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-rw-r--r--Documentation/git-check-ignore.txt20
1 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/git-check-ignore.txt b/Documentation/git-check-ignore.txt
index 854e4d0..8e1f7ab 100644
--- a/Documentation/git-check-ignore.txt
+++ b/Documentation/git-check-ignore.txt
@@ -39,6 +39,12 @@ OPTIONS
below). If `--stdin` is also given, input paths are separated
with a NUL character instead of a linefeed character.
+-n, --non-matching::
+ Show given paths which don't match any pattern. This only
+ makes sense when `--verbose` is enabled, otherwise it would
+ not be possible to distinguish between paths which match a
+ pattern and those which don't.
+
OUTPUT
------
@@ -65,6 +71,20 @@ are also used instead of colons and hard tabs:
<source> <NULL> <linenum> <NULL> <pattern> <NULL> <pathname> <NULL>
+If `-n` or `--non-matching` are specified, non-matching pathnames will
+also be output, in which case all fields in each output record except
+for <pathname> will be empty. This can be useful when running
+non-interactively, so that files can be incrementally streamed to
+STDIN of a long-running check-ignore process, and for each of these
+files, STDOUT will indicate whether that file matched a pattern or
+not. (Without this option, it would be impossible to tell whether the
+absence of output for a given file meant that it didn't match any
+pattern, or that the output hadn't been generated yet.)
+
+Buffering happens as documented under the `GIT_FLUSH` option in
+linkgit:git[1]. The caller is responsible for avoiding deadlocks
+caused by overfilling an input buffer or reading from an empty output
+buffer.
EXIT STATUS
-----------