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-rw-r--r--Documentation/diff-generate-patch.txt6
-rw-r--r--Documentation/diff-options.txt51
-rw-r--r--Documentation/git-log.txt46
-rw-r--r--Documentation/git-show.txt7
-rw-r--r--Documentation/rev-list-options.txt5
5 files changed, 71 insertions, 44 deletions
diff --git a/Documentation/diff-generate-patch.txt b/Documentation/diff-generate-patch.txt
index b10ff4caa6..2db8eacc3e 100644
--- a/Documentation/diff-generate-patch.txt
+++ b/Documentation/diff-generate-patch.txt
@@ -81,9 +81,9 @@ Combined diff format
Any diff-generating command can take the `-c` or `--cc` option to
produce a 'combined diff' when showing a merge. This is the default
format when showing merges with linkgit:git-diff[1] or
-linkgit:git-show[1]. Note also that you can give the `-m` option to any
-of these commands to force generation of diffs with individual parents
-of a merge.
+linkgit:git-show[1]. Note also that you can give suitable
+`--diff-merges` option to any of these commands to force generation of
+diffs in specific format.
A "combined diff" format looks like this:
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index 746b144c76..e5733ccb2d 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -33,6 +33,57 @@ endif::git-diff[]
show the patch by default, or to cancel the effect of `--patch`.
endif::git-format-patch[]
+ifdef::git-log[]
+--diff-merges=(off|none|first-parent|1|separate|m|combined|c|dense-combined|cc)::
+--no-diff-merges::
+ Specify diff format to be used for merge commits. Default is
+ {diff-merges-default} unless `--first-parent` is in use, in which case
+ `first-parent` is the default.
++
+--diff-merges=(off|none):::
+--no-diff-merges:::
+ Disable output of diffs for merge commits. Useful to override
+ implied value.
++
+--diff-merges=first-parent:::
+--diff-merges=1:::
+ This option makes merge commits show the full diff with
+ respect to the first parent only.
++
+--diff-merges=separate:::
+--diff-merges=m:::
+-m:::
+ This makes merge commits show the full diff with respect to
+ each of the parents. Separate log entry and diff is generated
+ for each parent. `-m` doesn't produce any output without `-p`.
++
+--diff-merges=combined:::
+--diff-merges=c:::
+-c:::
+ With this option, diff output for a merge commit shows the
+ differences from each of the parents to the merge result
+ simultaneously instead of showing pairwise diff between a
+ parent and the result one at a time. Furthermore, it lists
+ only files which were modified from all parents. `-c` implies
+ `-p`.
++
+--diff-merges=dense-combined:::
+--diff-merges=cc:::
+--cc:::
+ With this option the output produced by
+ `--diff-merges=combined` is further compressed by omitting
+ uninteresting hunks whose contents in the parents have only
+ two variants and the merge result picks one of them without
+ modification. `--cc` implies `-p`.
+
+--combined-all-paths::
+ This flag causes combined diffs (used for merge commits) to
+ list the name of the file from all parents. It thus only has
+ effect when `--diff-merges=[dense-]combined` is in use, and
+ is likely only useful if filename changes are detected (i.e.
+ when either rename or copy detection have been requested).
+endif::git-log[]
+
-U<n>::
--unified=<n>::
Generate diffs with <n> lines of context instead of
diff --git a/Documentation/git-log.txt b/Documentation/git-log.txt
index dd189a353a..1bbf865a1b 100644
--- a/Documentation/git-log.txt
+++ b/Documentation/git-log.txt
@@ -107,47 +107,15 @@ DIFF FORMATTING
By default, `git log` does not generate any diff output. The options
below can be used to show the changes made by each commit.
-Note that unless one of `-c`, `--cc`, or `-m` is given, merge commits
-will never show a diff, even if a diff format like `--patch` is
-selected, nor will they match search options like `-S`. The exception is
-when `--first-parent` is in use, in which merges are treated like normal
-single-parent commits (this can be overridden by providing a
-combined-diff option or with `--no-diff-merges`).
-
--c::
- With this option, diff output for a merge commit
- shows the differences from each of the parents to the merge result
- simultaneously instead of showing pairwise diff between a parent
- and the result one at a time. Furthermore, it lists only files
- which were modified from all parents.
-
---cc::
- This flag implies the `-c` option and further compresses the
- patch output by omitting uninteresting hunks whose contents in
- the parents have only two variants and the merge result picks
- one of them without modification.
-
---combined-all-paths::
- This flag causes combined diffs (used for merge commits) to
- list the name of the file from all parents. It thus only has
- effect when -c or --cc are specified, and is likely only
- useful if filename changes are detected (i.e. when either
- rename or copy detection have been requested).
-
--m::
- This flag makes the merge commits show the full diff like
- regular commits; for each merge parent, a separate log entry
- and diff is generated. An exception is that only diff against
- the first parent is shown when `--first-parent` option is given;
- in that case, the output represents the changes the merge
- brought _into_ the then-current branch.
-
---diff-merges=off::
---no-diff-merges::
- Disable output of diffs for merge commits (default). Useful to
- override `-m`, `-c`, or `--cc`.
+Note that unless one of `--diff-merges` variants (including short
+`-m`, `-c`, and `--cc` options) is explicitly given, merge commits
+will not show a diff, even if a diff format like `--patch` is
+selected, nor will they match search options like `-S`. The exception
+is when `--first-parent` is in use, in which case `first-parent` is
+the default format.
:git-log: 1
+:diff-merges-default: `off`
include::diff-options.txt[]
include::diff-generate-patch.txt[]
diff --git a/Documentation/git-show.txt b/Documentation/git-show.txt
index fcf528c1b3..2b1bc7288d 100644
--- a/Documentation/git-show.txt
+++ b/Documentation/git-show.txt
@@ -45,10 +45,13 @@ include::pretty-options.txt[]
include::pretty-formats.txt[]
-COMMON DIFF OPTIONS
--------------------
+DIFF FORMATTING
+---------------
+The options below can be used to change the way `git show` generates
+diff output.
:git-log: 1
+:diff-merges-default: `dense-combined`
include::diff-options.txt[]
include::diff-generate-patch.txt[]
diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt
index 002379056a..96cc89d157 100644
--- a/Documentation/rev-list-options.txt
+++ b/Documentation/rev-list-options.txt
@@ -130,6 +130,11 @@ parents) and `--max-parents=-1` (negative numbers denote no upper limit).
this option allows you to ignore the individual commits
brought in to your history by such a merge.
+ifdef::git-log[]
+ This option also changes default diff format for merge commits
+ to `first-parent`, see `--diff-merges=first-parent` for details.
+endif::git-log[]
+
--not::
Reverses the meaning of the '{caret}' prefix (or lack thereof)
for all following revision specifiers, up to the next `--not`.