { - let ret: i64; - unsafe { - std::arch::asm!( - "svc #0", - in("x8") 179_i64, // __NR_sysinfo - in("x0") info, - lateout("x0") ret, - options(nostack) - ); - } - ret - } - - #[cfg(not(any(target_arch = "x86_64", target_arch = "aarch64")))] - { - unsafe { libc::sysinfo(info) as i64 } - } -} - -/// Gets the current system uptime. -/// -/// # Errors -/// -/// Returns an error if the system uptime cannot be retrieved. -#[cfg_attr(feature = "hotpath", hotpath::measure)] pub fn get_current() -> Result { - let uptime_seconds = { - let mut info = MaybeUninit::uninit(); - if unsafe { sys_sysinfo(info.as_mut_ptr()) } != 0 { - return Err(io::Error::last_os_error()); - } - #[allow(clippy::cast_sign_loss)] - unsafe { - info.assume_init().uptime as u64 - } - }; + let info = sysinfo().map_err(|e| io::Error::new(io::ErrorKind::Other, e))?; + let uptime_seconds = info.uptime().as_secs_f64(); - let days = uptime_seconds / 86400; - let hours = (uptime_seconds / 3600) % 24; - let minutes = (uptime_seconds / 60) % 60; + let total_minutes = (uptime_seconds / 60.0).round() as u64; + let days = total_minutes / (60 * 24); + let hours = (total_minutes % (60 * 24)) / 60; + let minutes = total_minutes % 60; - let mut result = String::with_capacity(32); - let mut buf = [0u8; 20]; // Enough for u64::MAX - - if days > 0 { - result.push_str(itoa(days, &mut buf)); - result.push_str(if days == 1 { " day" } else { " days" }); - } - if hours > 0 { - if !result.is_empty() { - result.push_str(", "); + let mut parts = Vec::with_capacity(3); + if days > 0 { + parts.push(format!("{days} days")); } - result.push_str(itoa(hours, &mut buf)); - result.push_str(if hours == 1 { " hour" } else { " hours" }); - } - if minutes > 0 { - if !result.is_empty() { - result.push_str(", "); + if hours > 0 || days > 0 { + parts.push(format!("{hours} hours")); + } + if minutes > 0 || hours > 0 || days > 0 { + parts.push(format!("{minutes} minutes")); } - result.push_str(itoa(minutes, &mut buf)); - result.push_str(if minutes == 1 { " minute" } else { " minutes" }); - } - if result.is_empty() { - result.push_str("less than a minute"); - } - Ok(result) + Ok(parts.join(", ")) }