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Bandaid

Drush tool for helping with patch management on Drupal, which helps with patching, and upgrading modules.

See this blog post for the rationale behind this Drush command.

"It's awesome" - Satisfied user

Before you pick up this loaded gun

Bandaid assumes that you keep your site in Git or another VCS, and will assume that anything worth keeping is either committed or stashed. Consider yourself warned.

Installing

The recommended way to install is using composer:

• Install Composer globally (if needed).

• To install the lastest stable:

  cd ~/.drush && composer require xendk/bandaid:*

• To install the bleeding edge:

  cd ~/.drush && composer require xendk/bandaid:dev-master

• To update (will update to the lastest stable or bleeding edge depending on what you chose initially):

  cd ~/.drush && composer update xendk/bandaid

Or you can install manuallly by cloning the repo or downloading a release package into .drush, and running composer install in the bandaid directory.

Usage

Common options:

--no-cache: will override the file download cache.

Commands, in the order they'll be useful:

Patching

drush bandaid-patch <patch file|url of patch|d.o issue> [project path]

Project path is the path to the project you want to patch. Optional if you are issuing the command from the module's or project's directory.

Will patch the module with supplied patch, and if successful pop up your editor for a reason for patching (to remind your future you why you did this in the first place). This information will be written to a .yml file next to the module directory. You can edit the YAML file if the need be, but be aware that it's used by the following commands.

If the supplied patch is a local file, it will be saved to the YAML file with a path relative to the YAML file, so it is assumed that local patches are committed to the repository.

Example:

drush bandaid-patch patches/panels-something.patch  sites/all/modules/contrib/panels

Use the given patch and save it in the .yml file as ../../../patches/panels-something.patch.

Example:

drush bandaid-patch https://www.drupal.org/node/1985980#comment-8596585 sites/all/modules/contrib/panels

Will patch the module with the patch from the fifth comment (cid 8596585).

For issue URLs, the "home" of the patch is automatically set to the issue URL, for URLs pointing directly to the patch/local files, it will ask the you.

If supplied an issue URL that doesn't point to a specific comment, it'll list the found patches and ask which to use.

If you don't like the interactive questions, these can be supplied with the --home and --reason options.

You can use --editor to specify your preferred editor (or set $EDITOR or $VISUAL), or use --no-editor to not invoke an editor at all.

Failure mode

Could theoretically crap all over your module if the patch doesn't apply properly. A subtle reminder of the good practice of committing the original module first. However, as git and patch is pretty conservative, it's unlikely they'd really foul up the module, and git reset should be able to fix it anyway.

Checking local changes

drush bandaid-diff [project path] [patch file]

Example:

drush bandaid-diff sites/all/modules/contrib/panels

Shows the diff of the local changes, minus the patches from the YAML file. Can be used to examining the state of a module or producing patches for upstream. Should produce a warning if the patch wouldn't apply to the base revision.

Will output the patch on stdout unless the second arguments is given.

Failure mode

Won't do anything in case of error.

Removing patches

drush bandaid-tearoff [project path]

Example:

drush bandaid-tearoff sites/all/modules/contrib/panels

Will reverse the applied patches, and create a <module>.local.patch file that contains any further local modifications.

You can now use drush dl to upgrade the module.

Failure mode

In the case that a patch from the YAML file doesn't apply cleanly, or other errors, it'll just stubbornly refuse to do anything, leaving it up to you to bisect your way to finding out whoever screwed up the YAML file or updated the module without properly dealing with the YAML file, and thus apply the clue stick upon.

For less drastic fouls (such as patches applied but not mentioned in the YAML file), it'll just produce a local patch with more changes than you'd expect.

Re-patching

drush bandaid-apply [project path]

Example:

drush bandaid-apply sites/all/modules/contrib/panels

Will reapply the patches from the yaml file, and lastly any <module>.local.patch and, if successful, delete the local patch file.

Failure mode

Will error out per default if any of the patches from the YAML file fail to apply. The option --ignore-failing will make it ignore failing patches and --update-yaml removes the patches from the YAML file. Handy if the patches has been applied upstream.

You can also hack the YAML file manually and use this command to apply a set of patches to a pristine version of the module. To ensure that you've not left a mess for the next poor soul to come along, commit your changes (to a temporary branch, if you prefer), and try running bandaid-tearoff, and see if the local patch looks sane.

De-gitting

drush bandaid-degit [project path]

Example:

drush bandaid-degit custom_module

If you have a project that is a git checkout, this command will make a note of the origin repository and the checked out revision in the YAML file.

Failure mode

As it deletes the .git directory, it will delete any un-committed changes, un-pushed commits and stashes.

Re-gitting

drush bandaid-regit [project path]

Example:

drush bandaid-regit custom_module

Will turn a project into a git repository. The origin and revision is either read from the YAML file (where bandaid-degit put it), or can be supplied with the --origin ande --revision command line options.

This is handy for pushing changes upstream or updating projects downloaded via git.

Failure mode

Not being able to figure out the right origin and revision, which just leaves you where you started.

In closing

If you discover a module that produces crap in the local patches or otherwise make Bandaid misbehave, open an issue.

If it breaks, you get to keep both pieces.