On 5/15/2017 3:50 PM, David Turner wrote:
-----Original Message-----
From: Ben Peart [mailto:peart...@gmail.com]
Sent: Monday, May 15, 2017 3:14 PM
To: git@vger.kernel.org
Cc: gits...@pobox.com; benpe...@microsoft.com; pclo...@gmail.com;
johannes.schinde...@gmx.de; David Turner <david.tur...@twosigma.com>;
p...@peff.net
Subject: [PATCH v1 5/5] Add a sample query-fsmonitor hook script that
integrates with the cross platform Watchman file watching service.
To use the script:
Download and install Watchman from https://facebook.github.io/watchman/
and instruct Watchman to watch your working directory for changes
('watchman watch-project /usr/src/git').
Rename the sample integration hook from query-fsmonitor.sample to query-
fsmonitor.
Configure git to use the extension ('git config core.fsmonitor true') and
optionally turn on the untracked cache for optimal performance ('git config
core.untrackedcache true').
Signed-off-by: Ben Peart <benpe...@microsoft.com>
Signed-off-by: Johannes Schindelin <johannes.schinde...@gmx.de>
---
templates/hooks--query-fsmonitor.sample | 27
+++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
create mode 100644 templates/hooks--query-fsmonitor.sample
diff --git a/templates/hooks--query-fsmonitor.sample b/templates/hooks--
query-fsmonitor.sample
new file mode 100644
index 0000000000..4bd22f21d8
--- /dev/null
+++ b/templates/hooks--query-fsmonitor.sample
@@ -0,0 +1,27 @@
+#!/bin/sh
+#
+# An example hook script to integrate Watchman #
+(https://facebook.github.io/watchman/) with git to provide fast # git
+status.
+#
+# The hook is passed a time_t formatted as a string and outputs to #
+stdout all files that have been modified since the given time.
+# Paths must be relative to the root of the working tree and #
+separated by a single NUL.
+#
+# To enable this hook, rename this file to "query-fsmonitor"
+
+# Convert unix style paths to escaped Windows style paths case "$(uname
+-s)" in
+MINGW*|MSYS_NT*)
+ GIT_WORK_TREE="$(cygpath -aw "$PWD" | sed 's,\\,\\\\,g')"
+ ;;
+*)
+ GIT_WORK_TREE="$PWD"
+ ;;
+esac
+
+# Query Watchman for all the changes since the requested time echo
+"[\"query\", \"$GIT_WORK_TREE\", {\"since\": $1,
+\"fields\":[\"name\"]}]" | \ watchman -j | \ perl -e 'use JSON::PP; my
+$o = JSON::PP->new->utf8->decode(join("", <>)); die "Watchman: $o-
{'error'}.\nFalling back to scanning...\n" if defined($o->{"error"});
print(join("\0", @{$o->{"files"}}));'
Last time I checked, the argument to 'since' was not a time_t -- it was a
watchman clock spec. Have you tested this? Does it work?
Watchman also accepts a Unix time value for "since" as documented here
(https://facebook.github.io/watchman/docs/expr/since.html).
Yes, this has been tested and works correctly as long as you have a
recent version that contains the patch
(https://github.com/facebook/watchman/commit/67b26a8938336f08918fc7187129b6c1a571f35b)
that made sure it was greedy when using the Unix time.