Implement an SSH config parser

.golangci.yml

@@ -18,6 +18,8 @@ linters:
     - forbidigo
     - gochecknoinits
     - gochecknoglobals
+    - gocognit # cyclop is used instead
+    - gocyclo # cyclop is used instead
     - godox
     - golint
     - interfacer
@@ -50,8 +52,11 @@ linters-settings:
     ignore-decls:
       - w http.ResponseWriter
       - r *http.Request
+      - r io.Reader
       - i int
       - n int
+      - j int
+      - ok bool
       - p []byte
       - mu sync.Mutex
       - wg sync.WaitGroup
@@ -73,3 +78,9 @@ issues:
     - EXC0015
   max-issues-per-linter: 0
   max-same-issues: 0
+  exclude-rules:
+    - linters: 
+      - errname # lots of false positives for an unknown reason
+      - revive # no need for comments on obvious vars like BooleanOptionYes
+      path: 'options/options\.go'
+

README.md

@@ -2,7 +2,7 @@
 
 ### Rig
 
-[![GoDoc](https://godoc.org/github.com/k0sproject/rig?status.svg)](https://godoc.org/github.com/k0sproject/rig)
+[![GoDoc](https://godoc.org/github.com/k0sproject/rig/v2/?status.svg)](https://godoc.org/github.com/k0sproject/rig/v2)
 [![Go Report Card](https://goreportcard.com/badge/github.com/k0sproject/rig)](https://goreportcard.com/report/github.com/k0sproject/rig)
 [![Build Status](https://travis-ci.com/k0sproject/rig.svg?branch=main)](https://travis-ci.com/k0sproject/rig)
 [![codecov](https://codecov.io/gh/k0sproject/rig/branch/main/graph/badge.svg)](https://codecov.io/gh/k0sproject/rig)

homedir/expand.go

@@ -6,19 +6,20 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"path"
 	"path/filepath"
 	"strings"
 )
 
 var errNotImplemented = errors.New("not implemented")
 
 // Expand does ~/ style path expansion for files under current user home. ~user/ style paths are not supported.
-func Expand(path string) (string, error) {
-	if !strings.HasPrefix(path, "~") {
-		return path, nil
+func Expand(dir string) (string, error) {
+	if !strings.HasPrefix(dir, "~") {
+		return dir, nil
 	}
 
-	parts := strings.Split(path, string(os.PathSeparator))
+	parts := strings.Split(dir, string(os.PathSeparator))
 	if parts[0] != "~" {
 		return "", fmt.Errorf("%w: ~user/ style paths not supported", errNotImplemented)
 	}
@@ -27,8 +28,9 @@ func Expand(path string) (string, error) {
 	if err != nil {
 		return "", fmt.Errorf("homedir expand: %w", err)
 	}
+	home = strings.ReplaceAll(filepath.Clean(home), "\\", "/")
 
 	parts[0] = home
 
-	return filepath.Join(parts...), nil
+	return path.Join(parts...), nil
 }

homedir/expand_windows.go

@@ -9,6 +9,9 @@ import (
 
 // Expand does ~/ style path expansion for files under current user home. On windows, this supports paths like %USERPROFILE%\path.
 func Expand(path string) (string, error) {
+	if strings.Contains(path, "/") {
+		path = filepath.FromSlash(path)
+	}
 	parts := strings.Split(path, string(os.PathSeparator))
 	if parts[0] != "~" && parts[0] != "%USERPROFILE%" && parts[0] != "%userprofile%" && parts[0] != "%HOME%" && parts[0] != "%home%" {
 		return path, nil

log/logger.go

@@ -58,6 +58,11 @@ func SetTraceLogger(l TraceLogger) {
 	trace = sync.OnceValue(func() TraceLogger { return l })
 }
 
+// GetTraceLogger gets the current value of trace logger.
+func GetTraceLogger() TraceLogger {
+	return trace()
+}
+
 // TraceLogger is a logger for rig's internal trace logging.
 type TraceLogger interface {
 	Log(ctx context.Context, level slog.Level, msg string, keysAndValues ...any)

sh/shellescape/README.md

@@ -2,10 +2,12 @@
 
 A drop-in replacement for [alessio/shellescape](https://github.com/alessio/shellescape) / ["gopkg.in/alessio/shellescape.v1"]("gopkg.in/alessio/shellescape.v1").
 
-It's a bit faster and allocates a little bit less. It's quite unlikely that anyone will notice any difference in a real-world application, the is here just to reduce dependencies of the `rig` package.
+It's a tiny bit faster and allocates a tiny bit less. It's quite unlikely that anyone will notice any difference in a real-world application, the is here just to reduce dependencies of the `rig` package.
 
 To use, replace `alessio/shellescape` with `github.com/k0sproject/rig/v2/sh/shellescape` in your imports.
 
+In addition to the original package, this package also includes `Unquote`, `Split` and `Expand` (which supports `${var}`, `$var`, `$(cmd)` and `${var:-word}` and some other expansions).
+
 ## Benchmarks
 
 Just out of curiosity.