Merge branch 'sb/commit-tree-minileak'

[git.git] / Documentation / git-for-each-ref.txt

diff --git a/Documentation/git-for-each-ref.txt b/Documentation/git-for-each-ref.txt
index 6649f795e8714d9f084a5f4db18bf3a1d405d46a..eae6c0e7bcad5708442d10a7bc73eac3ec90bcbd 100644 (file)
--- a/Documentation/git-for-each-ref.txt
+++ b/Documentation/git-for-each-ref.txt
@@ -7,17 +7,19 @@ git-for-each-ref - Output information on each ref
 
 SYNOPSIS
 --------
-'git-for-each-ref' [--count=<count>]* [--shell|--perl|--python] [--sort=<key>]* [--format=<format>] [<pattern>]
+[verse]
+'git for-each-ref' [--count=<count>] [--shell|--perl|--python|--tcl]
+                  [--sort=<key>]\* [--format=<format>] [<pattern>...]
 
 DESCRIPTION
 -----------
 
 Iterate over all refs that match `<pattern>` and show them
 according to the given `<format>`, after sorting them according
-to the given set of `<key>`s.  If `<max>` is given, stop after
-showing that many refs.  The interporated values in `<format>`
+to the given set of `<key>`.  If `<max>` is given, stop after
+showing that many refs.  The interpolated values in `<format>`
 can optionally be quoted as string literals in the specified
-host language.
+host language allowing their direct evaluation in that language.
 
 OPTIONS
 -------
@@ -29,8 +31,9 @@ OPTIONS
 <key>::
        A field name to sort on.  Prefix `-` to sort in
        descending order of the value.  When unspecified,
-       `refname` is used.  More than one sort keys can be
-       given.
+       `refname` is used.  You may use the --sort=<key> option
+       multiple times, in which case the last key becomes the primary
+       key.
 
 <format>::
        A string that interpolates `%(fieldname)` from the
@@ -38,14 +41,22 @@ OPTIONS
        is prefixed with an asterisk (`*`) and the ref points
        at a tag object, the value for the field in the object
        tag refers is used.  When unspecified, defaults to
-       `%(refname)`.
-
-<pattern>::
-       If given, the name of the ref is matched against this
-       using fnmatch(3).  Refs that do not match the pattern
-       are not shown.
-
---shell, --perl, --python::
+       `%(objectname) SPC %(objecttype) TAB %(refname)`.
+       It also interpolates `%%` to `%`, and `%xx` where `xx`
+       are hex digits interpolates to character with hex code
+       `xx`; for example `%00` interpolates to `\0` (NUL),
+       `%09` to `\t` (TAB) and `%0a` to `\n` (LF).
+
+<pattern>...::
+       If one or more patterns are given, only refs are shown that
+       match against at least one pattern, either using fnmatch(3) or
+       literally, in the latter case matching completely or from the
+       beginning up to a slash.
+
+--shell::
+--perl::
+--python::
+--tcl::
        If given, strings that substitute `%(fieldname)`
        placeholders are quoted as string literals suitable for
        the specified host language.  This is meant to produce
@@ -62,13 +73,13 @@ keys.
 For all objects, the following names can be used:
 
 refname::
-       The name of the ref (the part after $GIT_DIR/refs/).
+       The name of the ref (the part after $GIT_DIR/).
 
 objecttype::
        The type of the object (`blob`, `tree`, `commit`, `tag`).
 
 objectsize::
-       The size of the object (the same as `git-cat-file -s` reports).
+       The size of the object (the same as 'git-cat-file -s' reports).
 
 objectname::
        The object name (aka SHA-1).
@@ -93,16 +104,22 @@ In any case, a field name that refers to a field inapplicable to
 the object referred by the ref does not cause an error.  It
 returns an empty string instead.
 
+As a special case for the date-type fields, you may specify a format for
+the date by adding one of `:default`, `:relative`, `:short`, `:local`,
+`:iso8601` or `:rfc2822` to the end of the fieldname; e.g.
+`%(taggerdate:relative)`.
+
 
 EXAMPLES
 --------
 
-Show the most recent 3 tagged commits::
+An example directly producing formatted text.  Show the most recent
+3 tagged commits::
 
 ------------
 #!/bin/sh
 
-git-for-each-ref --count=3 --sort='-*authordate' \
+git for-each-ref --count=3 --sort='-*authordate' \
 --format='From: %(*authorname) %(*authoremail)
 Subject: %(*subject)
 Date: %(*authordate)
@@ -112,7 +129,23 @@ Ref: %(*refname)
 ' 'refs/tags'
 ------------
 
-A bit more elaborate report on tags::
+
+A simple example showing the use of shell eval on the output,
+demonstrating the use of --shell.  List the prefixes of all heads::
+------------
+#!/bin/sh
+
+git for-each-ref --shell --format="ref=%(refname)" refs/heads | \
+while read entry
+do
+       eval "$entry"
+       echo `dirname $ref`
+done
+------------
+
+
+A bit more elaborate report on tags, demonstrating that the format
+may be an entire script::
 ------------
 #!/bin/sh
 
@@ -156,7 +189,7 @@ Its message reads as:
        fi
 '
 
-eval=`git-for-each-ref -s --format="$fmt" \
+eval=`git for-each-ref --shell --format="$fmt" \
        --sort='*objecttype' \
        --sort=-taggerdate \
        refs/tags`