Internal improvements

go.mod

@@ -2,4 +2,4 @@ module github.com/adrg/xdg
 
 go 1.14
 
-require github.com/stretchr/testify v1.6.1
+require github.com/stretchr/testify v1.7.0

go.sum

@@ -2,9 +2,10 @@ github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
-github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=

paths_plan9.go

@@ -1,5 +1,3 @@
-// +build plan9
-
 package xdg
 
 import (

paths_unix.go

@@ -1,4 +1,4 @@
-// +build aix dragonfly freebsd linux nacl netbsd openbsd solaris
+// +build aix dragonfly freebsd js,wasm nacl linux netbsd openbsd solaris
 
 package xdg
 

paths_unix_test.go

@@ -1,4 +1,4 @@
-// +build aix dragonfly freebsd linux nacl netbsd openbsd solaris
+// +build aix dragonfly freebsd js,wasm nacl linux netbsd openbsd solaris
 
 package xdg_test
 

paths_windows_test.go

@@ -9,7 +9,7 @@ import (
 	"testing"
 
 	"github.com/adrg/xdg"
-	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestDefaultBaseDirs(t *testing.T) {
@@ -74,30 +74,30 @@ func TestDefaultBaseDirs(t *testing.T) {
 	}
 
 	// Test environment variable fallbacks.
-	assert.NoError(t, os.Unsetenv("APPDATA"))
-	assert.NoError(t, os.Unsetenv("LOCALAPPDATA"))
-	assert.NoError(t, os.Unsetenv("PROGRAMDATA"))
-	assert.NoError(t, os.Unsetenv("windir"))
-	assert.NoError(t, os.Setenv("SystemDrive", home))
-	assert.NoError(t, os.Setenv("SystemRoot", winDir))
+	require.NoError(t, os.Unsetenv("APPDATA"))
+	require.NoError(t, os.Unsetenv("LOCALAPPDATA"))
+	require.NoError(t, os.Unsetenv("PROGRAMDATA"))
+	require.NoError(t, os.Unsetenv("windir"))
+	require.NoError(t, os.Setenv("SystemDrive", home))
+	require.NoError(t, os.Setenv("SystemRoot", winDir))
 
 	testDirs(t, envSamples...)
 
 	// Test environment variables set.
-	assert.NoError(t, os.Setenv("APPDATA", appData))
-	assert.NoError(t, os.Setenv("LOCALAPPDATA", localAppData))
-	assert.NoError(t, os.Setenv("PROGRAMDATA", programData))
-	assert.NoError(t, os.Setenv("windir", winDir))
+	require.NoError(t, os.Setenv("APPDATA", appData))
+	require.NoError(t, os.Setenv("LOCALAPPDATA", localAppData))
+	require.NoError(t, os.Setenv("PROGRAMDATA", programData))
+	require.NoError(t, os.Setenv("windir", winDir))
 
 	testDirs(t, envSamples...)
 
 	// Test no environment variables set.
-	assert.NoError(t, os.Unsetenv("APPDATA"))
-	assert.NoError(t, os.Unsetenv("LOCALAPPDATA"))
-	assert.NoError(t, os.Unsetenv("PROGRAMDATA"))
-	assert.NoError(t, os.Unsetenv("windir"))
-	assert.NoError(t, os.Unsetenv("SystemDrive"))
-	assert.NoError(t, os.Unsetenv("SystemRoot"))
+	require.NoError(t, os.Unsetenv("APPDATA"))
+	require.NoError(t, os.Unsetenv("LOCALAPPDATA"))
+	require.NoError(t, os.Unsetenv("PROGRAMDATA"))
+	require.NoError(t, os.Unsetenv("windir"))
+	require.NoError(t, os.Unsetenv("SystemDrive"))
+	require.NoError(t, os.Unsetenv("SystemRoot"))
 
 	envSamples[1].expected = []string{roamingAppData, home}
 	envSamples[3].expected = []string{home}
@@ -115,9 +115,9 @@ func TestCustomBaseDirs(t *testing.T) {
 	localAppData := filepath.Join(appData, "Local")
 	programData := filepath.Join(home, "ProgramData")
 
-	assert.NoError(t, os.Setenv("APPDATA", appData))
-	assert.NoError(t, os.Setenv("LOCALAPPDATA", localAppData))
-	assert.NoError(t, os.Setenv("PROGRAMDATA", programData))
+	require.NoError(t, os.Setenv("APPDATA", appData))
+	require.NoError(t, os.Setenv("LOCALAPPDATA", localAppData))
+	require.NoError(t, os.Setenv("PROGRAMDATA", programData))
 
 	testDirs(t,
 		&envSample{
@@ -213,11 +213,11 @@ func TestDefaultUserDirs(t *testing.T) {
 	}
 
 	// Test %PUBLIC% not set.
-	assert.NoError(t, os.Unsetenv("PUBLIC"))
+	require.NoError(t, os.Unsetenv("PUBLIC"))
 	testDirs(t, samples...)
 
 	// Test %PUBLIC% set.
-	assert.NoError(t, os.Setenv("PUBLIC", public))
+	require.NoError(t, os.Setenv("PUBLIC", public))
 	testDirs(t, samples...)
 }
 

stat.go

@@ -0,0 +1,10 @@
+// +build !windows
+
+package xdg
+
+import "os"
+
+func pathExists(path string) bool {
+	_, err := os.Stat(path)
+	return err == nil || os.IsExist(err)
+}

stat_windows.go

@@ -0,0 +1,15 @@
+package xdg
+
+import (
+	"os"
+	"path/filepath"
+)
+
+func pathExists(path string) bool {
+	fi, err := os.Lstat(path)
+	if fi != nil && fi.Mode()&os.ModeSymlink != 0 {
+		_, err = filepath.EvalSymlinks(path)
+	}
+
+	return err == nil || os.IsExist(err)
+}

utils.go

@@ -33,11 +33,6 @@ func homeDir() string {
 	return ""
 }
 
-func exists(path string) bool {
-	_, err := os.Stat(path)
-	return err == nil || os.IsExist(err)
-}
-
 func expandPath(path, homeDir string) string {
 	if path == "" || homeDir == "" {
 		return path
@@ -58,7 +53,7 @@ func createPath(name string, paths []string) (string, error) {
 		path := filepath.Join(p, name)
 		dir := filepath.Dir(path)
 
-		if exists(dir) {
+		if pathExists(dir) {
 			return path, nil
 		}
 		if err := os.MkdirAll(dir, os.ModeDir|0700); err == nil {
@@ -76,7 +71,7 @@ func searchFile(name string, paths []string) (string, error) {
 	var searchedPaths []string
 	for _, p := range paths {
 		path := filepath.Join(p, name)
-		if exists(path) {
+		if pathExists(path) {
 			return path, nil
 		}
 

xdg_test.go

@@ -2,10 +2,11 @@ package xdg_test
 
 import (
 	"os"
+	"path/filepath"
 	"testing"
 
 	"github.com/adrg/xdg"
-	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 type envSample struct {
@@ -17,14 +18,12 @@ type envSample struct {
 
 func testDirs(t *testing.T, samples ...*envSample) {
 	// Test home directory.
-	if !assert.NotEmpty(t, xdg.Home) {
-		t.FailNow()
-	}
+	require.NotEmpty(t, xdg.Home)
 	t.Logf("Home: %s", xdg.Home)
 
 	// Set environment variables.
 	for _, sample := range samples {
-		assert.NoError(t, os.Setenv(sample.name, sample.value))
+		require.NoError(t, os.Setenv(sample.name, sample.value))
 	}
 	xdg.Reload()
 
@@ -38,19 +37,19 @@ func testDirs(t *testing.T, samples ...*envSample) {
 			actual = *v
 		}
 
-		assert.Equal(t, sample.expected, actual)
+		require.Equal(t, sample.expected, actual)
 		t.Logf("%s: %v", sample.name, actual)
 	}
 }
 
-func TestBaseDirFuncs(t *testing.T) {
-	type inputData struct {
-		relPaths   []string
-		pathFunc   func(string) (string, error)
-		searchFunc func(string) (string, error)
-	}
+type testInputData struct {
+	relPaths   []string
+	pathFunc   func(string) (string, error)
+	searchFunc func(string) (string, error)
+}
 
-	inputs := []*inputData{
+func TestBaseDirFuncs(t *testing.T) {
+	inputs := []*testInputData{
 		{
 			relPaths:   []string{"app.data", "appname/app.data"},
 			pathFunc:   xdg.DataFile,
@@ -78,33 +77,93 @@ func TestBaseDirFuncs(t *testing.T) {
 		},
 	}
 
+	// Test base directories for regular files.
+	testBaseDirsRegular(t, inputs)
+
+	// Test base directories for symbolic links.
+	for _, input := range inputs {
+		input.relPaths = []string{input.relPaths[1]}
+	}
+
+	testBaseDirsSymlinks(t, inputs)
+}
+
+func testBaseDirsRegular(t *testing.T, inputs []*testInputData) {
 	for _, input := range inputs {
 		for _, relPath := range input.relPaths {
 			// Get suitable path for input file.
 			expFullPath, err := input.pathFunc(relPath)
-			assert.NoError(t, err)
+			require.NoError(t, err)
 
 			// Create input file.
 			f, err := os.Create(expFullPath)
-			assert.NoError(t, err)
-			assert.NoError(t, f.Close())
+			require.NoError(t, err)
+			require.NoError(t, f.Close())
 
 			// Search input file after creation.
 			actFullPath, err := input.searchFunc(relPath)
-			assert.NoError(t, err)
-			assert.Equal(t, expFullPath, actFullPath)
+			require.NoError(t, err)
+			require.Equal(t, expFullPath, actFullPath)
 
 			// Remove created file.
-			assert.NoError(t, os.Remove(expFullPath))
+			require.NoError(t, os.Remove(expFullPath))
+
+			// Search input file after removal.
+			_, err = input.searchFunc(relPath)
+			require.Error(t, err)
+
+			// Check that the same path is returned.
+			actFullPath, err = input.pathFunc(relPath)
+			require.NoError(t, err)
+			require.Equal(t, expFullPath, actFullPath)
+		}
+	}
+}
+
+func testBaseDirsSymlinks(t *testing.T, inputs []*testInputData) {
+	for _, input := range inputs {
+		for _, relPath := range input.relPaths {
+			// Get suitable path for input file.
+			expFullPath, err := input.pathFunc(relPath)
+			require.NoError(t, err)
+
+			// Replace input directory with symlink.
+			symlinkDir := filepath.Dir(expFullPath)
+			inputDir := filepath.Join(filepath.Dir(symlinkDir), "inputdir")
+
+			require.NoError(t, os.Remove(symlinkDir))
+			require.NoError(t, os.Mkdir(inputDir, os.ModeDir|0700))
+			require.NoError(t, os.Symlink(inputDir, symlinkDir))
+
+			// Create input file.
+			inputPath := filepath.Join(symlinkDir, "input.file")
+
+			f, err := os.Create(inputPath)
+			require.NoError(t, err)
+			require.NoError(t, f.Close())
+
+			// Create symbolic link.
+			require.NoError(t, os.Symlink(inputPath, expFullPath))
+
+			// Search input file after creation.
+			actFullPath, err := input.searchFunc(relPath)
+			require.NoError(t, err)
+			require.Equal(t, expFullPath, actFullPath)
+
+			// Remove created symbolic links, files and directories.
+			require.NoError(t, os.Remove(expFullPath))
+			require.NoError(t, os.Remove(inputPath))
+			require.NoError(t, os.Remove(symlinkDir))
+			require.NoError(t, os.Remove(inputDir))
 
 			// Search input file after removal.
 			_, err = input.searchFunc(relPath)
-			assert.Error(t, err)
+			require.Error(t, err)
 
 			// Check that the same path is returned.
 			actFullPath, err = input.pathFunc(relPath)
-			assert.NoError(t, err)
-			assert.Equal(t, expFullPath, actFullPath)
+			require.NoError(t, err)
+			require.Equal(t, expFullPath, actFullPath)
 		}
 	}
 }