fix(changelog): create changelog file in the top level git directory …

…instead of current directory

Closes: #2

internal/cmd/cmd.go

@@ -99,6 +99,15 @@ func (c Command) Run() error {
 		return err
 	}
 
+	toplevelDir, err := gitCmd.TopLevelDir()
+	if err != nil {
+		return err
+	}
+
+	// resolv changelog file path
+	absChangelogPath := filepath.Join(toplevelDir, *c.file)
+	c.file = &absChangelogPath
+
 	gitCmd.Noop = c.noop
 
 	if err := c.validate(); err != nil {

internal/cmd/cmd_test.go

@@ -135,7 +135,7 @@ func setup(t *testing.T, repoName string) (c Command, changelogPath string, clea
 		history:    newBoolPtr(false),
 		noPrompt:   newBoolPtr(true),
 		toStdOut:   newBoolPtr(false),
-		file:       newStrPtr(filepath.Join(tmp, repoName, dfltChangelogFile)),
+		file:       newStrPtr(dfltChangelogFile),
 		version:    newBoolPtr(false),
 		num:        newIntPtr(0),
 		sinceTag:   newStrPtr(""),

internal/git/git.go

@@ -199,6 +199,16 @@ func (c Command) HasTags() (bool, error) {
 	return strings.TrimSpace(out) != "", nil
 }
 
+// TopLevelDir returns the git top level directory.
+func (c Command) TopLevelDir() (string, error) {
+	topLevelDir, err := c.Run("rev-parse", "--show-toplevel")
+	if err != nil {
+		return "", err
+	}
+
+	return strings.TrimSpace(topLevelDir), nil
+}
+
 // CommitFor creates a Commit for a revision.
 func (c Command) CommitFor(revision string) (*Commit, error) {
 	m, err := c.Run("show", "--format=%B", "-s", revision)