[PATCH v1 4/5] Add documentation for the fsmonitor extension. This includes the core.fsmonitor setting, the query-fsmonitor hook, and the fsmonitor index extension.
Signed-off-by: Ben Peart <benpeart@microsoft.com>
---
Documentation/config.txt | 7 +++++++
Documentation/githooks.txt | 23 +++++++++++++++++++++++
Documentation/technical/index-format.txt | 18 ++++++++++++++++++
3 files changed, 48 insertions(+)
diff --git a/Documentation/config.txt b/Documentation/config.txt
index bc7088b287..a9a58cb8a6 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -391,6 +391,13 @@ core.protectNTFS::
8.3 "short" names.
Defaults to `true` on Windows, and `false` elsewhere.
+core.fsmonitor::
+ If set to true, call the query-fsmonitor hook proc which will
+ identify all files that may have had changes since the last
+ request. This information is used to speed up operations like
+ 'git commit' and 'git status' by limiting what git must scan to
+ detect changes.
+
core.trustctime::
If false, the ctime differences between the index and the
working tree are ignored; useful when the inode change time
diff --git a/Documentation/githooks.txt b/Documentation/githooks.txt
index 706091a569..f7b4b4a844 100644
--- a/Documentation/githooks.txt
+++ b/Documentation/githooks.txt
@@ -448,6 +448,29 @@ The commits are guaranteed to be listed in the order that they were
processed by rebase.
+[[query-fsmonitor]]
+query-fsmonitor
+~~~~~~~~~~~~
+
+This hook is invoked when the configuration option core.fsmonitor is
+set and git needs to identify changed or untracked files. It takes
+a single argument which is the time in elapsed seconds since midnight,
+January 1, 1970.
+
+The hook should output to stdout the list of all files in the working
+directory that may have changed since the requested time. The logic
+should be inclusive so that it does not miss any potential changes.
+The paths should be relative to the root of the working directory
+and be separated by a single NUL.
+
+Git will limit what files it checks for changes as well as which
+directories are checked for untracked files based on the path names
+given.
+
+The exit status determines whether git will use the data from the
+hook to limit its search. On error, it will fall back to verifying
+all files and folders.
+
GIT
---
Part of the linkgit:git[1] suite
diff --git a/Documentation/technical/index-format.txt b/Documentation/technical/index-format.txt
index ade0b0c445..b002d23c05 100644
--- a/Documentation/technical/index-format.txt
+++ b/Documentation/technical/index-format.txt
@@ -295,3 +295,21 @@ The remaining data of each directory block is grouped by type:
in the previous ewah bitmap.
- One NUL.
+
+== File System Monitor cache
+
+ The file system monitor cache tracks files for which the query-fsmonitor
+ hook has told us about changes. The signature for this extension is
+ { 'F', 'S', 'M', 'N' }.
+
+ The extension starts with
+
+ - 32-bit version number: the current supported version is 1.
+
+ - 64-bit time: the extension data reflects all changes through the given
+ time which is stored as the seconds elapsed since midnight, January 1, 1970.
+
+ - 32-bit bitmap size: the size of the CE_FSMONITOR_DIRTY bitmap.
+
+ - An ewah bitmap, the n-th bit indicates whether the n-th index entry
+ is CE_FSMONITOR_DIRTY.
--
2.13.0.windows.1.6.g4597375fc3
Ben Peart <peartben@gmail.com>