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#!/usr/bin/env python
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"""git-mrb: merge remote branch.
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git mrb [remote:branch OR remote-branch] [onto] [upstream]
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remote must be locally available, and branch must exist in that remote.
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If 'onto' branch isn't given, default is 'master'.
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If 'upstream' repository isn't given, default is 'origin'.
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You can separate the remote and branch spec with either a : or a -.
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"""
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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from subprocess import check_call
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import sys
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#-----------------------------------------------------------------------------
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# Functions
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#-----------------------------------------------------------------------------
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def sh(cmd):
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cmd = cmd.format(**shvars)
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print '$', cmd
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check_call(cmd, shell=True)
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#-----------------------------------------------------------------------------
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# Main Script
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#-----------------------------------------------------------------------------
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argv = sys.argv[1:]
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narg = len(argv)
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try:
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branch_spec = argv[0]
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sep = ':' if ':' in branch_spec else '-'
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remote, branch = branch_spec.split(':', 1)
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if not branch:
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raise ValueError('Branch spec %s invalid, branch not found' %
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branch_spec)
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except:
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import traceback as tb
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tb.print_exc()
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print __doc__
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sys.exit(1)
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onto = argv[1] if narg >= 2 else 'master'
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upstream = argv[1] if narg == 3 else 'origin'
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# Git doesn't like ':' in branch names.
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if sep == ':':
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branch_spec = branch_spec.replace(':', '-')
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# Global used by sh
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shvars = dict(remote=remote, branch_spec=branch_spec, branch=branch,
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onto=onto, upstream=upstream)
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# Start git calls.
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sh('git fetch {remote}')
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sh('git checkout -b {branch_spec} {onto}')
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sh('git merge {remote}/{branch}')
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print """
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*************************************************************
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Run test suite. If tests pass, run the following to merge:
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git checkout {onto}
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git merge {branch_spec}
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git push {upstream} {onto}
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*************************************************************
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""".format(**shvars)
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ans = raw_input("Revert to master and delete temporary branch? [Y/n]: ")
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if ans.strip().lower() in ('', 'y', 'yes'):
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sh('git checkout {onto}')
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sh('git branch -D {branch_spec}')
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