githooks.txt: improve the intro section

Change the documentation so that:

 * We don't talk about "little scripts". Hooks can be as big as you
   want, and don't have to be scripts, just call them "programs".

 * We note that we change the working directory before a hook is called,
   nothing documented this explicitly, but the current behavior is
   predictable. It helps a lot to know what directory these hooks will
   be executed from.

 * We don't make claims about the example hooks which may not be true
   depending on the configuration of 'init.templateDir'. Clarify that
   we're talking about the default settings of git-init in those cases,
   and move some of this documentation into git-init's documentation
   about the default templates.

 * We briefly note in the intro that hooks can get their arguments in
   various different ways, and that how exactly is described below for
   each hook.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason 2016-05-04 22:58:09 +00:00 committed by Junio C Hamano
parent 90f7b16b3a
commit 49fa52fd00
2 changed files with 23 additions and 11 deletions

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@ -130,7 +130,12 @@ The template directory will be one of the following (in order):
- the default template directory: `/usr/share/git-core/templates`. - the default template directory: `/usr/share/git-core/templates`.
The default template directory includes some directory structure, suggested The default template directory includes some directory structure, suggested
"exclude patterns" (see linkgit:gitignore[5]), and sample hook files (see linkgit:githooks[5]). "exclude patterns" (see linkgit:gitignore[5]), and sample hook files.
The sample hooks are all disabled by default, To enable one of the
sample hooks rename it by removing its `.sample` suffix.
See linkgit:githooks[5] for more general info on hook execution.
EXAMPLES EXAMPLES
-------- --------

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@ -13,18 +13,25 @@ $GIT_DIR/hooks/*
DESCRIPTION DESCRIPTION
----------- -----------
Hooks are little scripts you can place in `$GIT_DIR/hooks` Hooks are programs you can place in the `$GIT_DIR/hooks` directory to
directory to trigger action at certain points. When trigger actions at certain points in git's execution. Hooks that don't
'git init' is run, a handful of example hooks are copied into the have the executable bit set are ignored.
`hooks` directory of the new repository, but by default they are
all disabled. To enable a hook, rename it by removing its `.sample`
suffix.
NOTE: It is also a requirement for a given hook to be executable. Before Git invokes a hook, it changes its working directory to either
However - in a freshly initialized repository - the `.sample` files are the root of the working tree in a non-bare repository, or to the
executable by default. $GIT_DIR in a bare repository.
This document describes the currently defined hooks. Hooks can get their arguments via the environment, command-line
arguments, and stdin. See the documentation for each hook below for
details.
'git init' may copy hooks to the new repository, depending on its
configuration. See the "TEMPLATE DIRECTORY" section in
linkgit:git-init[1] for details. When the rest of this document refers
to "default hooks" it's talking about the default template shipped
with Git.
The currently supported hooks are described below.
HOOKS HOOKS
----- -----