rename: rebrand to mire

internal/mire/testdir.go

@@ -0,0 +1,75 @@
+package mire
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+
+	mireconfig "mire/internal/config"
+)
+
+// ResolveTestDir resolves the project test directory from config.
+func ResolveTestDir() (string, error) {
+	root, err := currentProjectRoot()
+	if err != nil {
+		return "", err
+	}
+
+	return resolveTestDirFromRoot(root)
+}
+
+func resolveTestDirFromRoot(root string) (string, error) {
+	cfg, err := readConfigFromRoot(root)
+	if err != nil {
+		return "", err
+	}
+
+	return resolveTestDirFromConfig(root, cfg)
+}
+
+func readConfigFromRoot(root string) (mireconfig.Config, error) {
+	configPath := filepath.Join(root, "mire.toml")
+	return mireconfig.ReadConfig(configPath)
+}
+
+func resolveTestDirFromConfig(root string, cfg mireconfig.Config) (string, error) {
+	testDir := filepath.Join(root, cfg.TestDir)
+	info, err := os.Stat(testDir)
+	if err == nil {
+		if !info.IsDir() {
+			return "", fmt.Errorf("configured test_dir is not a directory: %s", testDir)
+		}
+		return testDir, nil
+	}
+	if !errors.Is(err, os.ErrNotExist) {
+		return "", fmt.Errorf("failed to check test directory %s: %v", testDir, err)
+	}
+
+	return testDir, nil
+}
+
+func currentProjectRoot() (string, error) {
+	cwd, err := os.Getwd()
+	if err != nil {
+		return "", fmt.Errorf("failed to get working directory: %v", err)
+	}
+
+	return projectRoot(cwd), nil
+}
+
+// returns the git root if in a git repo else current pwd
+func projectRoot(cwd string) string {
+	out, err := exec.Command("git", "-C", cwd, "rev-parse", "--show-toplevel").CombinedOutput()
+	if err != nil {
+		return cwd
+	}
+
+	root := strings.TrimSpace(string(out))
+	if root == "" {
+		return cwd
+	}
+	return filepath.Clean(root)
+}