add support for co-authored-by

Co-authored-by: nobody <nobody@nowhere>

Author: addaleax

README.md

@@ -37,6 +37,7 @@ Commit object properties:
 * `author`: an object representing the author of the commit
   - `name`: the name of the committer
   - `email`: the email of the committer
+* `authors`: a list of such objects representing the authors of the commit, supporting multiple authors through `Co-authored-by:`
 * `authorDate`: a string representing the date of the original commit by the author (never change)
 * `commitDate`: a string representing the date of the last change of the commit
 * `summary`: the one-line summary of the commit

commit-stream.js

@@ -23,19 +23,21 @@ function commitStream (ghUser, ghProject) {
       commit = {
         sha: line.split(' ')[1]
       }
-    } else if (m = line.match(/^CommitDate: (.*)$/)) {
+    } else if (m = line.match(/^CommitDate:\s+(.*)$/)) {
       if (!commit)
         throw new Error('wut?')
       commit.commitDate = m[1].trim()
-    } else if (m = line.match(/^Author: ([^<]+) <([^>]+)>$/)) {
+    } else if (m = line.match(/^\s*(?:Author|Co[- ]?authored[- ]?by):?\s*([^<]+) <([^>]+)>\s*$/i)) {
       if (!commit)
         throw new Error('wut?')
-      commit.author = { name: m[1], email: m[2] }
-    } else if (m = line.match(/^AuthorDate: (.*)$/)) {
+      if (!commit.authors)
+        commit.authors = []
+      commit.authors.push({ name: m[1], email: m[2] })
+    } else if (m = line.match(/^AuthorDate:\s+(.*)$/)) {
       if (!commit)
         throw new Error('wut?')
       commit.authorDate = m[1].trim()
-    } else if (m = line.match(/^Date: (.*)$/)) {
+    } else if (m = line.match(/^Date:\s+(.*)$/)) {
       if (!commit)
         throw new Error('wut?')
       commit.authorDate = m[1].trim()
@@ -76,12 +78,16 @@ function commitStream (ghUser, ghProject) {
 
   function onLine (line, _, callback) {
     var commit = addLine(line)
+    if (commit && commit.authors && commit.authors.length > 0)
+      commit.author = commit.authors[0]
     if (commit)
       this.push(commit)
     callback()
   }
 
   function onEnd (callback) {
+    if (commit && commit.authors && commit.authors.length > 0)
+      commit.author = commit.authors[0]
     if (commit)
       this.push(commit)
     callback()

test.js

@@ -20,6 +20,7 @@ test('current plain commit log', function (t) {
 
     t.deepEqual(list[list.length - 9], {
         author      : { email: 'ralphtheninja@riseup.net', name: 'Lars-Magnus Skog' }
+      , authors     : [ { email: 'ralphtheninja@riseup.net', name: 'Lars-Magnus Skog' } ]
       , authorDate  : 'Tue Feb 9 15:46:46 2016 +0100'
       , description : [
             'Fixes: https://github.com/rvagg/changelog-maker/issues/35'
@@ -35,13 +36,15 @@ test('current plain commit log', function (t) {
 
     t.deepEqual(list[list.length - 4], {
         author: { email: 'rod@vagg.org', name: 'Rod Vagg' }
+      , authors: [ { email: 'rod@vagg.org', name: 'Rod Vagg' } ]
       , authorDate: 'Fri Apr 17 11:16:51 2015 +1000'
       , sha: 'f92b93c3c7175b07f847dd45058b121cea6b3a20'
       , summary: 'deleted package.json line'
     }, 'got correct fourth commit')
 
     t.deepEqual(list[list.length - 3], {
         author: { email: 'rod@vagg.org', name: 'Rod Vagg' }
+      , authors: [ { email: 'rod@vagg.org', name: 'Rod Vagg' } ]
       , authorDate: 'Fri Apr 17 11:13:06 2015 +1000'
       , description: [ 'comment', 'Reviewed-By: Nobody' ]
       , sha: 'db34ce2af09a6a9fb70241d43965a2bc48b90b4c'
@@ -50,6 +53,7 @@ test('current plain commit log', function (t) {
 
     t.deepEqual(list[list.length - 2], {
         author      : { email: 'rod@vagg.org', name: 'Rod Vagg' }
+      , authors     : [ { email: 'rod@vagg.org', name: 'Rod Vagg' } ]
       , authorDate: 'Fri Apr 17 10:52:16 2015 +1000'
       , description : [
             'Some extra summary information here'
@@ -69,9 +73,21 @@ test('current plain commit log', function (t) {
         sha    : 'd94841274e2979e7758413a0f48fa37560d0dde6'
       , authorDate: 'Thu Apr 16 20:49:21 2015 +1000'
       , author : { name: 'Rod Vagg', email: 'rod@vagg.org' }
+      , authors: [ { email: 'rod@vagg.org', name: 'Rod Vagg' } ]
       , summary: 'make it so'
     }, 'got correct first commit')
 
+    t.deepEqual(list[list.length - 16], {
+        sha    : list[list.length - 16].sha  // unknown at time of writing :)
+      , authorDate: 'Tue Jun 12 23:41:35 2018 +0200'
+      , author : { name: 'Anna Henningsen', email: 'anna@addaleax.net' }
+      , authors: [
+          { name: 'Anna Henningsen', email: 'anna@addaleax.net' }
+        , { name: 'nobody', email: 'nobody@nowhere' }
+      ]
+      , summary: 'add support for co-authored-by'
+    }, 'got correct co-authored-by commit')
+
     t.end()
   })
 })