Detailed tests of git.py
========================

.. :doctest:
.. :setup: zest.releaser.tests.functional.setup
.. :teardown: zest.releaser.tests.functional.teardown

Some initial imports:

    >>> from zest.releaser import git
    >>> from zest.releaser.utils import execute_command
    >>> import os

Project name
------------

The prepared git project has a setup.py, so the name in there is used:

    >>> os.chdir(gitsourcedir)
    >>> checkout = git.Git()
    >>> checkout.name
    'tha.example'

When the setup.py doesn't exist or doesn't return a proper name, we fall back
to the directory name.

    >>> orig = checkout.get_setup_py_name
    >>> checkout.get_setup_py_name= lambda: None  # Hack
    >>> checkout.name
    'tha.example-git'
    >>> checkout.get_setup_py_name = orig  # Restore hack


Diff and commit
---------------

Make a change:

    >>> setup_py = os.path.join(gitsourcedir, 'setup.py')
    >>> dont_care = open(setup_py, 'a').write('\na = 2\n')
    >>> cmd = checkout.cmd_diff()
    >>> cmd
    'git diff'
    >>> print(execute_command(cmd))
    diff --git a/setup.py b/setup.py
    index 9c14143..54fa3b9 100644
    --- a/setup.py
    +++ b/setup.py
    @@ -36,3 +36,5 @@ setup(name='tha.example',
               'console_scripts': [
               ]},
           )
    +
    +a = 2

Commit it:

    >>> cmd = checkout.cmd_commit('small tweak')
    >>> cmd
    'git commit -a -m "small tweak"'

In some cases we get this output:
``[master ...] small tweak``
and in other this:
``Created commit ...: small tweak``

    >>> print('dummy %s' % execute_command(cmd))
    dummy...small tweak
     1 files changed, 2 insertions(+), 0 deletions(-)


Tags
----

Originally there are no tags:

    >>> checkout.available_tags()
    []

Create a tag and it will show up:

    >>> cmd = checkout.cmd_create_tag('0.1')
    >>> cmd
    'git tag 0.1 -m "Tagging 0.1"'
    >>> dont_care = execute_command(cmd)
    >>> checkout.available_tags()
    ['0.1']

A specific tag url is important for subversion, but nonsensical for
git.  We just return the version as-is:

    >>> checkout.tag_url('holadijee')
    'holadijee'

Make and commit a small change:

    >>> dont_care = open(setup_py, 'a').write('\nb = 3\n')
    >>> cmd = checkout.cmd_commit('small tweak')
    >>> print('dummy %s' % execute_command(cmd))
    dummy...small tweak
     1 files changed, 2 insertions(+), 0 deletions(-)

Now we can request the changes since a specific tag:

    >>> cmd = checkout.cmd_diff_last_commit_against_tag('0.1')
    >>> cmd
    'git diff 0.1'
    >>> print(execute_command(cmd))
    diff --git a/setup.py b/setup.py
    index 9c14143..54fa3b9 100644
    --- a/setup.py
    +++ b/setup.py
    @@ -38,3 +38,5 @@ setup(name='tha.example',
           )
    <BLANKLINE>
     a = 2
    +
    +b = 3


Making a tag checkout
---------------------

For checking out a tag with subversion or mercurial, we first create a temp
dir and afterwards do a checkout/clone of a tag.  With git, we immediately
make a clone of the repository in a tempdir and afterwards switch ("checkout")
that directory to the tag.

For checking out a tag, we first need a temporary dir with a clone of the
repository.

    >>> temp = checkout.prepare_checkout_dir('somename')
    >>> temp
    'TMPDIR/somename...'
    >>> os.path.isdir(temp)
    True

The checked out clone is really a clone and not an empty directory.  The
setup.py also contains our latest "b = 3" change:

    >>> sorted(os.listdir(temp))
    ['.git', '.gitignore', 'CHANGES.txt', ...]
    >>> print(open(os.path.join(temp, 'setup.py')).read())
    from setuptools import setup, find_packages
    ...
    b = 3

For git, we have to change to that directory!  Git doesn't work with paths.

    >>> cmd = checkout.cmd_checkout_from_tag('0.1', temp)
    Traceback (most recent call last):
    ...
    RuntimeError: SYSTEM EXIT (code=1)

Chdir and make a tag checkout:

    >>> os.chdir(temp)
    >>> cmd = checkout.cmd_checkout_from_tag('0.1', temp)
    >>> cmd
    'git checkout 0.1 && git submodule update --init --recursive'
    >>> print(execute_command(cmd))
    RED Note: ...0.1...
    RED HEAD is now at ... small tweak

The tempdir should be at tag 0.1.  The last line ought to be "a = 2"

    >>> print(open(os.path.join(temp, 'setup.py')).read())
    from setuptools import setup, find_packages
    ...
    a = 2


Pushing changes
---------------

For git, committing isn't enough. We need to push changes to the server:

    >>> checkout.push_commands()
    ['git push', 'git push --tags']