feat: Implemented changedFilePattern && migrated raw Git cmds to go-git

.changesets/major-1788790888874863721.md

@@ -0,0 +1 @@
+Introduced `changedFilePattern` to allow filtering of changed files against user-defined patterns, ensuring version bumps are only triggered by relevant file modifications.

.changesets/minor-1788790839776692553.md

@@ -0,0 +1 @@
+Migrated internal Git operations from `os/exec` shell commands to the `go-git` library to make the CLI fully self-contained and cross-platform compatible.

.changesets/patch-1788520819013459586.md

@@ -1 +1 @@
-Migrate description input to chzyer/readline to fix multi-print pasting bugs, add interrupt handling for clean exits, and resolve filepath variable shadowing.
+Migrate description input to `chzyer/readline` to fix multi-print pasting bugs, add interrupt handling for clean exits, and resolve filepath variable shadowing.

changeset/changelog.go

@@ -24,8 +24,14 @@ func ApplyChangesets(cfg config.Config) (string, error) {
 
 	bumpType := determineBumpType(majors, minors, patches)
 
-	current, _ := GetLatestVersion()
-	newVersion, _ := BumpVersion(current, bumpType)
+	current, err := GetLatestVersion()
+	if err != nil {
+		return "", err
+	}
+	newVersion, err := BumpVersion(current, bumpType)
+	if err != nil {
+		return "", err
+	}
 
 	if cfg.Changelog.Enabled {
 		if err := updateChangelog(newVersion, majors, minors, patches, cfg); err != nil {

changeset/changeset.go

@@ -11,6 +11,7 @@ import (
 
 	"github.com/ChanduBobbili/changesetgoo/config"
 	"github.com/ChanduBobbili/changesetgoo/enums"
+	"github.com/ChanduBobbili/changesetgoo/utils/git"
 	"github.com/chzyer/readline"
 	"github.com/manifoldco/promptui"
 )
@@ -49,7 +50,15 @@ func AddChangeset(releaseType enums.ReleaseType, message string, cfg config.Conf
 }
 
 // InteractiveAdd allows user to input bump type and description
-func InteractiveAdd(cfg config.Config) error {
+func InteractiveAdd(gitRepo *git.GitRepository, cfg config.Config) error {
+	hasChanges, err := HasChangesForChangeset(gitRepo, cfg)
+	if err != nil {
+		return err
+	}
+	if !hasChanges {
+		return fmt.Errorf("no changes detected; nothing to add a changeset for")
+	}
+
 	bump, err := PromptReleaseType()
 	if err != nil {
 		return err

changeset/status.go

@@ -0,0 +1,155 @@
+package changeset
+
+import (
+	"fmt"
+	"os"
+	"regexp"
+	"strings"
+
+	"github.com/ChanduBobbili/changesetgoo/config"
+	"github.com/ChanduBobbili/changesetgoo/utils/git"
+)
+
+// GetChangedFiles returns the files changed between a ref and HEAD.
+func GetChangedFiles(gitRepo *git.GitRepository, ref string) ([]string, error) {
+	return gitRepo.DiffTreesFromRefs(ref, "HEAD")
+}
+
+func ResolveChangeRef(gitRepo *git.GitRepository, cfg config.Config) (string, error) {
+	branch, err := gitRepo.GetCurrentBranch()
+	if err != nil {
+		return "", err
+	}
+
+	if branch != cfg.BaseBranch {
+		return cfg.BaseBranch, nil
+	}
+
+	version, err := GetLatestVersion()
+	if err != nil {
+		return "", err
+	}
+	tag := cfg.TagPrefix + version
+
+	exists, err := gitRepo.CheckTagExists(tag)
+	if err != nil {
+		return "", fmt.Errorf("failed to check tag %s: %w", tag, err)
+	}
+	if exists {
+		return tag, nil
+	}
+
+	rootCommit, err := gitRepo.GetRootCommit()
+	if err != nil {
+		return "", fmt.Errorf("no tag %s found and failed to resolve root commit: %w", tag, err)
+	}
+	return rootCommit, nil
+}
+
+func HasChangesForChangeset(gitRepo *git.GitRepository, cfg config.Config) (bool, error) {
+	ref, err := ResolveChangeRef(gitRepo, cfg)
+	if err != nil {
+		return false, err
+	}
+	return gitRepo.HasChangesSinceRef(ref)
+}
+
+// GetRelevantChangedFiles returns changed files matching ChangedFilePatterns.
+func GetRelevantChangedFiles(gitRepo *git.GitRepository, cfg config.Config) ([]string, error) {
+	ref, err := ResolveChangeRef(gitRepo, cfg)
+	if err != nil {
+		return nil, err
+	}
+
+	files, err := GetChangedFiles(gitRepo, ref)
+	if err != nil {
+		return nil, err
+	}
+
+	relevant := make([]string, 0)
+	for _, file := range files {
+		if MatchesAnyPattern(file, cfg.ChangedFilePatterns) {
+			relevant = append(relevant, file)
+		}
+	}
+
+	return relevant, nil
+}
+
+// MatchesAnyPattern reports whether a file matches at least one pattern.
+func MatchesAnyPattern(file string, patterns []string) bool {
+	for _, pattern := range patterns {
+		if globToRegexp(pattern).MatchString(file) {
+			return true
+		}
+	}
+	return false
+}
+
+func globToRegexp(pattern string) *regexp.Regexp {
+	var b strings.Builder
+	b.WriteString("^")
+
+	for i := 0; i < len(pattern); {
+		switch {
+		case strings.HasPrefix(pattern[i:], "**"):
+			b.WriteString(".*")
+			i += 2
+		case pattern[i] == '*':
+			b.WriteString("[^/]*")
+			i++
+		case pattern[i] == '?':
+			b.WriteString(".")
+			i++
+		default:
+			b.WriteString(regexp.QuoteMeta(string(pattern[i])))
+			i++
+		}
+	}
+
+	b.WriteString("$")
+	return regexp.MustCompile(b.String())
+}
+
+// HasPendingChangesets reports whether there are any pending .md changesets.
+func HasPendingChangesets(changesDir string) (bool, error) {
+	entries, err := os.ReadDir(changesDir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return false, nil
+		}
+		return false, err
+	}
+
+	for _, entry := range entries {
+		if !entry.IsDir() && strings.HasSuffix(entry.Name(), ".md") {
+			return true, nil
+		}
+	}
+
+	return false, nil
+}
+
+// CheckChangesetRequirement enforces changedFilePatterns semantics for CI-style
+// checks. It returns whether the check passes and the relevant matched files.
+func CheckChangesetRequirement(gitRepo *git.GitRepository, cfg config.Config) (bool, []string, error) {
+	relevantFiles, err := GetRelevantChangedFiles(gitRepo, cfg)
+	if err != nil {
+		return false, nil, err
+	}
+
+	if len(relevantFiles) == 0 {
+		return true, relevantFiles, nil
+	}
+
+	hasPending, err := HasPendingChangesets(cfg.ChangesDir)
+	if err != nil {
+		return false, nil, err
+	}
+
+	if hasPending {
+		return true, relevantFiles, nil
+	}
+
+	return false, relevantFiles, nil
+}