Move checkout-branch-worktree to gst-worktree.py

We will add more actions to it than just 'checkout'. Also add
a wrapper shell script that calls gst-worktree.py with the correct
arguments.

1 files changed, 102 insertions, 0 deletions

diff --git a/gst-worktree.py b/gst-worktree.py
new file mode 100644
index 0000000..eb3d601
--- /dev/null
+++ b/gst-worktree.py
@@ -0,0 +1,102 @@
+#!/usr/bin/env python3
+
+import os
+import glob
+import argparse
+import subprocess
+import configparser
+
+from scripts.common import git
+from scripts.common import Colors
+
+
+SCRIPTDIR = os.path.normpath(os.path.dirname(__file__))
+SUBPROJECTS_DIR = os.path.normpath(os.path.join(SCRIPTDIR, "subprojects"))
+
+def repo_has_branch(repo_dir, branch):
+    try:
+        git("describe", branch, repository_path=repo_dir)
+    except subprocess.CalledProcessError:
+        return False
+    return True
+
+def parse_wrapfile(wrapf):
+    cgp = configparser.ConfigParser()
+    cgp.read(wrapf)
+    if 'wrap-git' not in cgp:
+        return None
+    section = cgp['wrap-git']
+    return section['directory'], section['revision']
+
+def get_wrap_subprojects(srcdir, gst_branch):
+    '''
+    Parses wrap files in the subprojects directory for the specified source
+    tree and gets the revisions for all common repos.
+    '''
+    for wrapf in glob.glob(os.path.join(srcdir, 'subprojects', '*.wrap')):
+        entries = parse_wrapfile(wrapf)
+        if not entries:
+            continue
+
+        repo_name, repo_branch = entries
+        parent_repo_dir = os.path.join(SUBPROJECTS_DIR, repo_name)
+        if not os.path.exists(os.path.join(parent_repo_dir, '.git')):
+            continue
+        # If a branch of the same name exists in the gst subproject, use it
+        if repo_name.startswith('gst') and repo_has_branch(parent_repo_dir, gst_branch):
+            repo_branch = gst_branch
+
+        yield repo_name, repo_branch, parent_repo_dir
+
+def checkout_worktree(repo_name, repo_dir, worktree_dir, branch, force=False):
+    print('Checking out worktree for project {!r} into {!r} '
+          '(branch {})'.format(repo_name, worktree_dir, branch))
+    try:
+        args = ["worktree", "add"]
+        if force:
+            args += ["-f", "-f"]
+        args += [worktree_dir, branch]
+        git(*args, repository_path=repo_dir)
+    except Exception as e:
+        out = getattr(e, "output", b"").decode()
+        print("\nCould not checkout worktree %s, please fix and try again."
+              " Error:\n\n%s %s" % (repo_dir, out, e))
+
+        return False
+
+    commit_message = git("show", "--shortstat", repository_path=repo_dir).split("\n")
+    print(u"  -> %s%s%s - %s" % (Colors.HEADER, repo_dir, Colors.ENDC,
+                                    commit_message[4].strip()))
+    return True
+
+def checkout_subprojects(worktree_dir, branch):
+    worktree_subdir = os.path.join(worktree_dir, "subprojects")
+
+    for repo_name, repo_branch, parent_repo_dir in get_wrap_subprojects(worktree_dir, branch):
+        workdir = os.path.normpath(os.path.join(worktree_subdir, repo_name))
+        if not checkout_worktree(repo_name, parent_repo_dir, workdir, repo_branch, force=True):
+            return False
+
+    return True
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(prog="gst-worktree")
+
+
+    parser.add_argument('worktree_dir', metavar='worktree_dir', type=str,
+                        help='The directory where to checkout the new worktree')
+    parser.add_argument('branch', metavar='branch', type=str,
+                        help='The branch to checkout')
+    parser.add_argument("--no-color", default=False, action='store_true',
+                        help="Do not output ansi colors.")
+    options = parser.parse_args()
+
+    if options.no_color or not Colors.can_enable():
+        Colors.disable()
+
+    options.worktree_dir = os.path.abspath(options.worktree_dir)
+    if not checkout_worktree('gst-build', SCRIPTDIR, options.worktree_dir, options.branch):
+        exit(1)
+    if not checkout_subprojects(options.worktree_dir, options.branch):
+        exit(1)