Function GetFileContentFromCommit

vcs/git/git_diff.go:360–380

GetFileContentFromCommit reads the content of a file at a specific commit using 'git show commit:path'. The filePath should be relative to the repository root.

(repoPath, commitID, filePath string)

// GetFileContentFromCommit reads the content of a file at a specific commit
// using 'git show commit:path'. The filePath should be relative to the repository root.
func GetFileContentFromCommit(repoPath, commitID, filePath string) ([]byte, error) {
	if err := validateGitRef(commitID); err != nil {
		return nil, err
	}
	if err := validateGitRelPath(filePath); err != nil {
		return nil, err
	}

	// Format: commit:path
	ref := fmt.Sprintf("%s:%s", commitID, filePath)

	stdout, stderr, err := runGitCommand(repoPath, "show", ref)
	if err != nil {
		if stderr != "" {
			return nil, fmt.Errorf("git show failed: %s", stderr)
		}
		return nil, err
	}

	return stdout, nil
}

// GetCommitRangeFiles finds all files changed between two commits.
// Uses: git diff --name-only --diff-filter=d <from> <to>