From 0d20ffc004d3d8e49ef07ca6d46d20630651e22b Mon Sep 17 00:00:00 2001
From: wukko <me@wukko.me>
Date: Sat, 3 Aug 2024 21:27:14 +0600
Subject: [PATCH] packages: add version-info package

---
 packages/version-info/index.d.ts   |  6 +++
 packages/version-info/index.js     | 73 ++++++++++++++++++++++++++++++
 packages/version-info/package.json | 18 ++++++++
 pnpm-workspace.yaml                |  1 +
 4 files changed, 98 insertions(+)
 create mode 100644 packages/version-info/index.d.ts
 create mode 100644 packages/version-info/index.js
 create mode 100644 packages/version-info/package.json

diff --git a/packages/version-info/index.d.ts b/packages/version-info/index.d.ts
new file mode 100644
index 00000000..a6ee9d71
--- /dev/null
+++ b/packages/version-info/index.d.ts
@@ -0,0 +1,6 @@
+declare module "@imput/version-info" {
+    export function getCommit(): Promise<string | undefined>;
+    export function getBranch(): Promise<string | undefined>;
+    export function getRemote(): Promise<string>;
+    export function getVersion(): Promise<string>;
+}
diff --git a/packages/version-info/index.js b/packages/version-info/index.js
new file mode 100644
index 00000000..0df3b855
--- /dev/null
+++ b/packages/version-info/index.js
@@ -0,0 +1,73 @@
+import { existsSync }  from 'node:fs';
+import { join, parse } from 'node:path';
+import { cwd }         from 'node:process';
+import { readFile }    from 'node:fs/promises';
+
+const findFile = (file) => {
+    let dir = cwd();
+
+    while (dir !== parse(dir).root) {
+        if (existsSync(join(dir, file))) {
+            return dir;
+        }
+
+        dir = join(dir, '../');
+    }
+}
+
+const root = findFile('.git');
+const pack = findFile('package.json');
+if (!root) {
+    throw 'no git repository root found';
+} else if (!pack) {
+    throw 'no package root found';
+}
+
+const readGit = (filename) => readFile(join(root, filename), 'utf8');
+
+export const getCommit = async () => {
+    return (await readGit('.git/logs/HEAD'))
+            ?.split('\n')
+            ?.filter(String)
+            ?.pop()
+            ?.split(' ')[1];
+}
+
+export const getBranch = async () => {
+    if (process.env.CF_PAGES_BRANCH) {
+        return process.env.CF_PAGES_BRANCH;
+    }
+
+    return (await readGit('.git/HEAD'))
+            ?.replace(/^ref: refs\/heads\//, '')
+            ?.trim();
+}
+
+export const getRemote = async () => {
+    let remote = (await readGit('.git/config'))
+                    ?.split('\n')
+                    ?.find(line => line.includes('url = '))
+                    ?.split('url = ')[1];
+
+    if (remote?.startsWith('git@')) {
+        remote = remote.split(':')[1];
+    } else if (remote?.startsWith('http')) {
+        remote = new URL(remote).pathname.substring(1);
+    }
+
+    remote = remote?.replace(/\.git$/, '');
+
+    if (!remote) {
+        throw 'could not parse remote';
+    }
+
+    return remote;
+}
+
+export const getVersion = async () => {
+    const { version } = JSON.parse(
+        await readFile(join(pack, 'package.json'), 'utf8')
+    );
+
+    return version;
+}
diff --git a/packages/version-info/package.json b/packages/version-info/package.json
new file mode 100644
index 00000000..e82a6201
--- /dev/null
+++ b/packages/version-info/package.json
@@ -0,0 +1,18 @@
+{
+    "name": "@imput/version-info",
+    "version": "1.0.0",
+    "description": "helper package for cobalt that provides commit info & version from package file.",
+    "main": "index.js",
+    "types": "index.d.ts",
+    "type": "module",
+    "repository": {
+        "type": "git",
+        "url": "git+https://github.com/imputnet/cobalt.git"
+    },
+    "author": "imput",
+    "license": "AGPL-3.0",
+    "bugs": {
+        "url": "https://github.com/imputnet/cobalt/issues"
+    },
+    "homepage": "https://github.com/imputnet/cobalt#readme"
+}
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index 8c71ee3e..d7ab6cba 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -1,3 +1,4 @@
 packages:
     - "api"
     - "web"
+    - "packages/*"