feat(github): adds github-specific replacements for issues and users

Closes #12

index.js

@@ -3,6 +3,17 @@ var compareFunc = require('compare-func');
 var Q = require('q');
 var readFile = Q.denodeify(require('fs').readFile);
 var resolve = require('path').resolve;
+var path = require('path');
+var pkgJson = {};
+var gufg = require('github-url-from-git');
+try {
+  pkgJson = require(path.resolve(
+    process.cwd(),
+    './package.json'
+  ));
+} catch (err) {
+  console.error('no root package.json found');
+}
 
 var parserOpts = {
   headerPattern: /^(\w*)(?:\((.*)\))?\: (.*)$/,
@@ -16,6 +27,19 @@ var parserOpts = {
   revertCorrespondence: ['header', 'hash']
 };
 
+function issueUrl() {
+  var url = null;
+  if (pkgJson.repository && pkgJson.repository.url && ~pkgJson.repository.url.indexOf('github.com')) {
+    var gitUrl = gufg(pkgJson.repository.url);
+
+    if (gitUrl) {
+      return gitUrl + '/issues/';
+    } else {
+      return url;
+    }
+  }
+}
+
 var writerOpts = {
   transform: function(commit) {
     var discard = true;
@@ -56,6 +80,13 @@ var writerOpts = {
     }
 
     if (typeof commit.subject === 'string') {
+      var url = issueUrl();
+      if (url) {
+        // GitHub issue URLs.
+        commit.subject = commit.subject.replace(/( ?)#([0-9]+)(\b|^)/g, '$1[#$2](' + url + '$2)$3');
+      }
+      // GitHub user URLs.
+      commit.subject = commit.subject.replace(/( ?)@([a-zA-Z0-9_]+)(\b|^)/g, '$1[@$2](https://github.com/$2)$3');
       commit.subject = commit.subject;
     }
 
@@ -75,6 +106,7 @@ module.exports = Q.all([
   readFile(resolve(__dirname, 'templates/footer.hbs'), 'utf-8')
 ])
   .spread(function(template, header, commit, footer) {
+
     writerOpts.mainTemplate = template;
     writerOpts.headerPartial = header;
     writerOpts.commitPartial = commit;

package.json

@@ -37,6 +37,7 @@
   },
   "dependencies": {
     "compare-func": "^1.3.1",
+    "github-url-from-git": "^1.4.0",
     "q": "^1.4.1"
   }
 }

test.js

@@ -63,6 +63,38 @@ describe('angular preset', function() {
       }));
   });
 
+  it('should replace #[0-9]+ with GitHub issue URL', function(done) {
+    gitDummyCommit(['feat(awesome): addresses the issue brought up in #133']);
+
+    conventionalChangelogCore({
+      config: preset
+    })
+      .on('error', function(err) {
+        done(err);
+      })
+      .pipe(through(function(chunk) {
+        chunk = chunk.toString();
+        expect(chunk).to.include('[#133](https://github.com/bcoe/conventional-changelog-standard/issues/133)');
+        done();
+      }));
+  });
+
+  it('should replace @username with GitHub user URL', function(done) {
+    gitDummyCommit(['feat(awesome): issue brought up by @bcoe! on Friday']);
+
+    conventionalChangelogCore({
+      config: preset
+    })
+      .on('error', function(err) {
+        done(err);
+      })
+      .pipe(through(function(chunk) {
+        chunk = chunk.toString();
+        expect(chunk).to.include('[@bcoe](https://github.com/bcoe)');
+        done();
+      }));
+  });
+
   it('should not discard commit if there is BREAKING CHANGE', function(done) {
     gitDummyCommit(['docs(readme): make it clear', 'BREAKING CHANGE: The Change is huge.']);
     gitDummyCommit(['style(whitespace): make it easier to read', 'BREAKING CHANGE: The Change is huge.']);