add demo to README

Cargo.lock

@@ -105,7 +105,7 @@ checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
 
 [[package]]
 name = "microfetch"
-version = "0.2.0"
+version = "0.3.0"
 dependencies = [
  "color-eyre",
  "nix",

Cargo.toml

@@ -1,10 +1,10 @@
 [package]
 name = "microfetch"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2021"
 
 [dependencies]
-nix = {version = "0.29", features = ["fs"]}
+nix = {version = "0.29", features = ["fs", "hostname"]}
 color-eyre = { version = "0.6", default-features = false }
 
 [profile.release]
@@ -13,6 +13,3 @@ opt-level = "z"
 lto = true
 codegen-units = 1
 panic = "abort"
-
-
-

README.md

@@ -1,16 +1,35 @@
 # Microfetch
 
-A stupidly simple fetch program written in Rust.
+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.
+
+![Demo](.github/assets/demo.png)
 
 ## Features
 
-Microfetch can reliably detect and display the following:
+- Fast
+- Really fast
+- Minimal dependencies
+- Actually very fast
+- Cool NixOS logo (other, inferior, distros are not supported)
+- Reliable detection of following info:
+  - Hostname/Username
+  - Kernel
+    - Name
+    - Version
+    - Architecture
+  - Current shell (from $SHELL)
+  - WM/Compositor and display backend
+  - Memory Usage/Total Memory
+  - Storage Usage/Total Storage (for `/` only)
+  - Shell Colors
 
-- Hostname/Username
-- Kernel
-  - Name
-  - Version
-  - Architecture
-- WM/Compositor and display backend
-- Memory Usage/Total Memory
-- Storage Usage/Total Storage (for `/` only)
+## Customizing
+
+You can't.
+
+## License
+
+Microfetch is licensed under [GPL3](LICENSE). See the license file for details.

src/colors.rs

@@ -4,3 +4,10 @@ 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 fn print_dots() -> Result<String, std::io::Error> {
+    let colors = format!("{BLUE}  {CYAN}  {GREEN}  {YELLOW}  {RED}  {MAGENTA}  {RESET}");
+
+    Ok(colors)
+}

src/main.rs

@@ -4,13 +4,13 @@ mod release;
 mod system;
 mod uptime;
 
-use color_eyre::{Report, Result};
-
-use crate::colors::{BLUE, CYAN, RESET};
+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_username_and_hostname};
+use crate::system::{get_memory_usage, get_root_disk_usage, get_shell, get_username_and_hostname};
 use crate::uptime::get_current;
+use color_eyre::Report;
+use nix::sys::sysinfo::sysinfo;
 
 fn main() -> Result<(), Report> {
     color_eyre::install()?;
@@ -18,19 +18,24 @@ fn main() -> Result<(), Report> {
     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 memory_usage = get_memory_usage()?;
+    let sys_info = sysinfo()?;
+    let memory_usage = get_memory_usage(sys_info);
     let storage = get_root_disk_usage()?;
+    let colors = print_dots()?;
 
     print_system_info(
         &user_info,
         &os_name,
         &kernel_version,
+        &shell,
         &uptime,
         &window_manager,
         &memory_usage,
         &storage,
+        &colors,
     );
 
     Ok(())
@@ -40,20 +45,24 @@ fn print_system_info(
     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}
-{BLUE}   ▟▛    ▜{CYAN}▃▟🬕        {CYAN}  {BLUE}Kernel{RESET}        {kernel_version}
-{BLUE}🬋🬋🬫█      {CYAN}█🬛🬋🬋       {CYAN}  {BLUE}Uptime{RESET}        {uptime}
-{BLUE} 🬷▛🮃{CYAN}▙    ▟▛          {CYAN}  {BLUE}WM{RESET}            {window_manager}
-{BLUE} 🮃 {CYAN}▟█🬴{BLUE}▀▀▀█🬴▀▀        {CYAN}󰍛  {BLUE}Memory{RESET}        {memory_usage}
-{CYAN}  ▝▀ ▀▘   {BLUE}▀▘         {CYAN}󱥎  {BLUE}Storage (/){RESET}   {storage}
+ {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}
     "
     );
 }

src/release.rs

@@ -1,38 +1,27 @@
 use color_eyre::Result;
 use std::fs::{self, read_to_string};
-use std::io::{self, Read};
+use std::io;
 
 // 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<String, io::Error> {
+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".to_string())
+        Ok("Linux")
     } else if fs::metadata("/etc/rc.conf").is_ok() || fs::metadata("/etc/bsd-release").is_ok() {
-        Ok("BSD".to_string())
+        Ok("BSD")
     } else {
-        Ok("Unknown".to_string())
+        Ok("Unknown")
     }
 }
 
-fn get_architecture() -> Result<String, io::Error> {
-    // Read architecture from /proc/sys/kernel/arch
-    let mut arch = String::new();
-    fs::File::open("/proc/sys/kernel/arch")?.read_to_string(&mut arch)?;
-    let arch = arch.trim().to_string();
-    Ok(arch)
-}
-
 pub fn get_system_info() -> Result<String, io::Error> {
     let system = detect_os()?;
 
-    let mut kernel_release = String::new();
-    fs::File::open("/proc/sys/kernel/osrelease")?.read_to_string(&mut kernel_release)?;
-    let kernel_release = kernel_release.trim().to_string();
+    let kernel_release = read_to_string("/proc/sys/kernel/osrelease")?;
+    let kernel_release = kernel_release.trim();
 
-    let mut cpuinfo = String::new();
-    fs::File::open("/proc/cpuinfo")?.read_to_string(&mut cpuinfo)?;
-
-    let architecture = get_architecture()?;
+    let architecture = read_to_string("/proc/sys/kernel/arch")?;
+    let architecture = architecture.trim();
 
     let result = format!("{system} {kernel_release} ({architecture})");
     Ok(result)

src/system.rs

@@ -1,21 +1,29 @@
 use nix::sys::statvfs::statvfs;
+use nix::sys::sysinfo::SysInfo;
 
 use std::env;
-use std::fs::File;
-use std::io::{self, BufRead};
-use std::path::Path;
-use std::process::Command;
+use std::io::{self};
 
 use crate::colors::{CYAN, GREEN, RED, RESET, YELLOW};
 
 pub fn get_username_and_hostname() -> Result<String, io::Error> {
     let username = env::var("USER").unwrap_or_else(|_| "unknown_user".to_string());
-    let output = Command::new("hostname").output()?;
-    let hostname = String::from_utf8_lossy(&output.stdout).trim().to_string();
+    let hostname = nix::unistd::gethostname()?;
+    let hostname = hostname.to_string_lossy();
 
     Ok(format!("{YELLOW}{username}{RED}@{GREEN}{hostname}"))
 }
 
+pub fn get_shell() -> Result<String, io::Error> {
+    // In some setups, $SHELL is set to the store path
+    // of the actual shell program. While we can consider
+    // trimming by name, I will leave it to the user to handle
+    // what their SHELL variable is really set to.
+    let shell = env::var("SHELL").unwrap_or_else(|_| "unknown_shell".to_string());
+
+    Ok(shell)
+}
+
 pub fn get_root_disk_usage() -> Result<String, io::Error> {
     let vfs = statvfs("/")?;
     let block_size = vfs.block_size() as u64;
@@ -34,49 +42,21 @@ pub fn get_root_disk_usage() -> Result<String, io::Error> {
     ))
 }
 
-pub fn get_memory_usage() -> Result<String, io::Error> {
-    fn parse_memory_info() -> Result<(f64, f64), io::Error> {
-        let path = Path::new("/proc/meminfo");
-        let file = File::open(path)?;
-        let reader = io::BufReader::new(file);
-
-        let mut total_memory_kb = 0.0;
-        let mut available_memory_kb = 0.0;
-
-        for line in reader.lines() {
-            let line = line?;
-            if line.starts_with("MemTotal:") {
-                total_memory_kb = line
-                    .split_whitespace()
-                    .nth(1)
-                    .ok_or_else(|| {
-                        io::Error::new(io::ErrorKind::InvalidData, "Failed to parse MemTotal")
-                    })?
-                    .parse::<f64>()
-                    .unwrap_or(0.0);
-            } else if line.starts_with("MemAvailable:") {
-                available_memory_kb = line
-                    .split_whitespace()
-                    .nth(1)
-                    .ok_or_else(|| {
-                        io::Error::new(io::ErrorKind::InvalidData, "Failed to parse MemAvailable")
-                    })?
-                    .parse::<f64>()
-                    .unwrap_or(0.0);
-            }
-        }
+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;
 
         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;
 
-        Ok((used_memory_gb, total_memory_gb))
+        (used_memory_gb, total_memory_gb)
     }
 
-    let (used_memory, total_memory) = parse_memory_info()?;
+    let (used_memory, total_memory) = parse_memory_info(info);
     let percentage_used = (used_memory / total_memory * 100.0).round() as u64;
 
-    Ok(format!(
-        "{used_memory:.2} GiB / {total_memory:.2} GiB ({CYAN}{percentage_used}%{RESET})"
-    ))
+    format!("{used_memory:.2} GiB / {total_memory:.2} GiB ({CYAN}{percentage_used}%{RESET})")
 }

src/uptime.rs

@@ -25,7 +25,7 @@ pub fn get_current() -> Result<String, io::Error> {
     let hours = (total_minutes % (60 * 24)) / 60;
     let minutes = total_minutes % 60;
 
-    let mut parts = Vec::new();
+    let mut parts = Vec::with_capacity(3);
     if days > 0 {
         parts.push(format!("{days} days"));
     }