[PATCH 8/8] man: document notmuch tag --stdin option

[Jani Nikula]

---
 man/man1/notmuch-tag.1 |   44 +++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 43 insertions(+), 1 deletions(-)

diff --git a/man/man1/notmuch-tag.1 b/man/man1/notmuch-tag.1
index aa4546e..30693cf 100644
--- a/man/man1/notmuch-tag.1
+++ b/man/man1/notmuch-tag.1
@@ -4,7 +4,11 @@ notmuch-tag \- Add/remove tags for all messages matching the search terms.
 
 .SH SYNOPSIS
 .B notmuch tag
-.RI  "+<" tag> "|\-<" tag "> [...] [\-\-] <" search-term ">..."
+.RI "+<" tag ">|\-<" tag "> [...] [\-\-] <" search-terms ">"
+
+.B notmuch tag
+.RI "--stdin"
+
 
 .SH DESCRIPTION
 
@@ -29,6 +33,44 @@ updates the maildir flags according to tag changes if the
 configuration option is enabled. See \fBnotmuch-config\fR(1) for
 details.
 
+Supported options for
+.B tag
+include
+.RS 4
+.TP 4
+.BR \-\-stdin
+
+Read batch tagging operations from standard input. This is more
+efficient than repeated
+.B notmuch tag
+invocations. See
+.B TAG FILE FORMAT
+below for the input format. This option is not compatible with
+specifying tagging on the command line.
+.RE
+
+.SH TAG FILE FORMAT
+
+The input must consist of lines of the format:
+
+.RI "T +<" tag ">|\-<" tag "> [...] [\-\-] <" search-terms ">"
+
+Each line is interpreted similarly to
+.B notmuch tag
+command line arguments. The delimiter is one or more spaces ' '. Any
+characters in <tag> and <search-terms>
+.B may
+be hex encoded with %NN where NN is the hexadecimal value of the
+character. Any ' ' and '%' characters in <tag> and <search-terms>
+.B must
+be hex encoded (using %20 and %25, respectively). Any characters that
+are not part of <tag> or <search-terms>
+.B must not
+be hex encoded.
+
+Leading and trailing space ' ' is ignored. Empty lines and lines
+beginning with '#' are ignored.
+
 .SH SEE ALSO
 
 \fBnotmuch\fR(1), \fBnotmuch-config\fR(1), \fBnotmuch-count\fR(1),
-- 
1.7.5.4