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index e4520e28e53661159454e02c703be772d43bbc09..9709c35c98bc678d1f2e339c8e2d4bbcd7e6231f 100644 (file)
-The output format from "git-diff-index", "git-diff-tree" and
-"git-diff-files" are very similar.
+The output format from "git-diff-index", "git-diff-tree",
+"git-diff-files" and "git diff --raw" are very similar.
-These commands all compare two sets of things; what is
+These commands all compare two sets of things; what is
compared differs:
git-diff-index <tree-ish>::
compared differs:
git-diff-index <tree-ish>::
in pathnames are represented as `\t`, `\n`, and `\\`,
respectively.
in pathnames are represented as `\t`, `\n`, and `\\`,
respectively.
+diff format for merges
+----------------------
-Generating patches with -p
---------------------------
-
-When "git-diff-index", "git-diff-tree", or "git-diff-files" are run
-with a '-p' option, they do not produce the output described above;
-instead they produce a patch file.
-
-The patch generation can be customized at two levels.
-
-1. When the environment variable 'GIT_EXTERNAL_DIFF' is not set,
- these commands internally invoke "diff" like this:
+"git-diff-tree", "git-diff-files" and "git-diff --raw"
+can take '-c' or '--cc' option
+to generate diff output also for merge commits. The output differs
+from the format described above in the following way:
- diff -L a/<path> -L b/<path> -pu <old> <new>
-+
-For added files, `/dev/null` is used for <old>. For removed
-files, `/dev/null` is used for <new>
-+
-The "diff" formatting options can be customized via the
-environment variable 'GIT_DIFF_OPTS'. For example, if you
-prefer context diff:
-
- GIT_DIFF_OPTS=-c git-diff-index -p HEAD
-
-
-2. When the environment variable 'GIT_EXTERNAL_DIFF' is set, the
- program named by it is called, instead of the diff invocation
- described above.
-+
-For a path that is added, removed, or modified,
-'GIT_EXTERNAL_DIFF' is called with 7 parameters:
+. there is a colon for each parent
+. there are more "src" modes and "src" sha1
+. status is concatenated status characters for each parent
+. no optional "score" number
+. single path, only for "dst"
- path old-file old-hex old-mode new-file new-hex new-mode
-+
-where:
+Example:
- <old|new>-file:: are files GIT_EXTERNAL_DIFF can use to read the
- contents of <old|new>,
- <old|new>-hex:: are the 40-hexdigit SHA1 hashes,
- <old|new>-mode:: are the octal representation of the file modes.
+------------------------------------------------
+::100644 100644 100644 fabadb8... cc95eb0... 4866510... MM describe.c
+------------------------------------------------
-+
-The file parameters can point at the user's working file
-(e.g. `new-file` in "git-diff-files"), `/dev/null` (e.g. `old-file`
-when a new file is added), or a temporary file (e.g. `old-file` in the
-index). 'GIT_EXTERNAL_DIFF' should not worry about unlinking the
-temporary file --- it is removed when 'GIT_EXTERNAL_DIFF' exits.
+Note that 'combined diff' lists only files which were modified from
+all parents.
-For a path that is unmerged, 'GIT_EXTERNAL_DIFF' is called with 1
-parameter, <path>.
+Generating patches with -p
+--------------------------
-git specific extension to diff format
--------------------------------------
+When "git-diff-index", "git-diff-tree", or "git-diff-files" are run
+with a '-p' option, or "git diff" without the '--raw' option, they
+do not produce the output described above; instead they produce a
+patch file. You can customize the creation of such patches via the
+GIT_EXTERNAL_DIFF and the GIT_DIFF_OPTS environment variables.
-What -p option produces is slightly different from the
-traditional diff format.
+What the -p option produces is slightly different from the traditional
+diff format.
1. It is preceded with a "git diff" header, that looks like
this:
1. It is preceded with a "git diff" header, that looks like
this:
- diff --git a/file1 b/file2
+ diff --git a/file1 b/file2
+
The `a/` and `b/` filenames are the same unless rename/copy is
involved. Especially, even for a creation or a deletion,
+
The `a/` and `b/` filenames are the same unless rename/copy is
involved. Especially, even for a creation or a deletion,
If there is need for such substitution then the whole
pathname is put in double quotes.
If there is need for such substitution then the whole
pathname is put in double quotes.
+The similarity index is the percentage of unchanged lines, and
+the dissimilarity index is the percentage of changed lines. It
+is a rounded down integer, followed by a percent sign. The
+similarity index value of 100% is thus reserved for two equal
+files, while 100% dissimilarity means that no line from the old
+file made it into the new one.
+
combined diff format
--------------------
combined diff format
--------------------
-git-diff-tree and git-diff-files can take '-c' or '--cc' option
-to produce 'combined diff', which looks like this:
+"git-diff-tree", "git-diff-files" and "git-diff" can take '-c' or
+'--cc' option to produce 'combined diff', which looks like this:
------------
diff --combined describe.c
------------
diff --combined describe.c
--- a/describe.c
+++ b/describe.c
@@@ -98,20 -98,12 +98,20 @@@
--- a/describe.c
+++ b/describe.c
@@@ -98,20 -98,12 +98,20 @@@
- return (a_date > b_date) ? -1 : (a_date == b_date) ? 0 : 1;
+ return (a_date > b_date) ? -1 : (a_date == b_date) ? 0 : 1;
}
}
-
+
- static void describe(char *arg)
-static void describe(struct commit *cmit, int last_one)
++static void describe(char *arg, int last_one)
{
+ unsigned char sha1[20];
+ struct commit *cmit;
- static void describe(char *arg)
-static void describe(struct commit *cmit, int last_one)
++static void describe(char *arg, int last_one)
{
+ unsigned char sha1[20];
+ struct commit *cmit;
- struct commit_list *list;
- static int initialized = 0;
- struct commit_name *n;
-
+ struct commit_list *list;
+ static int initialized = 0;
+ struct commit_name *n;
+
+ if (get_sha1(arg, sha1) < 0)
+ usage(describe_usage);
+ cmit = lookup_commit_reference(sha1);
+ if (!cmit)
+ usage(describe_usage);
+
+ if (get_sha1(arg, sha1) < 0)
+ usage(describe_usage);
+ cmit = lookup_commit_reference(sha1);
+ if (!cmit)
+ usage(describe_usage);
+
- if (!initialized) {
- initialized = 1;
- for_each_ref(get_name);
+ if (!initialized) {
+ initialized = 1;
+ for_each_ref(get_name);
------------
1. It is preceded with a "git diff" header, that looks like
------------
1. It is preceded with a "git diff" header, that looks like
deleted file mode <mode>,<mode>
+
The `mode <mode>,<mode>..<mode>` line appears only if at least one of
deleted file mode <mode>,<mode>
+
The `mode <mode>,<mode>..<mode>` line appears only if at least one of
-the <mode> is diferent from the rest. Extended headers with
+the <mode> is different from the rest. Extended headers with
information about detected contents movement (renames and
copying detection) are designed to work with diff of two
<tree-ish> and are not used by combined diff format.
information about detected contents movement (renames and
copying detection) are designed to work with diff of two
<tree-ish> and are not used by combined diff format.
two unresolved merge parents with the working tree file
(i.e. file1 is stage 2 aka "our version", file2 is stage 3 aka
"their version").
two unresolved merge parents with the working tree file
(i.e. file1 is stage 2 aka "our version", file2 is stage 3 aka
"their version").
-