diff --git a/.gitignore b/.gitignore index e7c4bf3..2e67b9a 100644 --- a/.gitignore +++ b/.gitignore @@ -7,6 +7,7 @@ *.dll *.so *.dylib +echo # Test binary, built with `go test -c` *.test diff --git a/README.md b/README.md index 9702c37..8822624 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,6 @@ # Echo -Janus allows you to setup a simple file server for local testing. +Echo allows you to setup a simple file server for local testing. ### Requirements diff --git a/default.nix b/default.nix new file mode 100644 index 0000000..40a5f10 --- /dev/null +++ b/default.nix @@ -0,0 +1,23 @@ +{ + buildGoModule, + lib, + ... +}: let + pname = "echo"; + version = "0.1.1"; +in + buildGoModule { + inherit pname version; + src = builtins.filterSource (path: type: type != "directory" || baseNameOf path != ".git" || lib.hasSuffix ".nix" path) ./.; + vendorHash = null; + + ldflags = ["-s" "-w" "-X main.version=${version}"]; + + meta = { + description = "Simple & lighweight mock server on localhost for testing."; + homepage = "https://github.com/notAShelf/echo"; + license = lib.licenses.gpl3Only; + maintainers = with lib.maintainers; [NotAShelf]; + mainProgram = pname; + }; + } diff --git a/flake.lock b/flake.lock new file mode 100644 index 0000000..eac3868 --- /dev/null +++ b/flake.lock @@ -0,0 +1,26 @@ +{ + "nodes": { + "nixpkgs": { + "locked": { + "lastModified": 1701454111, + "narHash": "sha256-G0Fvu9rBmeEozsFxLLIJKx/KG+/+MNW9Rq5y3V/BBqs=", + "owner": "NixOS", + "repo": "nixpkgs", + "rev": "c1f0be03736e6d5ab4d19e867e6684686203eee8", + "type": "github" + }, + "original": { + "owner": "NixOS", + "repo": "nixpkgs", + "type": "github" + } + }, + "root": { + "inputs": { + "nixpkgs": "nixpkgs" + } + } + }, + "root": "root", + "version": 7 +} diff --git a/flake.nix b/flake.nix new file mode 100644 index 0000000..22bfa3c --- /dev/null +++ b/flake.nix @@ -0,0 +1,23 @@ +{ + description = "Simple & lighweight mock server on localhost for testing. "; + inputs.nixpkgs.url = "github:NixOS/nixpkgs"; + + outputs = { + self, + nixpkgs, + }: let + systems = ["x86_64-linux" "aarch64-linux"]; + forEachSystem = nixpkgs.lib.genAttrs systems; + + pkgsForEach = nixpkgs.legacyPackages; + in { + packages = forEachSystem (system: { + echo = pkgsForEach.${system}.callPackage ./default.nix {}; + default = self.packages.${system}.echo; + }); + + devShells = forEachSystem (system: { + default = pkgsForEach.${system}.callPackage ./shell.nix {}; + }); + }; +} diff --git a/go.mod b/go.mod index a6fced6..bd85d8f 100644 --- a/go.mod +++ b/go.mod @@ -2,4 +2,4 @@ module notashelf.dev/echo go 1.21.4 -require github.com/joho/godotenv v1.5.1 +require github.com/joho/godotenv v1.5.1 // indiret diff --git a/main.go b/main.go index 10f3ba7..d5e32b9 100644 --- a/main.go +++ b/main.go @@ -2,6 +2,7 @@ package main import ( "fmt" + "html/template" "net/http" "os" "path/filepath" @@ -11,6 +12,13 @@ import ( "github.com/joho/godotenv" ) +var version string + +type PageData struct { + Files []string + Version string +} + func main() { err := godotenv.Load() if err != nil { @@ -33,8 +41,29 @@ func main() { return } - filePath := filepath.Join(basePath, r.URL.Path) - http.ServeFile(w, r, filePath) + if r.URL.Path == "/" { + files, err := os.ReadDir(basePath) + if err != nil { + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + + fileNames := make([]string, len(files)) + for i, file := range files { + fileNames[i] = file.Name() + } + + data := PageData{ + Files: fileNames, + Version: version, + } + + tmpl := template.Must(template.ParseFiles("public/template.html")) + tmpl.Execute(w, data) + } else { + filePath := filepath.Join(basePath, r.URL.Path) + http.ServeFile(w, r, filePath) + } }) port, _ := strconv.Atoi(serverPort) diff --git a/public/template.html b/public/template.html new file mode 100644 index 0000000..32e8abb --- /dev/null +++ b/public/template.html @@ -0,0 +1,97 @@ + + + + Directory Listing + + + +

Directory Listing

+ + + + + + + diff --git a/shell.nix b/shell.nix new file mode 100644 index 0000000..57104c6 --- /dev/null +++ b/shell.nix @@ -0,0 +1,15 @@ +{ + callPackage, + gopls, + go, +}: let + mainPkg = callPackage ./default.nix {}; +in + mainPkg.overrideAttrs (oa: { + nativeBuildInputs = + [ + gopls + go + ] + ++ (oa.nativeBuildInputs or []); + }) diff --git a/vendor/github.com/joho/godotenv/.gitignore b/vendor/github.com/joho/godotenv/.gitignore new file mode 100644 index 0000000..e43b0f9 --- /dev/null +++ b/vendor/github.com/joho/godotenv/.gitignore @@ -0,0 +1 @@ +.DS_Store diff --git a/vendor/github.com/joho/godotenv/LICENCE b/vendor/github.com/joho/godotenv/LICENCE new file mode 100644 index 0000000..e7ddd51 --- /dev/null +++ b/vendor/github.com/joho/godotenv/LICENCE @@ -0,0 +1,23 @@ +Copyright (c) 2013 John Barton + +MIT License + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + diff --git a/vendor/github.com/joho/godotenv/README.md b/vendor/github.com/joho/godotenv/README.md new file mode 100644 index 0000000..bfbe66a --- /dev/null +++ b/vendor/github.com/joho/godotenv/README.md @@ -0,0 +1,202 @@ +# GoDotEnv ![CI](https://github.com/joho/godotenv/workflows/CI/badge.svg) [![Go Report Card](https://goreportcard.com/badge/github.com/joho/godotenv)](https://goreportcard.com/report/github.com/joho/godotenv) + +A Go (golang) port of the Ruby [dotenv](https://github.com/bkeepers/dotenv) project (which loads env vars from a .env file). + +From the original Library: + +> Storing configuration in the environment is one of the tenets of a twelve-factor app. Anything that is likely to change between deployment environments–such as resource handles for databases or credentials for external services–should be extracted from the code into environment variables. +> +> But it is not always practical to set environment variables on development machines or continuous integration servers where multiple projects are run. Dotenv load variables from a .env file into ENV when the environment is bootstrapped. + +It can be used as a library (for loading in env for your own daemons etc.) or as a bin command. + +There is test coverage and CI for both linuxish and Windows environments, but I make no guarantees about the bin version working on Windows. + +## Installation + +As a library + +```shell +go get github.com/joho/godotenv +``` + +or if you want to use it as a bin command + +go >= 1.17 +```shell +go install github.com/joho/godotenv/cmd/godotenv@latest +``` + +go < 1.17 +```shell +go get github.com/joho/godotenv/cmd/godotenv +``` + +## Usage + +Add your application configuration to your `.env` file in the root of your project: + +```shell +S3_BUCKET=YOURS3BUCKET +SECRET_KEY=YOURSECRETKEYGOESHERE +``` + +Then in your Go app you can do something like + +```go +package main + +import ( + "log" + "os" + + "github.com/joho/godotenv" +) + +func main() { + err := godotenv.Load() + if err != nil { + log.Fatal("Error loading .env file") + } + + s3Bucket := os.Getenv("S3_BUCKET") + secretKey := os.Getenv("SECRET_KEY") + + // now do something with s3 or whatever +} +``` + +If you're even lazier than that, you can just take advantage of the autoload package which will read in `.env` on import + +```go +import _ "github.com/joho/godotenv/autoload" +``` + +While `.env` in the project root is the default, you don't have to be constrained, both examples below are 100% legit + +```go +godotenv.Load("somerandomfile") +godotenv.Load("filenumberone.env", "filenumbertwo.env") +``` + +If you want to be really fancy with your env file you can do comments and exports (below is a valid env file) + +```shell +# I am a comment and that is OK +SOME_VAR=someval +FOO=BAR # comments at line end are OK too +export BAR=BAZ +``` + +Or finally you can do YAML(ish) style + +```yaml +FOO: bar +BAR: baz +``` + +as a final aside, if you don't want godotenv munging your env you can just get a map back instead + +```go +var myEnv map[string]string +myEnv, err := godotenv.Read() + +s3Bucket := myEnv["S3_BUCKET"] +``` + +... or from an `io.Reader` instead of a local file + +```go +reader := getRemoteFile() +myEnv, err := godotenv.Parse(reader) +``` + +... or from a `string` if you so desire + +```go +content := getRemoteFileContent() +myEnv, err := godotenv.Unmarshal(content) +``` + +### Precedence & Conventions + +Existing envs take precedence of envs that are loaded later. + +The [convention](https://github.com/bkeepers/dotenv#what-other-env-files-can-i-use) +for managing multiple environments (i.e. development, test, production) +is to create an env named `{YOURAPP}_ENV` and load envs in this order: + +```go +env := os.Getenv("FOO_ENV") +if "" == env { + env = "development" +} + +godotenv.Load(".env." + env + ".local") +if "test" != env { + godotenv.Load(".env.local") +} +godotenv.Load(".env." + env) +godotenv.Load() // The Original .env +``` + +If you need to, you can also use `godotenv.Overload()` to defy this convention +and overwrite existing envs instead of only supplanting them. Use with caution. + +### Command Mode + +Assuming you've installed the command as above and you've got `$GOPATH/bin` in your `$PATH` + +``` +godotenv -f /some/path/to/.env some_command with some args +``` + +If you don't specify `-f` it will fall back on the default of loading `.env` in `PWD` + +By default, it won't override existing environment variables; you can do that with the `-o` flag. + +### Writing Env Files + +Godotenv can also write a map representing the environment to a correctly-formatted and escaped file + +```go +env, err := godotenv.Unmarshal("KEY=value") +err := godotenv.Write(env, "./.env") +``` + +... or to a string + +```go +env, err := godotenv.Unmarshal("KEY=value") +content, err := godotenv.Marshal(env) +``` + +## Contributing + +Contributions are welcome, but with some caveats. + +This library has been declared feature complete (see [#182](https://github.com/joho/godotenv/issues/182) for background) and will not be accepting issues or pull requests adding new functionality or breaking the library API. + +Contributions would be gladly accepted that: + +* bring this library's parsing into closer compatibility with the mainline dotenv implementations, in particular [Ruby's dotenv](https://github.com/bkeepers/dotenv) and [Node.js' dotenv](https://github.com/motdotla/dotenv) +* keep the library up to date with the go ecosystem (ie CI bumps, documentation changes, changes in the core libraries) +* bug fixes for use cases that pertain to the library's purpose of easing development of codebases deployed into twelve factor environments + +*code changes without tests and references to peer dotenv implementations will not be accepted* + +1. Fork it +2. Create your feature branch (`git checkout -b my-new-feature`) +3. Commit your changes (`git commit -am 'Added some feature'`) +4. Push to the branch (`git push origin my-new-feature`) +5. Create new Pull Request + +## Releases + +Releases should follow [Semver](http://semver.org/) though the first couple of releases are `v1` and `v1.1`. + +Use [annotated tags for all releases](https://github.com/joho/godotenv/issues/30). Example `git tag -a v1.2.1` + +## Who? + +The original library [dotenv](https://github.com/bkeepers/dotenv) was written by [Brandon Keepers](http://opensoul.org/), and this port was done by [John Barton](https://johnbarton.co/) based off the tests/fixtures in the original library. diff --git a/vendor/github.com/joho/godotenv/godotenv.go b/vendor/github.com/joho/godotenv/godotenv.go new file mode 100644 index 0000000..61b0ebb --- /dev/null +++ b/vendor/github.com/joho/godotenv/godotenv.go @@ -0,0 +1,228 @@ +// Package godotenv is a go port of the ruby dotenv library (https://github.com/bkeepers/dotenv) +// +// Examples/readme can be found on the GitHub page at https://github.com/joho/godotenv +// +// The TL;DR is that you make a .env file that looks something like +// +// SOME_ENV_VAR=somevalue +// +// and then in your go code you can call +// +// godotenv.Load() +// +// and all the env vars declared in .env will be available through os.Getenv("SOME_ENV_VAR") +package godotenv + +import ( + "bytes" + "fmt" + "io" + "os" + "os/exec" + "sort" + "strconv" + "strings" +) + +const doubleQuoteSpecialChars = "\\\n\r\"!$`" + +// Parse reads an env file from io.Reader, returning a map of keys and values. +func Parse(r io.Reader) (map[string]string, error) { + var buf bytes.Buffer + _, err := io.Copy(&buf, r) + if err != nil { + return nil, err + } + + return UnmarshalBytes(buf.Bytes()) +} + +// Load will read your env file(s) and load them into ENV for this process. +// +// Call this function as close as possible to the start of your program (ideally in main). +// +// If you call Load without any args it will default to loading .env in the current path. +// +// You can otherwise tell it which files to load (there can be more than one) like: +// +// godotenv.Load("fileone", "filetwo") +// +// It's important to note that it WILL NOT OVERRIDE an env variable that already exists - consider the .env file to set dev vars or sensible defaults. +func Load(filenames ...string) (err error) { + filenames = filenamesOrDefault(filenames) + + for _, filename := range filenames { + err = loadFile(filename, false) + if err != nil { + return // return early on a spazout + } + } + return +} + +// Overload will read your env file(s) and load them into ENV for this process. +// +// Call this function as close as possible to the start of your program (ideally in main). +// +// If you call Overload without any args it will default to loading .env in the current path. +// +// You can otherwise tell it which files to load (there can be more than one) like: +// +// godotenv.Overload("fileone", "filetwo") +// +// It's important to note this WILL OVERRIDE an env variable that already exists - consider the .env file to forcefully set all vars. +func Overload(filenames ...string) (err error) { + filenames = filenamesOrDefault(filenames) + + for _, filename := range filenames { + err = loadFile(filename, true) + if err != nil { + return // return early on a spazout + } + } + return +} + +// Read all env (with same file loading semantics as Load) but return values as +// a map rather than automatically writing values into env +func Read(filenames ...string) (envMap map[string]string, err error) { + filenames = filenamesOrDefault(filenames) + envMap = make(map[string]string) + + for _, filename := range filenames { + individualEnvMap, individualErr := readFile(filename) + + if individualErr != nil { + err = individualErr + return // return early on a spazout + } + + for key, value := range individualEnvMap { + envMap[key] = value + } + } + + return +} + +// Unmarshal reads an env file from a string, returning a map of keys and values. +func Unmarshal(str string) (envMap map[string]string, err error) { + return UnmarshalBytes([]byte(str)) +} + +// UnmarshalBytes parses env file from byte slice of chars, returning a map of keys and values. +func UnmarshalBytes(src []byte) (map[string]string, error) { + out := make(map[string]string) + err := parseBytes(src, out) + + return out, err +} + +// Exec loads env vars from the specified filenames (empty map falls back to default) +// then executes the cmd specified. +// +// Simply hooks up os.Stdin/err/out to the command and calls Run(). +// +// If you want more fine grained control over your command it's recommended +// that you use `Load()`, `Overload()` or `Read()` and the `os/exec` package yourself. +func Exec(filenames []string, cmd string, cmdArgs []string, overload bool) error { + op := Load + if overload { + op = Overload + } + if err := op(filenames...); err != nil { + return err + } + + command := exec.Command(cmd, cmdArgs...) + command.Stdin = os.Stdin + command.Stdout = os.Stdout + command.Stderr = os.Stderr + return command.Run() +} + +// Write serializes the given environment and writes it to a file. +func Write(envMap map[string]string, filename string) error { + content, err := Marshal(envMap) + if err != nil { + return err + } + file, err := os.Create(filename) + if err != nil { + return err + } + defer file.Close() + _, err = file.WriteString(content + "\n") + if err != nil { + return err + } + return file.Sync() +} + +// Marshal outputs the given environment as a dotenv-formatted environment file. +// Each line is in the format: KEY="VALUE" where VALUE is backslash-escaped. +func Marshal(envMap map[string]string) (string, error) { + lines := make([]string, 0, len(envMap)) + for k, v := range envMap { + if d, err := strconv.Atoi(v); err == nil { + lines = append(lines, fmt.Sprintf(`%s=%d`, k, d)) + } else { + lines = append(lines, fmt.Sprintf(`%s="%s"`, k, doubleQuoteEscape(v))) + } + } + sort.Strings(lines) + return strings.Join(lines, "\n"), nil +} + +func filenamesOrDefault(filenames []string) []string { + if len(filenames) == 0 { + return []string{".env"} + } + return filenames +} + +func loadFile(filename string, overload bool) error { + envMap, err := readFile(filename) + if err != nil { + return err + } + + currentEnv := map[string]bool{} + rawEnv := os.Environ() + for _, rawEnvLine := range rawEnv { + key := strings.Split(rawEnvLine, "=")[0] + currentEnv[key] = true + } + + for key, value := range envMap { + if !currentEnv[key] || overload { + _ = os.Setenv(key, value) + } + } + + return nil +} + +func readFile(filename string) (envMap map[string]string, err error) { + file, err := os.Open(filename) + if err != nil { + return + } + defer file.Close() + + return Parse(file) +} + +func doubleQuoteEscape(line string) string { + for _, c := range doubleQuoteSpecialChars { + toReplace := "\\" + string(c) + if c == '\n' { + toReplace = `\n` + } + if c == '\r' { + toReplace = `\r` + } + line = strings.Replace(line, string(c), toReplace, -1) + } + return line +} diff --git a/vendor/github.com/joho/godotenv/parser.go b/vendor/github.com/joho/godotenv/parser.go new file mode 100644 index 0000000..cc709af --- /dev/null +++ b/vendor/github.com/joho/godotenv/parser.go @@ -0,0 +1,271 @@ +package godotenv + +import ( + "bytes" + "errors" + "fmt" + "regexp" + "strings" + "unicode" +) + +const ( + charComment = '#' + prefixSingleQuote = '\'' + prefixDoubleQuote = '"' + + exportPrefix = "export" +) + +func parseBytes(src []byte, out map[string]string) error { + src = bytes.Replace(src, []byte("\r\n"), []byte("\n"), -1) + cutset := src + for { + cutset = getStatementStart(cutset) + if cutset == nil { + // reached end of file + break + } + + key, left, err := locateKeyName(cutset) + if err != nil { + return err + } + + value, left, err := extractVarValue(left, out) + if err != nil { + return err + } + + out[key] = value + cutset = left + } + + return nil +} + +// getStatementPosition returns position of statement begin. +// +// It skips any comment line or non-whitespace character. +func getStatementStart(src []byte) []byte { + pos := indexOfNonSpaceChar(src) + if pos == -1 { + return nil + } + + src = src[pos:] + if src[0] != charComment { + return src + } + + // skip comment section + pos = bytes.IndexFunc(src, isCharFunc('\n')) + if pos == -1 { + return nil + } + + return getStatementStart(src[pos:]) +} + +// locateKeyName locates and parses key name and returns rest of slice +func locateKeyName(src []byte) (key string, cutset []byte, err error) { + // trim "export" and space at beginning + src = bytes.TrimLeftFunc(src, isSpace) + if bytes.HasPrefix(src, []byte(exportPrefix)) { + trimmed := bytes.TrimPrefix(src, []byte(exportPrefix)) + if bytes.IndexFunc(trimmed, isSpace) == 0 { + src = bytes.TrimLeftFunc(trimmed, isSpace) + } + } + + // locate key name end and validate it in single loop + offset := 0 +loop: + for i, char := range src { + rchar := rune(char) + if isSpace(rchar) { + continue + } + + switch char { + case '=', ':': + // library also supports yaml-style value declaration + key = string(src[0:i]) + offset = i + 1 + break loop + case '_': + default: + // variable name should match [A-Za-z0-9_.] + if unicode.IsLetter(rchar) || unicode.IsNumber(rchar) || rchar == '.' { + continue + } + + return "", nil, fmt.Errorf( + `unexpected character %q in variable name near %q`, + string(char), string(src)) + } + } + + if len(src) == 0 { + return "", nil, errors.New("zero length string") + } + + // trim whitespace + key = strings.TrimRightFunc(key, unicode.IsSpace) + cutset = bytes.TrimLeftFunc(src[offset:], isSpace) + return key, cutset, nil +} + +// extractVarValue extracts variable value and returns rest of slice +func extractVarValue(src []byte, vars map[string]string) (value string, rest []byte, err error) { + quote, hasPrefix := hasQuotePrefix(src) + if !hasPrefix { + // unquoted value - read until end of line + endOfLine := bytes.IndexFunc(src, isLineEnd) + + // Hit EOF without a trailing newline + if endOfLine == -1 { + endOfLine = len(src) + + if endOfLine == 0 { + return "", nil, nil + } + } + + // Convert line to rune away to do accurate countback of runes + line := []rune(string(src[0:endOfLine])) + + // Assume end of line is end of var + endOfVar := len(line) + if endOfVar == 0 { + return "", src[endOfLine:], nil + } + + // Work backwards to check if the line ends in whitespace then + // a comment (ie asdasd # some comment) + for i := endOfVar - 1; i >= 0; i-- { + if line[i] == charComment && i > 0 { + if isSpace(line[i-1]) { + endOfVar = i + break + } + } + } + + trimmed := strings.TrimFunc(string(line[0:endOfVar]), isSpace) + + return expandVariables(trimmed, vars), src[endOfLine:], nil + } + + // lookup quoted string terminator + for i := 1; i < len(src); i++ { + if char := src[i]; char != quote { + continue + } + + // skip escaped quote symbol (\" or \', depends on quote) + if prevChar := src[i-1]; prevChar == '\\' { + continue + } + + // trim quotes + trimFunc := isCharFunc(rune(quote)) + value = string(bytes.TrimLeftFunc(bytes.TrimRightFunc(src[0:i], trimFunc), trimFunc)) + if quote == prefixDoubleQuote { + // unescape newlines for double quote (this is compat feature) + // and expand environment variables + value = expandVariables(expandEscapes(value), vars) + } + + return value, src[i+1:], nil + } + + // return formatted error if quoted string is not terminated + valEndIndex := bytes.IndexFunc(src, isCharFunc('\n')) + if valEndIndex == -1 { + valEndIndex = len(src) + } + + return "", nil, fmt.Errorf("unterminated quoted value %s", src[:valEndIndex]) +} + +func expandEscapes(str string) string { + out := escapeRegex.ReplaceAllStringFunc(str, func(match string) string { + c := strings.TrimPrefix(match, `\`) + switch c { + case "n": + return "\n" + case "r": + return "\r" + default: + return match + } + }) + return unescapeCharsRegex.ReplaceAllString(out, "$1") +} + +func indexOfNonSpaceChar(src []byte) int { + return bytes.IndexFunc(src, func(r rune) bool { + return !unicode.IsSpace(r) + }) +} + +// hasQuotePrefix reports whether charset starts with single or double quote and returns quote character +func hasQuotePrefix(src []byte) (prefix byte, isQuored bool) { + if len(src) == 0 { + return 0, false + } + + switch prefix := src[0]; prefix { + case prefixDoubleQuote, prefixSingleQuote: + return prefix, true + default: + return 0, false + } +} + +func isCharFunc(char rune) func(rune) bool { + return func(v rune) bool { + return v == char + } +} + +// isSpace reports whether the rune is a space character but not line break character +// +// this differs from unicode.IsSpace, which also applies line break as space +func isSpace(r rune) bool { + switch r { + case '\t', '\v', '\f', '\r', ' ', 0x85, 0xA0: + return true + } + return false +} + +func isLineEnd(r rune) bool { + if r == '\n' || r == '\r' { + return true + } + return false +} + +var ( + escapeRegex = regexp.MustCompile(`\\.`) + expandVarRegex = regexp.MustCompile(`(\\)?(\$)(\()?\{?([A-Z0-9_]+)?\}?`) + unescapeCharsRegex = regexp.MustCompile(`\\([^$])`) +) + +func expandVariables(v string, m map[string]string) string { + return expandVarRegex.ReplaceAllStringFunc(v, func(s string) string { + submatch := expandVarRegex.FindStringSubmatch(s) + + if submatch == nil { + return s + } + if submatch[1] == "\\" || submatch[2] == "(" { + return submatch[0][1:] + } else if submatch[4] != "" { + return m[submatch[4]] + } + return s + }) +} diff --git a/vendor/modules.txt b/vendor/modules.txt new file mode 100644 index 0000000..e0d9001 --- /dev/null +++ b/vendor/modules.txt @@ -0,0 +1,3 @@ +# github.com/joho/godotenv v1.5.1 +## explicit; go 1.12 +github.com/joho/godotenv