mateusrodrigues / bdrung-scripts

Various personal scripts

Various personal scripts

This repository contains various small personal scripts that have no other place to live. Feel free to grub through the list.

bzr2git

Convert a bzr repository to git. It takes a bzr clone URL or a local bzr repository and a git remote URL. The converted git repository is checked to have the same content and that the author/committer names and emails are correct (using userlint).

Example call:

bzr2git lp:jasper-initramfs git+ssh://git.launchpad.net/~ubuntu-dev/jasper-initramfs/+git/main

In case the author/committer names and emails needs to be corrected:

cat > whoopsie.mailmap <<EOF
Evan Dandrea <[e-mail]> Tarmac <>
EOF
bzr2git -m whoopsie.mailmap lp:whoopsie git+ssh://git.launchpad.net/~ubuntu-core-dev/whoopsie/+git/main

As of 2022 some converted git repositories had different content compared to the original bzr repositories due to not correctly moved files. You can fix this by following step:

1. Figure out which commit is broken and check out this commit.
2. Commit a fix-up with the commit message "Fix history".
3. Create fix.py containing a Python commit callback to record the changes of the fix-up commit:

   if commit.message.startswith(b"Fix history"):
       print(
           f"\n### {commit.message.decode()!r}. parents = {commit.parents!r} ###\n"
           f'if commit.message.startswith(b"TODO"):\n'
           f'    print(f"### Fix commit {"{"}commit.message.decode()!r{"}"} ###")\n'
           f"    commit.file_changes += ["
       )
       for fc in commit.file_changes:
           fc_repr = f"        FileChange({fc.type!r}, {fc.filename!r}, {fc.blob_id!r}, {fc.mode!r}),"
           print(fc_repr.replace(chr(39), '"'))
       print("    ]")

4. Run git-filter-repo in the git repository with this fix.py as commit callback:

   git-filter-repo --force --replace-refs=delete-no-add --commit-callback fix.py

   It should print a Python snippet with the changes from the fix-up commit.
5. Copy the Python snippet into fix.py and replace TODO by the commit message from the commit that you want to fix.
6. Run bzr2git again with --commit-callback fix.py added.

copy-mtime

Copy the modification time from one file to another.

Example call:

copy-mtime source_file target_file

dpkg-which

Determine which Debian packages provide the given commands. This is a /usr-merged supporting implementation of dpkg -S $(which $command).

Example call:

dpkg-which readlink

generate-gallery

Generate picture gallery using fgallery (configured by YAML file).

Example YAML configuration example.yaml:

output_dir: fgallery
temp_dir: fgallery/source
galleries:
  - name: example_gallery
    source: pictures/2019/example/*.jpg

Running generate-gallery -c example.yaml would create fgallery/example_gallery using the pictures from pictures/2019/example/*.jpg. The paths can be absolute or relative to the configuration file.

git-archive

Generate a Debian source package from a git repository using git archive. The script reads debian/changelog to determine the source package name and upstream version. It will write the Debian source package to ../${source}_${upstream_version}.orig.tar.xz. The script takes one parameter to specify which tree-ish should be archived (defaults to HEAD). Example call:

git-archive main

savedebdiff

Save the debdiff output as <source>_<version>.debdiff. Pipe the debdiff output to savedebdiff. The diff must contain new debian/changelog entry.

Example call:

debdiff --auto-ver-sort libevent_*.dsc | savediff --open

schroot-wrapper

Wrap the schroot command to prepare the chroot before running. Start a schroot session, prepare the chroot (controlled by the script's parameters), run the session, and end the session afterwards. The preparation includes enabling the Ubuntu proposed pocket, installing packages (from the archive or local .deb files that are copied into the chroot).

Example call to install tzdata from -proposed (to test a stable release update):

schroot-wrapper --enable-proposed -c jammy -p tzdata

Example call to install a locally built package in the chroot:

schroot-wrapper -c lunar -p ../tzdata_2022g-1ubuntu1_all.deb

userlint

Check git authors and commits for correct names and email addresses.

Example call:

userlint

Example successful output:

userlint INFO: Checked 25 commits, found 2 valid and no invalid entries.

Example for an invalid email address:

userlint WARNING: Checked 2 commits, found 1 valid and 1 invalid entries:
Benjamin Drung <bdrung@localhost>
userlint INFO: Suggested mailmap:
Benjamin Drung <[e-mail]> Benjamin Drung <bdrung@localhost>

wallpaper-slideshow

Create a GNOME wallpaper slideshow.

Example call:

wallpaper-slideshow -n "Vacation 2019" ~/Pictures/2019_Vacation"

This would create a slideshow named Vacation 2019 using all images from the directory ~/Pictures/2019_Vacation.

webcam-capture

webcam-capture uses FFmpeg to capture the output of Cam Link 4K device (Audio and Video).

Example call:

webcam-capture