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"""Utilities to call Git commands.""" |
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import os |
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import logging |
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from contextlib import suppress |
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import re |
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from . import common, settings |
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from .shell import call |
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from .exceptions import ShellError |
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log = logging.getLogger(__name__) |
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15
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1 |
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def git(*args, **kwargs): |
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return call('git', *args, **kwargs) |
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def clone(repo, path, *, cache=settings.CACHE, sparse_paths=None, rev=None): |
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"""Clone a new Git repository.""" |
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log.debug("Creating a new repository...") |
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name = repo.split('/')[-1] |
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if name.endswith(".git"): |
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name = name[:-4] |
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reference = os.path.join(cache, name + ".reference") |
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if not os.path.isdir(reference): |
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git('clone', '--mirror', repo, reference) |
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normpath = os.path.normpath(path) |
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if sparse_paths: |
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os.mkdir(normpath) |
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git('-C', normpath, 'init') |
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git('-C', normpath, 'config', 'core.sparseCheckout', 'true') |
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git('-C', normpath, 'remote', 'add', '-f', 'origin', reference) |
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with open("%s/%s/.git/info/sparse-checkout" % (os.getcwd(), normpath), 'w') as fd: |
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fd.writelines(sparse_paths) |
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with open("%s/%s/.git/objects/info/alternates" % (os.getcwd(), normpath), 'w') as fd: |
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fd.write("%s/objects" % reference) |
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# We use directly the revision requested here in order to respect, |
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# that not all repos have `master` as their default branch |
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git('-C', normpath, 'pull', 'origin', rev) |
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else: |
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git('clone', '--reference', reference, repo, os.path.normpath(path)) |
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def is_sha(rev): |
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"""Heuristically determine whether a revision corresponds to a commit SHA. |
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Any sequence of 7 to 40 hexadecimal digits will be recognized as a |
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commit SHA. The minimum of 7 digits is not an arbitrary choice, it |
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is the default length for short SHAs in Git. |
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""" |
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return re.match('^[0-9a-f]{7,40}$', rev) is not None |
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def fetch(repo, rev=None): |
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"""Fetch the latest changes from the remote repository.""" |
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git('remote', 'set-url', 'origin', repo) |
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args = ['fetch', '--tags', '--force', '--prune', 'origin'] |
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if rev: |
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if is_sha(rev): |
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pass # fetch only works with a SHA if already present locally |
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elif '@' in rev: |
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pass # fetch doesn't work with rev-parse |
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else: |
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args.append(rev) |
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git(*args) |
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def valid(): |
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"""Confirm the current directory is a valid working tree.""" |
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log.debug("Checking for a valid working tree...") |
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try: |
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git('rev-parse', '--is-inside-work-tree', _show=False) |
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except ShellError: |
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return False |
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else: |
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return True |
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85
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86
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def changes(include_untracked=False, display_status=True, _show=False): |
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"""Determine if there are changes in the working tree.""" |
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status = False |
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try: |
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# Refresh changes |
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git('update-index', '-q', '--refresh', _show=False) |
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94
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# Check for uncommitted changes |
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git('diff-index', '--quiet', 'HEAD', _show=_show) |
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# Check for untracked files |
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lines = git('ls-files', '--others', '--exclude-standard', _show=_show) |
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except ShellError: |
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status = True |
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1 |
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103
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else: |
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status = bool(lines) and include_untracked |
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106
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if status and display_status: |
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with suppress(ShellError): |
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lines = git('status', _show=True) |
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common.show(*lines, color='git_changes') |
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1 |
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111
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return status |
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113
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114
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def update(rev, *, clean=True, fetch=False): # pylint: disable=redefined-outer-name |
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"""Update the working tree to the specified revision.""" |
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hide = {'_show': False, '_ignore': True} |
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117
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1 |
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118
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git('stash', **hide) |
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if clean: |
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git('clean', '--force', '-d', '-x', _show=False) |
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121
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1 |
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122
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rev = _get_sha_from_rev(rev) |
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git('checkout', '--force', rev) |
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git('branch', '--set-upstream-to', 'origin/' + rev, **hide) |
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125
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126
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if fetch: |
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# if `rev` was a branch it might be tracking something older |
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git('pull', '--ff-only', '--no-rebase', **hide) |
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129
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1 |
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130
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1 |
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131
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1 |
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def get_url(): |
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"""Get the current repository's URL.""" |
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return git('config', '--get', 'remote.origin.url', _show=False)[0] |
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134
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135
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1 |
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136
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def get_hash(_show=False): |
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"""Get the current working tree's hash.""" |
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return git('rev-parse', 'HEAD', _show=_show)[0] |
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139
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140
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141
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def get_tag(): |
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"""Get the current working tree's tag (if on a tag).""" |
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143
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return git('describe', '--tags', '--exact-match', |
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_show=False, _ignore=True)[0] |
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145
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146
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147
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def get_branch(): |
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"""Get the current working tree's branch.""" |
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return git('rev-parse', '--abbrev-ref', 'HEAD', _show=False)[0] |
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150
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151
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152
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def _get_sha_from_rev(rev): |
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"""Get a rev-parse string's hash.""" |
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154
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if '@{' in rev: # TODO: use regex for this |
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parts = rev.split('@') |
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branch = parts[0] |
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date = parts[1].strip("{}") |
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git('checkout', '--force', branch, _show=False) |
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rev = git('rev-list', '-n', '1', '--before={!r}'.format(date), |
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branch, _show=False)[0] |
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return rev |
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jacebrowning /
gitman
