Detect the tag of the current commit

Author: cibernox

index.js

@@ -35,7 +35,8 @@ module.exports = function(gitPath) {
   var result = {
     sha: null,
     abbreviatedSha: null,
-    branch: null
+    branch: null,
+    tag: null
   }
 
   try {
@@ -47,6 +48,7 @@ module.exports = function(gitPath) {
       var branchName = headFile.split('/').slice(-1)[0].trim();
       var refPath = headFile.split(' ')[1];
 
+      // Find branch and SHA
       if (refPath) {
         var branchPath = path.join(gitPath, refPath.trim());
 
@@ -57,6 +59,18 @@ module.exports = function(gitPath) {
       }
 
       result.abbreviatedSha = result.sha.slice(0,10);
+
+      // Find tag
+      var packedRefsFilePath = path.join(gitPath, 'packed-refs');
+      if (fs.existsSync(packedRefsFilePath)) {
+        var packedRefsFile = fs.readFileSync(packedRefsFilePath, {encoding: 'utf8'});
+        var tagLine = packedRefsFile.split('\n').filter(function(l) {
+          return l.indexOf("refs/tags") > -1 && l.indexOf(result.sha) > -1;
+        })[0];
+        if (tagLine) {
+          result.tag = tagLine.split('tags/')[1]
+        }
+      }
     }
   } catch (e) {
     // eat it
@@ -66,4 +80,4 @@ module.exports = function(gitPath) {
 };
 
 module.exports._findRepo     = findRepo;
-module.exports._changeGitDir = changeGitDir;
+module.exports._changeGitDir = changeGitDir;

tests/fixtures/tagged-commit/dot-git/HEAD

@@ -0,0 +1 @@
+ref: refs/heads/master

tests/fixtures/tagged-commit/dot-git/packed-refs

@@ -0,0 +1,4 @@
+5359aabd3872d9ffd160712e9615c5592dfe6745 refs/remotes/origin/master
+c76753aa8651471fe082a3ecd0790ec54f5ec673 refs/tags/v1.0.0
+5359aabd3872d9ffd160712e9615c5592dfe6745 refs/tags/my-tag
+6f2abfab299ad8e302f3a3023f88483f4be3b402 refs/tags/v1.0.1

tests/fixtures/tagged-commit/dot-git/refs/heads/master

@@ -0,0 +1 @@
+5359aabd3872d9ffd160712e9615c5592dfe6745

tests/index.js

@@ -57,7 +57,8 @@ describe('git-repo-info', function() {
       var expected = {
         branch: 'master',
         sha: '5359aabd3872d9ffd160712e9615c5592dfe6745',
-        abbreviatedSha: '5359aabd38'
+        abbreviatedSha: '5359aabd38',
+        tag: null
       }
 
       assert.deepEqual(result, expected);
@@ -70,7 +71,23 @@ describe('git-repo-info', function() {
       var expected = {
         branch: null,
         sha: '9dac893d5a83c02344d91e79dad8904889aeacb1',
-        abbreviatedSha: '9dac893d5a'
+        abbreviatedSha: '9dac893d5a',
+        tag: null
+      }
+
+      assert.deepEqual(result, expected);
+    });
+
+
+    it('returns an object with repo info, including the tag', function() {
+      var repoRoot = path.join(testFixturesPath, 'tagged-commit');
+      var result = repoInfo(path.join(repoRoot, gitDir))
+
+      var expected = {
+        branch: 'master',
+        sha: '5359aabd3872d9ffd160712e9615c5592dfe6745',
+        abbreviatedSha: '5359aabd38',
+        tag: 'my-tag'
       }
 
       assert.deepEqual(result, expected);