Remove repetition from distribution branch tasks.

Gruntfile.coffee

@@ -139,54 +139,39 @@ module.exports = (grunt) ->
           git checkout gh-pages
           git pull
         """.split('\n').join('&&')
-      beta:
+      'tag-beta':
         command: """
           git tag -af beta -m "<%= pkg.meta.name %> v<%= pkg.meta.version %>."
-          cd ..
+        """.split('\n').join('&&')
-          cd "<%= pkg.meta.path %>.gh-pages"
+      beta:
-          git checkout gh-pages
+        command: """
-          git pull
           git merge --no-commit -s ours beta
           git checkout beta "builds/*<%= pkg.meta.suffix.beta %>.*" LICENSE CHANGELOG.md img .gitignore .gitattributes
           git commit -am "Move <%= pkg.meta.name %> v<%= pkg.meta.version %> to beta channel."
-          cd ..
-          cd "<%= pkg.meta.path %>"
         """.split('\n').join('&&')
-      stable:
+      'tag-stable':
         command: """
           git push . HEAD:bstable
           git tag -af stable -m "<%= pkg.meta.name %> v<%= pkg.meta.version %>."
-          cd ..
+        """.split('\n').join('&&')
-          cd "<%= pkg.meta.path %>.gh-pages"
+      stable:
-          git checkout gh-pages
+        command: """
-          git pull
           git merge --no-commit -s ours stable
           git checkout stable "builds/<%= pkg.name %>.*" builds/updates.xml
           git commit -am "Move <%= pkg.meta.name %> v<%= pkg.meta.version %> to stable channel."
-          cd ..
-          cd "<%= pkg.meta.path %>"
         """.split('\n').join('&&')
       'commit-web':
         command: 'git commit -am "Build web page."'
       web:
         command: """
-          cd ..
-          cd "<%= pkg.meta.path %>.gh-pages"
-          git checkout gh-pages
-          git pull
           git merge --no-commit -s ours -
           git checkout - README.md index.html web.css img
           git commit -am "Update web page."
-          cd ..
-          cd "<%= pkg.meta.path %>"
         """.split('\n').join('&&')
       push:
         command: 'git push origin --tags -f && git push origin --all'
       aws:
         command: """
-          cd ..
-          cd "<%= pkg.meta.path %>.gh-pages"
-          git checkout gh-pages
           aws s3 cp builds/ s3://<%= pkg.meta.awsBucket %>/builds/ --recursive --exclude "*" --include "*.js" --cache-control "max-age=600" --content-type "application/javascript; charset=utf-8"
           aws s3 cp builds/ s3://<%= pkg.meta.awsBucket %>/builds/ --recursive --exclude "*" --include "*.crx" --cache-control "max-age=600" --content-type "application/x-chrome-extension"
           aws s3 cp builds/ s3://<%= pkg.meta.awsBucket %>/builds/ --recursive --exclude "*" --include "*.xml" --cache-control "max-age=600" --content-type "text/xml; charset=utf-8"
@@ -194,8 +179,6 @@ module.exports = (grunt) ->
           aws s3 cp img/ s3://<%= pkg.meta.awsBucket %>/img/ --recursive --cache-control "max-age=600"
           aws s3 cp index.html s3://<%= pkg.meta.awsBucket %> --cache-control "max-age=600" --content-type "text/html; charset=utf-8"
           aws s3 cp web.css s3://<%= pkg.meta.awsBucket %> --cache-control "max-age=600" --content-type "text/css; charset=utf-8"
-          cd ..
-          cd "<%= pkg.meta.path %>"
         """.split('\n').join('&&')
       captchas:
         command: 'aws s3 cp captchas.html s3://<%= pkg.meta.awsBucket %> --cache-control "max-age=0" --content-type "text/html; charset=utf-8"'
@@ -417,11 +400,17 @@ module.exports = (grunt) ->
     grunt.file.setBase "../#{pkg.meta.path}"
 
   grunt.registerTask 'beta', [
+    'shell:tag-beta'
+    'pushd'
     'shell:beta'
+    'popd'
   ]
 
   grunt.registerTask 'stable', [
+    'shell:tag-stable'
+    'pushd'
     'shell:stable'
+    'popd'
   ]
 
   grunt.registerTask 'web', 'Move website changes to gh-pages.', ->
@@ -431,14 +420,20 @@ module.exports = (grunt) ->
         'copy:web'
         'shell:commit-web'
       ]
-    grunt.task.run 'shell:web'
+    grunt.task.run [
+      'pushd'
+      'shell:web'
+      'popd'
+    ]
 
   grunt.registerTask 'push', [
     'shell:push'
   ]
 
   grunt.registerTask 'aws', [
+    'pushd'
     'shell:aws'
+    'popd'
   ]
 
   grunt.registerTask 'store', [