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copy the pre-commit-hook into this repository and convert it to py3 #23

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sebastian-philipp
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@sebastian-philipp sebastian-philipp commented Oct 13, 2021

Fixes #22

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@epuertat epuertat left a comment

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The pre-commit hook for adding the "Resolves: rhbz#..." is completely unnecessary. It can easily be performed with the git interpret-trailers command.

Comment on lines +29 to +44
def which(executable):
locations = (
'/usr/local/bin',
'/bin',
'/usr/bin',
'/usr/local/sbin',
'/usr/sbin',
'/sbin',
)

for location in locations:
executable_path = os.path.join(location, executable)
if os.path.exists(executable_path):
return executable_path

GIT = which('git')
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shutil.which()?

Comment on lines +67 to +96
def prepend_commit_msg(branch):
"""Prepend the commit message with `text`"""
msgfile = sys.argv[1]
with open(msgfile) as f:
contents = f.read()

if not branch:
return contents

try:
prefix, ticket_id = branch.split('-')
ticket_id = int(ticket_id)
except ValueError:
# We used to raise here, but if cherry-picking to a different branch
# that doesn't comply it would break preventing the cherry-pick. So we
# print out the warning, but end up returning the contents.
print('skipping commit msg change: Branch name "%s" does not follow required format: {tracker}-{ID}' % branch) # NOQA
return contents

if prefix == 'wip':
# Skip "wip" branches, ie "work in progress"
return contents

resolves_line = "\nResolves: %s#%s" % (prefix.lower(), ticket_id)

with open(msgfile, 'a') as f:
# Don't append if it's already there
if resolves_line not in contents:
f.write(resolves_line)

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As we're invoking the git command, this could be easily done with git interpret-trailers command:

subprocess.run(['git', 'interpret-trailers', f'--trailer Resolves: rhbz#{ticket_id}', '--in-place', sys.argv[1]], shell=True, check=True)

That said, a pre-commit hook is not needed for this, and IMHO it should rather be done with interepreter trailers:

-    git('-c', 'core.editor=/bin/true', 'cherry-pick', '-x', '%s~..%s' % (first, last))
+    git('-c', 'core.editor=/bin/true', 'cherry-pick', '-x', '--no-commit', '%s~..%s' % (first, last))
+    git('commit', '--trailer "Resolves: rhbz#{$bz}"', '--no-edit')
    # Merge this rhbz branch back into our starting branch.
    git('checkout', starting_branch)
    git('merge', '--ff-only', 'rhbz-' + bz)
    git('branch', '-d', 'rhbz-' + bz)

@sebastian-philipp
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also the hook fails:

Traceback (most recent call last):
  File "/home/sebastian/Repos/ceph/.git/hooks/prepare-commit-msg", line 49, in branch_name
    name = subprocess.check_output(
  File "/usr/lib64/python3.9/subprocess.py", line 424, in check_output
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
  File "/usr/lib64/python3.9/subprocess.py", line 528, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['/bin/git', 'symbolic-ref', 'HEAD']' returned non-zero exit status 128.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/sebastian/Repos/ceph/.git/hooks/prepare-commit-msg", line 103, in <module>
    main()
  File "/home/sebastian/Repos/ceph/.git/hooks/prepare-commit-msg", line 99, in main
    branch = branch_name().strip().strip('\n')
  File "/home/sebastian/Repos/ceph/.git/hooks/prepare-commit-msg", line 53, in branch_name
    if 'fatal: ref HEAD is not a symbolic ref' in err.output:
TypeError: a bytes-like object is required, not 'str'
error: 'prepare-commit-msg' Hook fehlgeschlagen.

@ktdreyer
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Are we ok with using #24 instead?

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Python 3 Syntax Error (print)
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