#652: Add new git_push_different_branch_names rule

Fix #652

* Basic fix for #652
* Finishing work
* Added readme line
* Added test
* My test was stupid...
* Removed redundant lines
* That space...

README.md

@@ -196,6 +196,7 @@ using the matched rule and runs it. Rules enabled by default are as follows:
 * `git_pull_clone` – clones instead of pulling when the repo does not exist;
 * `git_pull_uncommitted_changes` – stashes changes before pulling and pops them afterwards;
 * `git_push` – adds `--set-upstream origin $branch` to previous failed `git push`;
+* `git_push_different_branch_names` – fixes pushes when local brach name does not match remote branch name;
 * `git_push_pull` – runs `git pull` when `push` was rejected;
 * `git_push_without_commits` – Creates an initial commit if you forget and only `git add .`, when setting up a new project;
 * `git_rebase_no_changes` – runs `git rebase --skip` instead of `git rebase --continue` when there are no changes;

tests/rules/test_git_push_different_branch_names.py

@@ -0,0 +1,39 @@
+import pytest
+from thefuck.rules.git_push_different_branch_names import get_new_command, match
+from thefuck.types import Command
+
+
+output = """fatal: The upstream branch of your current branch does not match
+the name of your current branch.  To push to the upstream branch
+on the remote, use
+
+    git push origin HEAD:%s
+
+To push to the branch of the same name on the remote, use
+
+    git push origin %s
+
+To choose either option permanently, see push.default in 'git help config'.
+"""
+
+
+def error_msg(localbranch, remotebranch):
+    return output % (remotebranch, localbranch)
+
+
+def test_match():
+    assert match(Command('git push', error_msg('foo', 'bar')))
+
+
+@pytest.mark.parametrize('command', [
+    Command('vim', ''),
+    Command('git status', error_msg('foo', 'bar')),
+    Command('git push', '')
+])
+def test_not_match(command):
+    assert not match(command)
+
+
+def test_get_new_command():
+    new_command = get_new_command(Command('git push', error_msg('foo', 'bar')))
+    assert new_command == 'git push origin HEAD:bar'

thefuck/rules/git_push_different_branch_names.py

@@ -0,0 +1,12 @@
+import re
+from thefuck.specific.git import git_support
+
+
+@git_support
+def match(command):
+    return "push" in command.script and "The upstream branch of your current branch does not match" in command.output
+
+
+@git_support
+def get_new_command(command):
+    return re.findall(r'^ +(git push [^\s]+ [^\s]+)', command.output, re.MULTILINE)[0]