Initial commit.

Author: rwjblue

.gitignore

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+node_modules

README.md

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+## git-repo-info
+
+Retrieves repo information.

index.js

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+'use strict';
+
+var fs   = require('fs');
+var path = require('path');
+
+var GIT_DIR = '.git';
+
+function changeGitDir(newDirName) {
+  GIT_DIR = newDirName;
+}
+
+function findRepo(startingPath) {
+  var gitPath, lastPath;
+  var currentPath = startingPath;
+
+  if (!currentPath) { currentPath = process.cwd(); }
+
+  do {
+    gitPath = path.join(currentPath, GIT_DIR);
+
+    if (fs.existsSync(gitPath)) {
+      return gitPath;
+    }
+
+    lastPath = currentPath;
+    currentPath = path.resolve(currentPath, '..');
+  } while (lastPath !== currentPath);
+
+  return null;
+}
+
+module.exports = function(gitPath) {
+  if (!gitPath) { gitPath = findRepo(); }
+
+  var headFilePath   = path.join(gitPath, 'HEAD');
+
+  var result = {
+    sha: null,
+    abbreviatedSha: null,
+    branch: null
+  }
+
+  try {
+    if (fs.existsSync(headFilePath)) {
+      var branchSHA;
+      var headFile = fs.readFileSync(headFilePath, {encoding: 'utf8'});
+      var branchName = headFile.split('/').slice(-1)[0].trim();
+      var refPath = headFile.split(' ')[1];
+
+      if (refPath) {
+        var branchPath = path.join(gitPath, refPath.trim());
+
+        result.branch  = branchName;
+        result.sha     = fs.readFileSync(branchPath, {encoding: 'utf8' }).trim();
+      } else {
+        result.sha = branchName;
+      }
+
+      result.abbreviatedSha = result.sha.slice(0,10);
+    }
+  } catch (e) {
+    // eat it
+  }
+
+  return result;
+};
+
+module.exports._findRepo     = findRepo;
+module.exports._changeGitDir = changeGitDir;

package.json

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+{
+  "name": "git-repo-info",
+  "version": "0.0.0",
+  "description": "Retrieve current sha and branch name.",
+  "main": "index.js",
+  "scripts": {
+    "test": "mocha tests"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/rwjblue/git-repo-info.git"
+  },
+  "keywords": [
+    "git"
+  ],
+  "author": "Robert Jackson",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/rwjblue/git-repo-info/issues"
+  },
+  "homepage": "https://github.com/rwjblue/git-repo-info",
+  "devDependencies": {
+    "mocha": "^1.21.4"
+  }
+}

tests/fixtures/detached-head/dot-git/HEAD

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+9dac893d5a83c02344d91e79dad8904889aeacb1

tests/fixtures/nested-repo/dot-git/.gitkeep

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+ref: refs/heads/master

tests/fixtures/nested-repo/dot-git/HEAD

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+5359aabd3872d9ffd160712e9615c5592dfe6745

tests/fixtures/nested-repo/dot-git/refs/heads/master

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+'use strict';
+
+var assert = require('assert');
+var path = require('path');
+var repoInfo = require('../index');
+
+var root = process.cwd();
+var testFixturesPath = path.join(__dirname, 'fixtures');
+var gitDir = 'dot-git';
+
+describe('git-repo-info', function() {
+  before(function() {
+    repoInfo._changeGitDir(gitDir);
+  });
+
+  afterEach(function() {
+    process.chdir(root);
+  })
+
+  describe('repo lookup', function() {
+    var repoRoot = path.join(testFixturesPath, 'nested-repo');
+
+    it('finds a repo in the current directory', function() {
+      process.chdir(repoRoot);
+
+      var foundPath = repoInfo._findRepo(repoRoot);
+      assert.equal(foundPath, path.join(repoRoot, gitDir));
+    });
+
+    it('finds a repo in the parent directory', function() {
+      process.chdir(path.join(repoRoot, 'foo'));
+
+      var foundPath = repoInfo._findRepo(repoRoot);
+      assert.equal(foundPath, path.join(repoRoot, gitDir));
+    });
+
+    it('finds a repo 2 levels up', function() {
+      process.chdir(path.join(repoRoot, 'foo', 'bar'));
+
+      var foundPath = repoInfo._findRepo(repoRoot);
+      assert.equal(foundPath, path.join(repoRoot, gitDir));
+    });
+
+    it('finds a repo without an argument', function() {
+      process.chdir(repoRoot);
+
+      var foundPath = repoInfo._findRepo();
+      assert.equal(foundPath, path.join(repoRoot, gitDir));
+    });
+  });
+
+  describe('repoInfo', function() {
+    it('returns an object with repo info', function() {
+      var repoRoot = path.join(testFixturesPath, 'nested-repo');
+      var result = repoInfo(path.join(repoRoot, gitDir))
+
+      var expected = {
+        branch: 'master',
+        sha: '5359aabd3872d9ffd160712e9615c5592dfe6745',
+        abbreviatedSha: '5359aabd38'
+      }
+
+      assert.deepEqual(result, expected);
+    });
+
+    it('returns an object with repo info', function() {
+      var repoRoot = path.join(testFixturesPath, 'detached-head');
+      var result = repoInfo(path.join(repoRoot, gitDir))
+
+      var expected = {
+        branch: null,
+        sha: '9dac893d5a83c02344d91e79dad8904889aeacb1',
+        abbreviatedSha: '9dac893d5a'
+      }
+
+      assert.deepEqual(result, expected);
+    });
+  });
+});