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authorChris Torek <chris.torek@gmail.com>2020-06-12 16:20:00 (GMT)
committerJunio C Hamano <gitster@pobox.com>2020-06-12 17:53:44 (GMT)
commitb7e10b2ca210d6a3647910fdecea33581e4eaf0d (patch)
tree9aa91d4091a4a239cb0dfbf67294a8f6a1eee993
parent8bfcb3a690126e6222f0d4f7012b0f68bb748018 (diff)
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Documentation: usage for diff combined commits
Document the usage for producing combined commits with "git diff". This includes updating the synopsis section. While here, add the three-dot notation to the synopsis. Make "git diff -h" print the same usage summary as the manual page synopsis, minus the "A..B" form, which is now discouraged. Signed-off-by: Chris Torek <chris.torek@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--Documentation/git-diff.txt20
-rw-r--r--builtin/diff.c8
2 files changed, 23 insertions, 5 deletions
diff --git a/Documentation/git-diff.txt b/Documentation/git-diff.txt
index 37781cf..1018110 100644
--- a/Documentation/git-diff.txt
+++ b/Documentation/git-diff.txt
@@ -11,15 +11,17 @@ SYNOPSIS
[verse]
'git diff' [<options>] [<commit>] [--] [<path>...]
'git diff' [<options>] --cached [<commit>] [--] [<path>...]
-'git diff' [<options>] <commit> <commit> [--] [<path>...]
+'git diff' [<options>] <commit> [<commit>...] <commit> [--] [<path>...]
+'git diff' [<options>] <commit>...<commit> [--] [<path>...]
'git diff' [<options>] <blob> <blob>
'git diff' [<options>] --no-index [--] <path> <path>
DESCRIPTION
-----------
Show changes between the working tree and the index or a tree, changes
-between the index and a tree, changes between two trees, changes between
-two blob objects, or changes between two files on disk.
+between the index and a tree, changes between two trees, changes resulting
+from a merge, changes between two blob objects, or changes between two
+files on disk.
'git diff' [<options>] [--] [<path>...]::
@@ -67,6 +69,15 @@ two blob objects, or changes between two files on disk.
one side is omitted, it will have the same effect as
using HEAD instead.
+'git diff' [<options>] <commit> [<commit>...] <commit> [--] [<path>...]::
+
+ This form is to view the results of a merge commit. The first
+ listed <commit> must be the merge itself; the remaining two or
+ more commits should be its parents. A convenient way to produce
+ the desired set of revisions is to use the {caret}@ suffix.
+ For instance, if `master` names a merge commit, `git diff master
+ master^@` gives the same combined diff as `git show master`.
+
'git diff' [<options>] <commit>\...<commit> [--] [<path>...]::
This form is to view the changes on the branch containing
@@ -196,7 +207,8 @@ linkgit:git-difftool[1],
linkgit:git-log[1],
linkgit:gitdiffcore[7],
linkgit:git-format-patch[1],
-linkgit:git-apply[1]
+linkgit:git-apply[1],
+linkgit:git-show[1]
GIT
---
diff --git a/builtin/diff.c b/builtin/diff.c
index 57bd6c8..96ee2cb 100644
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -24,7 +24,13 @@
#define DIFF_NO_INDEX_IMPLICIT 2
static const char builtin_diff_usage[] =
-"git diff [<options>] [<commit> [<commit>]] [--] [<path>...]";
+"git diff [<options>] [<commit>] [--] [<path>...]\n"
+" or: git diff [<options>] --cached [<commit>] [--] [<path>...]\n"
+" or: git diff [<options>] <commit> [<commit>...] <commit> [--] [<path>...]\n"
+" or: git diff [<options>] <commit>...<commit>] [--] [<path>...]\n"
+" or: git diff [<options>] <blob> <blob>]\n"
+" or: git diff [<options>] --no-index [--] <path> <path>]\n"
+COMMON_DIFF_OPTIONS_HELP;
static const char *blob_path(struct object_array_entry *entry)
{