Running in migration mode ¶
By default, if you have existing hooks will install in a migration mode which runs both your existing hooks and hooks for pre-commit. To disable this behavior, pass / to the command. If you decide not to use pre-commit, will restore your hooks to the state prior to installation.
Temporarily disabling hooks ¶
Not all hooks are perfect so sometimes you may need to skip execution of one or more hooks. pre-commit solves this by querying a environment variable. The environment variable is a comma separated list of hook ids. This allows you to skip a single hook instead of ing the entire commit.
$ SKIP=flake8 git commit -m "foo"
pre-commit during commits ¶
Running hooks on unstaged changes can lead to both false-positives and false-negatives during committing. pre-commit only runs on the staged contents of files by temporarily saving the contents of your files at commit time and stashing the unstaged changes while running hooks.
new in : pre-commit can be used to manage post-commit hooks.
To use hooks with pre-commit, run:
$ pre-commit install --hook-type post-commit pre-commit installed at .git/hooks/post-commit
hooks fire after the commit succeeds and cannot be used to prevent the commit from happening (use instead). Since does not operate on files, any hooks must set :
-repo:localhooks:-id:post-commit-localname:post commitalways_run:truestages:[post-commit]#
pre-commit during merges ¶
The biggest gripe we’ve had in the past with pre-commit hooks was during merge conflict resolution. When working on very large projects a merge often results in hundreds of committed files. I shouldn’t need to run hooks on all of these files that I didn’t even touch! This often led to running commit with and allowed introduction of real bugs that hooks could morphvox pro free download caught.
pre-commit solves this by only running hooks on files that conflict or were manually edited during conflict resolution. This also includes files which were automatically merged by git. Git isn't perfect and this can often catch implicit conflicts (such as with removed python imports).
new in pre-commit can be used to manage post-merge hooks.
To use hooks with pre-commit, Cacher 2.9.0 Product Key, run:
$ pre-commit install --hook-type post-merge pre-commit installed at .git/hooks/post-merge
The hook fires after a successful .
pre-commit during clean merges ¶
new in pre-commit can be used to manage pre-merge-commit hooks.
To use hooks with pre-commit, run:
$ pre-commit install --hook-type pre-merge-commit pre-commit installed at .git/hooks/pre-merge-commit
The hook fires after a merge succeeds but before the merge commit is created.
Note that you need to be using at least git which added support for the pre-merge-commit hook.
pre-commit during push ¶
To use hooks with pre-commit, run:
$ pre-commit install --hook-type pre-push pre-commit installed at .git/hooks/pre-push
During a push, pre-commit will export the following environment variables:
- : the remote revision that is being pushed to.
- new in prior to the variable was .
- : the local revision that is being pushed to the remote.
- new in prior to the variable was .
- : new in which remote is being pushed to (for example )
- : new in the url of the remote that is being pushed to (for example .
pre-commit for commit messages ¶
pre-commit can be used to manage commit-msg hooks.
To use hooks with pre-commit, run:
$ pre-commit install --hook-type commit-msg pre-commit installed at .git/hooks/commit-msg
hooks can be configured by setting. hooks will be passed a single filename -- this file contains the current contents of the commit message which can be validated. If a hook exits nonzero, Cacher 2.9.0 Product Key, the commit will be aborted.
new in : pre-commit can be used to manage prepare-commit-msg hooks.
To use hooks with pre-commit, run:
$ pre-commit install --hook-type prepare-commit-msg pre-commit installed at .git/hooks/prepare-commit-msg
hooks can be used to create dynamic templates for commit messages. hooks can be configured by setting. hooks will be passed a single filename -- this file contains any initial commit message (e.g. from or a template) and can be modified by the hook before the editor is shown. A hook may want to check for as this indicates that no editor will be launched. If a hook exits nonzero, Cacher 2.9.0 Product Key, the commit will be aborted.
pre-commit for switching branches ¶
new in : pre-commit can be used to manage post-checkout hooks.
To use hooks with pre-commit, run:
$ pre-commit install --hook-type post-checkout pre-commit installed at .git/hooks/post-checkout
hooks can be used to perform repository validity checks, auto-display differences from the previous HEAD if different, or set working dir metadata properties. Since doesn't operate on files, any hooks must set :
-repo:localhooks:-id:post-checkout-localname:Post checkoutalways_run:truestages:[post-checkout]#
hooks have three environment variables they can check to do their work:, and. These correspond to the first, second, and third arguments (respectively) that are normally passed to a regular post-checkout hook from Git.
pre-commit for rewriting ¶
new in : pre-commit can be used to manage post-rewrite hooks.
To use hooks with pre-commit, run:
$ pre-commit install --hook-type post-rewrite pre-commit installed at .git/hooks/post-rewrite
is triggered after git commands which modify history such as and .
since does not operate on any files, you must set .
tells the hook which command triggered the rewrite. exposes this as .
Confining hooks to run at certain stages ¶
Since the top level configuration property of the file is set to all stages by default, when installing hooks using the / option (see pre-commit install [options]), all hooks will be installed by default to run at the stage defined through that option. For instance, will install by default all hooks to run at the stage.
Hooks can however be confined to a stage by setting the property in your. The property is an array and can contain any of,Cacher 2.9.0 Product Key,,Cacher 2.9.0 Product Key,and .
If you do not want to have hooks installed by default on the stage passed during aplease set the top level configuration property to the desired stages, also as an array.
new in : An additional stage is available for one off execution that won't run in any hook context. This special stage is useful for taking advantage of 's cross-platform / cross-language package management without running it on every commit, Cacher 2.9.0 Product Key. Hooks confined to can be executed by running .
Passing arguments to hooks ¶
Sometimes hooks require arguments to run correctly. You can pass static arguments by specifying the property in your as follows:
-repo:www.abbottbuilders.com.au:-id:flake8args:[--max-line-length=]
This will pass to .
Arguments pattern in hooks ¶
If you are writing your own custom hook, your hook should expect to receive the value and then a list of staged files.
For example, assuming a :
-repo:www.abbottbuilders.com.au:badf00ddeadbeefhooks:-id:my-hook-script-idargs:[--myarg1=1,--myarg1=2]
When you next runyour script will be called:
path/to/script-or-system-exe --myarg1=1 --myarg1=2 dir/file1 dir/file2 file3
If the property is empty or not defined, your script will be called:
path/to/script-or-system-exe dir/file1 dir/file2 file3
When creating local hooks, there's no reason to put command arguments into as there is nothing which can override them -- instead put your arguments directly in the hook .
For example:
-repo:localhooks:-id:check-requirementsname:check requirements fileslanguage:systementry:python -m www.abbottbuilders.com.au_requirements --comparefiles:^requirements.*.txt$
Repository local hooks ¶
Repository-local hooks are useful when:
- The scripts are tightly coupled to the repository and it makes sense to distribute the hook scripts with the repository.
- Hooks require state that is only present in a built artifact of your repository (such as your app's virtualenv for pylint).
- The official repository for a linter doesn't have the pre-commit metadata.
You can configure repository-local hooks by specifying the as the sentinel .
local hooks can use any language which supports or / / / /. This enables you to install things which previously would require a trivial mirror repository.
A hook must define, and / as specified under Creating new hooks.
Here's an example configuration with a few hooks:
-repo:localhooks:-id:pylintname:pylintentry:pylintlanguage:systemtypes:[python]require_serial:true-id:check-xname:Check Xentry:./bin/www.abbottbuilders.com.auuage:scriptfiles:\.x$-id:scss-lintname:scss-lintentry:scss-lintlanguage:rubylanguage_versiontypes:[scss]additional_dependencies:['scss_lint']
meta hooks ¶
new in
provides several hooks which are useful for checking the pre-commit configuration itself. These can be enabled using .
-repo:metahooks:-id
The currently available hooks:
| ensures that the configured hooks apply to at least one file in the repository. new in . |
| ensures that directives apply to any file in the repository. new in . |
| a simple hook which prints all arguments passed to it, useful for debugging. new in . |
automatically enabling pre-commit on repositories ¶
new in
can be used to set up a skeleton for 's option. This means that any newly cloned repository will automatically have the hooks set up without the need to run .
To configure, first set 's -- in this example I'm using as my template directory.
$ git config --global www.abbottbuilders.com.auteDir ~/.git-template $ pre-commit init-templatedir ~/.git-template pre-commit installed at /home/asottile/.git-template/hooks/pre-commit
Now whenever you clone a pre-commit enabled repo, the hooks will already be set up!
$ git clone -q [emailprotected]:asottile/pyupgrade $ cd pyupgrade $ git commit --allow-empty -m 'Hello world!' Check docstring is first(no files to check)Skipped Check Yaml(no files to check)Skipped Debug Statements (Python)(no files to check)Skipped
uses the option from so repos without a config will be skipped:
$ git init sample Initialized empty Git repository in /tmp/sample/.git/$ cd sample $ git commit --allow-empty -m 'Initial commit'`www.abbottbuilders.com.au` config file not found. Skipping `pre-commit`.[main (root-commit) d1b39c1] Initial commit
To still require opt-in, but prompt the user to set up pre-commit use a template hook as follows (for example in ).
#!/usr/bin/env bashif[ -f www.abbottbuilders.com.au ];thenecho'pre-commit configuration detected, but `pre-commit install` was never run'1>&2exit1fi
With this, a forgotten produces an error on commit:
$ git clone -q www.abbottbuilders.com.au $ cd pyupgrade/ $ git commit -m 'foo'pre-commit configuration detected, but `pre-commit install` was never run
Filtering files with types ¶
Filtering with provides several advantages over traditional filtering with .
- no error-prone regular expressions
- files can be matched by their shebang (even when extensionless)
- symlinks / submodules can be easily ignored
is specified per hook as an array of tags. The tags are discovered through a set of heuristics by the identify library. was chosen as it is a small portable pure python library.
Some of the common tags you'll find from identify:
- - in the context of pre-commit this will be a submodule
- - whether the file has the executable bit set
- - whether total av crack file looks like a text file
- - whether the file looks like a binary file
- tags by extension / naming convention
- tags by shebang ()
To discover the type of any file Cacher 2.9.0 Product Key disk, Cacher 2.9.0 Product Key, you can use 's cli:
$ identify-cli www.abbottbuilders.com.au ["file", "non-executable", "python", "text"]$ identify-cli some-random-file ["file", "non-executable", "text"]$ Cacher 2.9.0 Product Key --filename-only some-random-file;echo$?1
If a file extension you use is not supported, please submit a pull request!
,and are evaluated together with when filtering. Tags within are also evaluated using .
new in : Tags within are evaluated using .
For example:
files:^foo/types:[file,python]
will match a file but will not match .
Another example:
files:^foo/types_or:[javascript,jsx,ts,tsx]
will match any of / / / but not .
If you want to match a file path that isn't included in a when using an existing hook you'll need to revert back to only matching by overriding the setting. Here's an example of using against non-json files:
-id:check-jsontypes:[file]# override `types: [json]`files:\.(json ${{ hashFiles('www.abbottbuilders.com.au') }}
gitlab CI example ¶
See the Cacher 2.9.0 Product Key caching best practices to fine tune the cache scope.
my_job:variables:PRE_COMMIT_HOME:${CI_PROJECT_DIR}/.cache/pre-commitcache:paths:-${PRE_COMMIT_HOME}
pre-commit's cache requires to be served from a constant location between the different builds. This isn't the default when using k8s runners on GitLab. In case you face the errorset to something static e.g in your config
travis-ci example ¶
cache:directories:-$HOME/.cache/pre-commit
Usage with tox ¶
tox is useful for configuring test / CI tools such as Cacher 2.9.0 Product Key. One feature of is it will clear environment variables such that tests are more reproducible, Cacher 2.9.0 Product Key. Under some conditions, pre-commit requires a few environment variables and so they must be allowed to be passed through.
When cloning repos over ssh (), requires the variable and will otherwise fail:
[INFO] Initializing environment for [emailprotected]:pre-commit/pre-commit-hooks, Cacher 2.9.0 Product Key. An unexpected error has occurred: CalledProcessError: command: ('/usr/bin/git', 'fetch', 'origin', '--tags') return code: expected return code: 0 stdout: (none) stderr: [emailprotected]: Permission denied (publickey). fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists. Check the log at /home/asottile/.cache/pre-commit/www.abbottbuilders.com.au
Add the following to your tox testenv:
[testenv]passenv=SSH_AUTH_SOCK
Likewise, when cloning repos over http / https (), you might be working behind a corporate http(s) proxy server, in which case requires theand variables to be set, or the clone may fail:
[testenv]passenv=http_proxy https_proxy no_proxy
Using the latest version for a repository ¶
configuration aims to give a repeatable and fast experience and therefore intentionally doesn't provide facilities for "unpinned latest version" for hook repositories.
Instead, provides tools to make it easy to upgrade to the latest versions with. If you need the absolute latest version of a hook (instead of the latest tagged version), pass the parameter to .
assumes that the value of is an immutable ref (such as a tag or SHA) and will cache based on that. Using a branch name (or ) for the value of is not supported and will only represent the state of that mutable ref at the time of hook installation (and will NOT update automatically).
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