path: root/Documentation
diff options
Diffstat (limited to 'Documentation')
2 files changed, 32 insertions, 0 deletions
diff --git a/Documentation/git-receive-pack.txt b/Documentation/git-receive-pack.txt
index 0ccd5fb..86a4b32 100644
--- a/Documentation/git-receive-pack.txt
+++ b/Documentation/git-receive-pack.txt
@@ -114,6 +114,8 @@ will be performed, and the update, post-receive and post-update
hooks will not be invoked either. This can be useful to quickly
bail out if the update is not to be supported.
+See the notes on the quarantine environment below.
update Hook
Before each ref is updated, if $GIT_DIR/hooks/update file exists
@@ -214,6 +216,33 @@ if the repository is packed and is served via a dumb transport.
exec git update-server-info
+Quarantine Environment
+When `receive-pack` takes in objects, they are placed into a temporary
+"quarantine" directory within the `$GIT_DIR/objects` directory and
+migrated into the main object store only after the `pre-receive` hook
+has completed. If the push fails before then, the temporary directory is
+removed entirely.
+This has a few user-visible effects and caveats:
+ 1. Pushes which fail due to problems with the incoming pack, missing
+ objects, or due to the `pre-receive` hook will not leave any
+ on-disk data. This is usually helpful to prevent repeated failed
+ pushes from filling up your disk, but can make debugging more
+ challenging.
+ 2. Any objects created by the `pre-receive` hook will be created in
+ the quarantine directory (and migrated only if it succeeds).
+ 3. The `pre-receive` hook MUST NOT update any refs to point to
+ quarantined objects. Other programs accessing the repository will
+ not be able to see the objects (and if the pre-receive hook fails,
+ those refs would become corrupted). For safety, any ref updates
+ from within `pre-receive` are automatically rejected.
linkgit:git-send-pack[1], linkgit:gitnamespaces[7]
diff --git a/Documentation/githooks.txt b/Documentation/githooks.txt
index 9565dc3..32343ae 100644
--- a/Documentation/githooks.txt
+++ b/Documentation/githooks.txt
@@ -256,6 +256,9 @@ environment variables will not be set. If the client selects
to use push options, but doesn't transmit any, the count variable
will be set to zero, `GIT_PUSH_OPTION_COUNT=0`.
+See the section on "Quarantine Environment" in
+linkgit:git-receive-pack[1] for some caveats.