Initial commit

internal/validation/validation.go

@@ -0,0 +1,62 @@
+package validation
+
+import (
+	"os"
+	"os/exec"
+	"path/filepath"
+	"regexp"
+
+	"github.com/ivuorinen/gh-action-readme/internal/git"
+)
+
+// IsCommitSHA checks if a version string is a commit SHA.
+func IsCommitSHA(version string) bool {
+	// Check if it's a 40-character hex string (full SHA) or 7+ character hex (short SHA)
+	re := regexp.MustCompile(`^[a-f0-9]{7,40}$`)
+	return len(version) >= 7 && re.MatchString(version)
+}
+
+// IsSemanticVersion checks if a version string follows semantic versioning.
+func IsSemanticVersion(version string) bool {
+	// Check for vX.Y.Z format (requires major.minor.patch)
+	re := regexp.MustCompile(`^v?\d+\.\d+\.\d+(-[a-zA-Z0-9.-]+)?(\+[a-zA-Z0-9.-]+)?$`)
+	return re.MatchString(version)
+}
+
+// IsVersionPinned checks if a semantic version is pinned to a specific version.
+func IsVersionPinned(version string) bool {
+	// Consider it pinned if it specifies patch version (v1.2.3) or is a commit SHA
+	if IsSemanticVersion(version) {
+		return true
+	}
+	return IsCommitSHA(version) && len(version) == 40 // Only full SHAs are considered pinned
+}
+
+// ValidateGitBranch checks if a branch exists in the given repository.
+func ValidateGitBranch(repoRoot, branch string) bool {
+	cmd := exec.Command("git", "show-ref", "--verify", "--quiet", "refs/heads/"+branch)
+	cmd.Dir = repoRoot
+	return cmd.Run() == nil
+}
+
+// ValidateActionYMLPath validates that a path points to a valid action.yml file.
+func ValidateActionYMLPath(path string) error {
+	// Check if file exists
+	if _, err := os.Stat(path); os.IsNotExist(err) {
+		return err
+	}
+
+	// Check if it's an action.yml or action.yaml file
+	filename := filepath.Base(path)
+	if filename != "action.yml" && filename != "action.yaml" {
+		return os.ErrInvalid
+	}
+
+	return nil
+}
+
+// IsGitRepository checks if the given path is within a git repository.
+func IsGitRepository(path string) bool {
+	_, err := git.FindRepositoryRoot(path)
+	return err == nil
+}