Merge branch 'maint'

[git.git] / Documentation / diff-options.txt

diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index b2a05937f9c57e3a6ec70849fcc7aeca277b103b..e4af393515c346528bccb7a4f2d3823aebddddfc 100644 (file)
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -1,11 +1,39 @@
+// Please don't remove this comment as asciidoc behaves badly when
+// the first non-empty line is ifdef/ifndef. The symptom is that
+// without this comment the <git-diff-core> attribute conditionally
+// defined below ends up being defined unconditionally.
+// Last checked with asciidoc 7.0.2.
+
+ifndef::git-format-patch[]
+ifndef::git-diff[]
+:git-diff-core: 1
+endif::git-diff[]
+endif::git-format-patch[]
+
+ifdef::git-format-patch[]
 -p::
-       Generate patch (see section on generating patches)
+       Generate patches without diffstat.
+endif::git-format-patch[]
+
+ifndef::git-format-patch[]
+-p::
+       Generate patch (see section on generating patches).
+       {git-diff? This is the default.}
+endif::git-format-patch[]
 
 -u::
        Synonym for "-p".
 
+-U<n>::
+       Shorthand for "--unified=<n>".
+
+--unified=<n>::
+       Generate diffs with <n> lines of context instead of
+       the usual three. Implies "-p".
+
 --raw::
        Generate the raw format.
+       {git-diff-core? This is the default.}
 
 --patch-with-raw::
        Synonym for "-p --raw".
@@ -34,9 +62,12 @@
 
 --patch-with-stat::
        Synonym for "-p --stat".
+       {git-format-patch? This is the default.}
 
 -z::
-       \0 line termination on output
+       NUL-line termination on output.  This affects the --raw
+       output field terminator.  Also output from commands such
+       as "git-log" will be delimited with NUL between commits.
 
 --name-only::
        Show only names of changed files.
@@ -86,7 +117,7 @@
        Detect renames.
 
 -C::
-       Detect copies as well as renames.
+       Detect copies as well as renames.  See also `--find-copies-harder`.
 
 --diff-filter=[ACDMRTUXB*]::
        Select only files that are Added (`A`), Copied (`C`),
@@ -100,12 +131,13 @@
        that matches other criteria, nothing is selected.
 
 --find-copies-harder::
-       For performance reasons, by default, -C option finds copies only
+       For performance reasons, by default, `-C` option finds copies only
        if the original file of the copy was modified in the same
        changeset.  This flag makes the command
        inspect unmodified files as candidates for the source of
        copy.  This is a very expensive operation for large
-       projects, so use it with caution.
+       projects, so use it with caution.  Giving more than one
+       `-C` option has the same effect.
 
 -l<num>::
        -M and -C options require O(n^2) processing time where n
@@ -167,5 +199,13 @@
 --quiet::
        Disable all output of the program. Implies --exit-code.
 
+--ext-diff::
+       Allow an external diff helper to be executed. If you set an
+       external diff driver with gitlink:gitattributes[5], you need
+       to use this option with gitlink:git-log[1] and friends.
+
+--no-ext-diff::
+       Disallow external diff drivers.
+
 For more detailed explanation on these common options, see also
 link:diffcore.html[diffcore documentation].