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The desire to format or lint code throughout history has arisen several times. It's more natural to do this in filter-branch since it somewhat forces people to run external commands, but we have an example contrib demo that shows how to run an external command on each file in history that I created even before any of these requests came in and yet I still periodically get requests about it. Make lint-history ever-so-slightly easier to apply to a subset of filenames, and include its usage as an extra cheat sheet comparison for filter-branch-vs-filter-repo commands. Signed-off-by: Elijah Newren <newren@gmail.com> |
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|---|---|---|
| .. | ||
| bfg-ish | ||
| clean-ignore | ||
| filter-branch-ish | ||
| filter-lamely | ||
| insert-beginning | ||
| lint-history | ||
| no-op-example | ||
| README.md | ||
| signed-off-by | ||
Background
filter-repo is not merely a history rewriting tool, it also contains a library that can be used to write new history rewriting tools. This directory contains several examples showing the breadth of different things that could be done.
Quick overview
| Command | Description |
|---|---|
| no-op-example | Simple example with no modifications to filter-repo behavior, just showing what to import and run. |
| insert-beginning | Add a new file (e.g. LICENSE/COPYING) to the beginning of history. |
| signed-off-by | Add a Signed-off-by tag to a range of commits |
| lint-history | Run some lint command on all non-binary files in history. |
| clean-ignore | Delete files from history which match current gitignore rules. |
| filter-lamely (or filter‑branch‑ish) | A nearly bug compatible re-implementation of filter-branch (the git testsuite passes using it instead of filter-branch), with some performance tricks to make it several times faster (though it's still glacially slow compared to filter-repo). |
| bfg-ish | A re-implementation of most of BFG Repo Cleaner, with new features and bug fixes. |
Purpose
Please note that the point of these examples is not to provide new complete tools, but simply to demonstrate that extremely varied history rewriting tools can be created which automatically inherit lots of useful base functionality: rewriting hashes in commit messages, pruning commits that become empty, handling filenames with funny characters, non-standard encodings, handling of replace refs, etc. (Additional examples of using filter-repo as a library can also be found in the testsuite.) My sincerest hope is that these examples provide lots of useful functionality, but that each is missing at least one critical piece for your usecase. Go forth and extend and improve.
Usage
All the examples require a symlink to git-filter-repo in your PYTHONPATH named git_filter_repo.py in order to run; also, all have a --help flag to get a description of their usage and flags.