bluecodex/src/git/get-current-git-ref.ts

Turn repetitive dev tasks into CLI commands with Typescript

import which from "which";

import { run } from "../run/run";

export type GitRefData = Awaited<ReturnType<typeof getCurrentGitRef>>;

export async function getCurrentGitRef() {
  try {
    const hasGit = await which("git", { nothrow: true });
    if (!hasGit) return { type: "git-cli-unavailable" } as const;

    const { stdout } = await run.withOutput("git symbolic-ref --short HEAD");
    return { type: "branch", name: stdout.trim() } as const;
  } catch {
    try {
      // Not in a git branch, check if in a detached head
      const { stdout } = await run.withOutput("git rev-parse --short HEAD");

      return { type: "detached-head", commit: stdout.trim() } as const;
    } catch {
      return { type: "not-a-git-repo" } as const;
    }
  }
}