feat: XDG taskrc config (#2380)

Co-authored-by: Valentin Maerten <maerten.valentin@gmail.com>

taskrc/taskrc_test.go

@@ -0,0 +1,137 @@
+package taskrc
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/go-task/task/v3/taskrc/ast"
+)
+
+const (
+	xdgConfigYAML = `
+experiments:
+  FOO: 1
+  BAR: 1
+  BAZ: 1
+`
+
+	homeConfigYAML = `
+experiments:
+  FOO: 2
+  BAR: 2
+`
+
+	localConfigYAML = `
+experiments:
+  FOO: 3
+`
+)
+
+func setupDirs(t *testing.T) (string, string, string) {
+	t.Helper()
+
+	xdgConfigDir := t.TempDir()
+	xdgTaskConfigDir := filepath.Join(xdgConfigDir, "task")
+	require.NoError(t, os.Mkdir(xdgTaskConfigDir, 0o755))
+
+	homeDir := t.TempDir()
+
+	localDir := filepath.Join(homeDir, "local")
+	require.NoError(t, os.Mkdir(localDir, 0o755))
+
+	t.Setenv("XDG_CONFIG_HOME", xdgConfigDir)
+	t.Setenv("HOME", homeDir)
+
+	return xdgTaskConfigDir, homeDir, localDir
+}
+
+func writeFile(t *testing.T, dir, filename, content string) {
+	t.Helper()
+	err := os.WriteFile(filepath.Join(dir, filename), []byte(content), 0o644)
+	assert.NoError(t, err)
+}
+
+func TestGetConfig_NoConfigFiles(t *testing.T) { //nolint:paralleltest // cannot run in parallel
+	_, _, localDir := setupDirs(t)
+
+	cfg, err := GetConfig(localDir)
+	assert.NoError(t, err)
+	assert.Nil(t, cfg)
+}
+
+func TestGetConfig_OnlyXDG(t *testing.T) { //nolint:paralleltest // cannot run in parallel
+	xdgDir, _, localDir := setupDirs(t)
+
+	writeFile(t, xdgDir, ".taskrc.yml", xdgConfigYAML)
+
+	cfg, err := GetConfig(localDir)
+	assert.NoError(t, err)
+	assert.Equal(t, &ast.TaskRC{
+		Version: nil,
+		Experiments: map[string]int{
+			"FOO": 1,
+			"BAR": 1,
+			"BAZ": 1,
+		},
+	}, cfg)
+}
+
+func TestGetConfig_OnlyHome(t *testing.T) { //nolint:paralleltest // cannot run in parallel
+	_, homeDir, localDir := setupDirs(t)
+
+	writeFile(t, homeDir, ".taskrc.yml", homeConfigYAML)
+
+	cfg, err := GetConfig(localDir)
+	assert.NoError(t, err)
+	assert.Equal(t, &ast.TaskRC{
+		Version: nil,
+		Experiments: map[string]int{
+			"FOO": 2,
+			"BAR": 2,
+		},
+	}, cfg)
+}
+
+func TestGetConfig_OnlyLocal(t *testing.T) { //nolint:paralleltest // cannot run in parallel
+	_, _, localDir := setupDirs(t)
+
+	writeFile(t, localDir, ".taskrc.yml", localConfigYAML)
+
+	cfg, err := GetConfig(localDir)
+	assert.NoError(t, err)
+	assert.Equal(t, &ast.TaskRC{
+		Version: nil,
+		Experiments: map[string]int{
+			"FOO": 3,
+		},
+	}, cfg)
+}
+
+func TestGetConfig_All(t *testing.T) { //nolint:paralleltest // cannot run in parallel
+	xdgConfigDir, homeDir, localDir := setupDirs(t)
+
+	// Write local config
+	writeFile(t, localDir, ".taskrc.yml", localConfigYAML)
+
+	// Write home config
+	writeFile(t, homeDir, ".taskrc.yml", homeConfigYAML)
+
+	// Write XDG config
+	writeFile(t, xdgConfigDir, ".taskrc.yml", xdgConfigYAML)
+
+	cfg, err := GetConfig(localDir)
+	assert.NoError(t, err)
+	assert.NotNil(t, cfg)
+	assert.Equal(t, &ast.TaskRC{
+		Version: nil,
+		Experiments: map[string]int{
+			"FOO": 3,
+			"BAR": 2,
+			"BAZ": 1,
+		},
+	}, cfg)
+}