[PATCH v2 7/7] docs: document multiple hooks

["brian m. carlson" <sandals@crustytoothpaste.net>]

Document the semantics and behavior of multiple hooks, including the
configuration options and requirements for them to be run.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
---
 Documentation/config.txt      |  2 ++
 Documentation/config/hook.txt | 19 +++++++++++++++++++
 Documentation/githooks.txt    |  9 +++++++++
 3 files changed, 30 insertions(+)
 create mode 100644 Documentation/config/hook.txt

diff --git a/Documentation/config.txt b/Documentation/config.txt
index d87846faa6..f62b8ce494 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -350,6 +350,8 @@ include::config/guitool.txt[]
 
 include::config/help.txt[]
 
+include::config/hook.txt[]
+
 include::config/http.txt[]
 
 include::config/i18n.txt[]
diff --git a/Documentation/config/hook.txt b/Documentation/config/hook.txt
new file mode 100644
index 0000000000..4585cc7f55
--- /dev/null
+++ b/Documentation/config/hook.txt
@@ -0,0 +1,19 @@
+hook.<name>.errorBehavior::
+  Control the error behavior when using multiple hooks.
++
+--
+* `stop-on-first` - If a hook fails, do not execute further hooks, even if the
+  command normally ignores whether hooks succeed or fail, and return its exit
+  code as the exit code of the hook set. If all hooks succeed, the exit code is 0.
+  This is the default.
+* `report-any-error` - Always execute all hooks, but return the exit code of the
+  first failing hook as the exit code of the hook set. If all hooks succeed, the
+  exit code of the hook set is 0.
+* `report-any-success` - Always execute all hooks, and if any hook succeeds,
+  return 0 as the exit code of the hook set. If all hooks fail, the exit code of
+  the hook set is 1.
+--
++
+If the exit code of the hook set is zero, then the hooks are considered to have
+succeeded; otherwise, they are considered to have failed. Note that the success
+or failure of some hooks is ignored (see linkgit:githooks[5] for more).
diff --git a/Documentation/githooks.txt b/Documentation/githooks.txt
index 786e778ab8..c680e575b3 100644
--- a/Documentation/githooks.txt
+++ b/Documentation/githooks.txt
@@ -31,6 +31,15 @@ Hooks can get their arguments via the environment, command-line
 arguments, and stdin. See the documentation for each hook below for
 details.
 
+It is possible to provide multiple hooks for a single function. If the
+main hook file is absent, hooks are additionally looked for in a
+directory with the name of the main hook file with a `.d` appended.
+(That is, if `post-receive` is missing, `post-receive.d` is inspected
+for any hooks that might be present.) Each of these hooks is executed in order,
+sorted by file name. By default, if a hook fails, additional hooks are not
+executed, but this can be controlled with the `hook.*.errorBehavior` setting
+(see linkgit:git-config[1]).
+
 `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