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Documentation: usage for diff combined commits

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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>
This commit is contained in:
Chris Torek 2020-06-12 16:20:00 +00:00 committed by Junio C Hamano
parent 8bfcb3a690
commit b7e10b2ca2
2 changed files with 23 additions and 5 deletions
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20
Documentation/git-diff.txt
View File

@ -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
---

8
builtin/diff.c
View File

@ -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)
{