gst-worktree.py

   1 #!/usr/bin/env python3
   2
   3 import os
   4 import glob
   5 import argparse
   6 import subprocess
   7 import configparser
   8
   9 from scripts.common import git
  10 from scripts.common import Colors
  11
  12
  13 SCRIPTDIR = os.path.normpath(os.path.dirname(__file__))
  14 SUBPROJECTS_DIR = os.path.normpath(os.path.join(SCRIPTDIR, "subprojects"))
  15
  16
  17 def repo_has_branch(repo_dir, branch):
  18     if not branch:
  19         return False
  20     try:
  21         git("describe", branch, repository_path=repo_dir)
  22     except subprocess.CalledProcessError:
  23         return False
  24     return True
  25
  26 def parse_wrapfile(wrapf):
  27     cgp = configparser.ConfigParser()
  28     cgp.read(wrapf)
  29     if 'wrap-git' not in cgp:
  30         return None
  31     section = cgp['wrap-git']
  32     return section['directory'], section['revision']
  33
  34 def get_wrap_subprojects(srcdir, gst_branch):
  35     '''
  36     Parses wrap files in the subprojects directory for the specified source
  37     tree and gets the revisions for all common repos.
  38     '''
  39     for wrapf in glob.glob(os.path.join(srcdir, 'subprojects', '*.wrap')):
  40         entries = parse_wrapfile(wrapf)
  41         if not entries:
  42             continue
  43
  44         repo_name, repo_branch = entries
  45         parent_repo_dir = os.path.join(SUBPROJECTS_DIR, repo_name)
  46         if not os.path.exists(os.path.join(parent_repo_dir, '.git')):
  47             continue
  48         # If a branch of the same name exists in the gst subproject, use it
  49         if repo_name.startswith('gst') and repo_has_branch(parent_repo_dir, gst_branch):
  50             repo_branch = gst_branch
  51
  52         yield repo_name, repo_branch, parent_repo_dir
  53
  54 def checkout_worktree(repo_name, repo_dir, worktree_dir, branch, new_branch, force=False):
  55     print('Checking out worktree for project {!r} into {!r} '
  56           '(branch {})'.format(repo_name, worktree_dir, branch))
  57     try:
  58         args = ["worktree", "add"]
  59         if force:
  60             args += ["-f", "-f"]
  61         args += [worktree_dir, branch]
  62         if new_branch:
  63             args += ["-b", new_branch]
  64         git(*args, repository_path=repo_dir)
  65     except subprocess.CalledProcessError as e:
  66         out = getattr(e, "output", b"").decode()
  67         print("\nCould not checkout worktree %s, please fix and try again."
  68               " Error:\n\n%s %s" % (repo_dir, out, e))
  69
  70         return False
  71
  72     commit_message = git("show", "--shortstat", repository_path=repo_dir).split("\n")
  73     print(u"  -> %s%s%s - %s" % (Colors.HEADER, repo_dir, Colors.ENDC,
  74                                     commit_message[4].strip()))
  75     return True
  76
  77 def checkout_subprojects(worktree_dir, branch, new_branch):
  78     worktree_subdir = os.path.join(worktree_dir, "subprojects")
  79
  80     for repo_name, repo_branch, parent_repo_dir in get_wrap_subprojects(worktree_dir, branch):
  81         workdir = os.path.normpath(os.path.join(worktree_subdir, repo_name))
  82         if not checkout_worktree(repo_name, parent_repo_dir, workdir, repo_branch, new_branch, force=True):
  83             return False
  84
  85     return True
  86
  87 def remove_worktree(worktree_dir):
  88     worktree_subdir = os.path.join(worktree_dir, "subprojects")
  89
  90     for repo_name, _, parent_repo_dir in get_wrap_subprojects(worktree_dir, None):
  91         workdir = os.path.normpath(os.path.join(worktree_subdir, repo_name))
  92         if not os.path.exists(workdir):
  93             continue
  94
  95         subprojdir = os.path.normpath(os.path.join(SUBPROJECTS_DIR, repo_name))
  96         if not os.path.exists(subprojdir):
  97             continue
  98
  99         print('Removing worktree {!r}'.format(workdir))
 100         try:
 101             git('worktree', 'remove', '-f', workdir, repository_path=subprojdir)
 102         except subprocess.CalledProcessError as e:
 103             out = getattr(e, "output", b"").decode()
 104             print('Ignoring error while removing worktree {!r}:\n\n{}'.format(workdir, out))
 105
 106     try:
 107         git('worktree', 'remove', '-f', worktree_dir, repository_path=SCRIPTDIR)
 108     except subprocess.CalledProcessError:
 109         print('Failed to remove worktree {!r}'.format(worktree_dir))
 110         return False
 111     return True
 112
 113
 114 if __name__ == "__main__":
 115     parser = argparse.ArgumentParser(prog="gst-worktree")
 116     parser.add_argument("--no-color", default=False, action='store_true',
 117                         help="Do not output ANSI colors")
 118
 119     subparsers = parser.add_subparsers(help='The sub-command to run', dest='command')
 120
 121     parser_add = subparsers.add_parser('add',
 122                                        help='Create a worktree for gst-build and all subprojects')
 123     parser_add.add_argument('worktree_dir', type=str,
 124                             help='Directory where to create the new worktree')
 125     parser_add.add_argument('branch', type=str, default=None,
 126                             help='Branch to checkout')
 127     parser_add.add_argument('-b', '--new-branch', type=str, default=None,
 128                             help='Branch to create')
 129
 130     parser_rm = subparsers.add_parser('rm',
 131                                       help='Remove a gst-build worktree and the subproject worktrees inside it')
 132     parser_rm.add_argument('worktree_dir', type=str,
 133                            help='Worktree directory to remove')
 134
 135     options = parser.parse_args()
 136
 137     if options.no_color or not Colors.can_enable():
 138         Colors.disable()
 139
 140     if not options.command:
 141         parser.print_usage()
 142         exit(1)
 143
 144     worktree_dir = os.path.abspath(options.worktree_dir)
 145
 146     if options.command == 'add':
 147         if not checkout_worktree('gst-build', SCRIPTDIR, worktree_dir, options.branch, options.new_branch):
 148             exit(1)
 149         if not checkout_subprojects(worktree_dir, options.branch, options.new_branch):
 150             exit(1)
 151     elif options.command == 'rm':
 152         if not os.path.exists(worktree_dir):
 153             print('Cannot remove worktree directory {!r}, it does not exist'.format(worktree_dir))
 154             exit(1)
 155         if not remove_worktree(worktree_dir):
 156             exit(1)
 157     else:
 158         # Unreachable code
 159         raise AssertionError