add windows symlink & junction support

Signed-off-by: walnuts1018 <r.juglans.1018@gmail.com>

.github/workflows/test.yaml

@@ -26,6 +26,6 @@ jobs:
       with:
         go-version-file: go.mod
     - name: test
-      run: go test -coverprofile coverage.out -covermode atomic ./...
+      run: sudo go test -coverprofile coverage.out -covermode atomic ./...
     - name: Send coverage
       uses: codecov/codecov-action@v1

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/saracen/walker v0.1.4
 	github.com/urfave/cli/v2 v2.27.2
 	golang.org/x/net v0.27.0
-	golang.org/x/sync v0.7.0
+	golang.org/x/sync v0.8.0
 )
 
 require (
@@ -23,6 +23,7 @@ require (
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/xrash/smetrics v0.0.0-20240521201337-686a1a2994c1 // indirect
 	golang.org/x/sys v0.22.0 // indirect
+	golang.org/x/text v0.19.0
 	golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -84,8 +84,8 @@ golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.27.0 h1:5K3Njcw06/l2y9vpGCSdcxWOYHOUk3dVNGDXN+FvAys=
 golang.org/x/net v0.27.0/go.mod h1:dDi0PyhWNoiUOrAS8uXv/vnScO4wnHQO4mj9fn/RytE=
-golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
-golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
+golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -104,6 +104,8 @@ golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9sn
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.19.0 h1:kTxAhCbGbxhK0IwgSKiMO5awPoDQ0RpfiVYBfK860YM=
+golang.org/x/text v0.19.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20220609144429-65e65417b02f/go.mod h1:K8+ghG5WaK9qNqU5K3HdILfMLy1f3aNYFI/wnl100a8=

helpers_unix.go

@@ -2,6 +2,12 @@
 
 package main
 
+import "path/filepath"
+
 func toFullPath(s string) (string, error) {
 	return s, nil
 }
+
+func evalSymlinks(path string) (string, error) {
+	return filepath.EvalSymlinks(path)
+}

helpers_windows.go

@@ -2,7 +2,12 @@
 
 package main
 
-import "syscall"
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"syscall"
+)
 
 func toFullPath(s string) (string, error) {
 	p := syscall.StringToUTF16(s)
@@ -21,3 +26,42 @@ func toFullPath(s string) (string, error) {
 	b = b[:n]
 	return syscall.UTF16ToString(b), nil
 }
+
+func evalSymlinks(path string) (string, error) {
+	_, err := os.Stat(path)
+	if err != nil {
+		return "", err
+	}
+
+	list := filepathSplitAll(path)
+	evaled := list[0]
+	for i := 1; i < len(list); i++ {
+		evaled = filepath.Join(evaled, list[i])
+
+		linkSrc, err := os.Readlink(evaled)
+		if err != nil {
+			// not symlink
+			continue
+		} else {
+			if filepath.IsAbs(linkSrc) {
+				evaled = linkSrc
+			} else {
+				evaled = filepath.Join(filepath.Dir(evaled), linkSrc)
+			}
+		}
+	}
+
+	return evaled, nil
+}
+
+func filepathSplitAll(path string) []string {
+	path = filepath.Clean(path)
+	path = filepath.ToSlash(path)
+
+	vol := filepath.VolumeName(path)
+
+	path = path[len(vol):]
+	list := strings.Split(path, "/")
+	list[0] = vol + string(filepath.Separator) + list[0]
+	return list
+}

helpers_windows_test.go

@@ -0,0 +1,115 @@
+//go:build windows
+
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"testing"
+
+	"golang.org/x/text/encoding/japanese"
+	"golang.org/x/text/transform"
+)
+
+type testEvalSymlinksMode int
+
+const (
+	testEvalSymlinksNotLink testEvalSymlinksMode = iota
+	testEvalSymlinksSymbolicLink
+	testEvalSymlinksJunction
+)
+
+func Test_evalSymlinks(t *testing.T) {
+	type args struct {
+		path string
+	}
+	tests := []struct {
+		name         string
+		mode         testEvalSymlinksMode
+		linkBasePath string
+		args         args
+		want         string
+		wantErr      bool
+	}{
+		{
+			name: "not link",
+			mode: testEvalSymlinksNotLink,
+			args: args{
+				path: filepath.Join(os.TempDir(), "not_link"),
+			},
+			want:    filepath.Join(os.TempDir(), "not_link"),
+			wantErr: false,
+		},
+		{
+			name:         "symbolic link",
+			mode:         testEvalSymlinksSymbolicLink,
+			linkBasePath: filepath.Join(os.TempDir(), "link_base"),
+			args: args{
+				path: filepath.Join(os.TempDir(), "symbolic_link"),
+			},
+			want:    filepath.Join(os.TempDir(), "link_base"),
+			wantErr: false,
+		},
+		{
+			name:         "junction",
+			mode:         testEvalSymlinksJunction,
+			linkBasePath: filepath.Join(os.TempDir(), "link_base"),
+			args: args{
+				path: filepath.Join(os.TempDir(), "junction"),
+			},
+			want:    filepath.Join(os.TempDir(), "link_base"),
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if err := createLink(tt.linkBasePath, tt.args.path, tt.mode); err != nil {
+				t.Errorf("failed to create link: %v", err)
+				return
+			}
+
+			got, err := evalSymlinks(tt.args.path)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("evalSymlinks() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if got != tt.want {
+				t.Errorf("evalSymlinks() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func createLink(linkBasePath, path string, mode testEvalSymlinksMode) error {
+	if err := os.RemoveAll(path); err != nil {
+		return err
+	}
+
+	if mode == testEvalSymlinksNotLink {
+		return os.MkdirAll(path, 0755)
+	}
+
+	if err := os.MkdirAll(linkBasePath, 0755); err != nil {
+		return err
+	}
+
+	switch mode {
+	case testEvalSymlinksSymbolicLink:
+		return os.Symlink(linkBasePath, path)
+	case testEvalSymlinksJunction:
+		output, err := exec.Command("cmd", "/c", "mklink", "/J", path, linkBasePath).CombinedOutput()
+		if err != nil {
+			output, err := io.ReadAll(transform.NewReader(bytes.NewBuffer(output), japanese.ShiftJIS.NewDecoder()))
+			if err != nil {
+				return fmt.Errorf("failed to transform output: %w", err)
+			}
+			return fmt.Errorf("failed to create junction: %s, %w", string(output), err)
+		}
+		return nil
+	}
+	return nil
+}

local_repository.go

@@ -399,7 +399,7 @@ func localRepositoryRoots(all bool) ([]string, error) {
 		for _, v := range roots {
 			path := filepath.Clean(v)
 			if _, err := os.Stat(path); err == nil {
-				if path, err = filepath.EvalSymlinks(path); err != nil {
+				if path, err = evalSymlinks(path); err != nil {
 					_localRepoErr = err
 					return
 				}