diff options
Diffstat (limited to 'Documentation/diff-generate-patch.txt')
| -rw-r--r-- | Documentation/diff-generate-patch.txt | 37 |
1 files changed, 22 insertions, 15 deletions
diff --git a/Documentation/diff-generate-patch.txt b/Documentation/diff-generate-patch.txt index e8ed647..4b5aa5c 100644 --- a/Documentation/diff-generate-patch.txt +++ b/Documentation/diff-generate-patch.txt @@ -1,3 +1,4 @@ +[[generate_patch_text_with_p]] Generating patch text with -p ----------------------------- @@ -10,12 +11,13 @@ linkgit:git-diff-tree[1], or linkgit:git-diff-files[1] with the `-p` option produces patch text. You can customize the creation of patch text via the -`GIT_EXTERNAL_DIFF` and the `GIT_DIFF_OPTS` environment variables. +`GIT_EXTERNAL_DIFF` and the `GIT_DIFF_OPTS` environment variables +(see linkgit:git[1]), and the `diff` attribute (see linkgit:gitattributes[5]). 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 by a "git diff" header that looks like this: diff --git a/file1 b/file2 + @@ -23,9 +25,9 @@ The `a/` and `b/` filenames are the same unless rename/copy is involved. Especially, even for a creation or a deletion, `/dev/null` is _not_ used in place of the `a/` or `b/` filenames. + -When rename/copy is involved, `file1` and `file2` show the +When a rename/copy is involved, `file1` and `file2` show the name of the source file of the rename/copy and the name of -the file that rename/copy produces, respectively. +the file that the rename/copy produces, respectively. 2. It is followed by one or more extended header lines: @@ -73,6 +75,11 @@ separate lines indicate the old and the new mode. rename from b rename to a +5. Hunk headers mention the name of the function to which the hunk + applies. See "Defining a custom hunk-header" in + linkgit:gitattributes[5] for details of how to tailor this to + specific languages. + Combined diff format -------------------- @@ -80,9 +87,9 @@ 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 a specific format. A "combined diff" format looks like this: @@ -116,7 +123,7 @@ index fabadb8,cc95eb0..4866510 for_each_ref(get_name); ------------ -1. It is preceded with a "git diff" header, that looks like +1. It is preceded by a "git diff" header, that looks like this (when the `-c` option is used): diff --combined file @@ -135,22 +142,22 @@ or like this (when the `--cc` option is used): + The `mode <mode>,<mode>..<mode>` line appears only if at least one of 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 +information about detected content movement (renames and +copying detection) are designed to work with the diff of two <tree-ish> and are not used by combined diff format. -3. It is followed by two-line from-file/to-file header +3. It is followed by a two-line from-file/to-file header: --- a/file +++ b/file + -Similar to two-line header for traditional 'unified' diff +Similar to the two-line header for the traditional 'unified' diff format, `/dev/null` is used to signal created or deleted files. + However, if the --combined-all-paths option is provided, instead of a -two-line from-file/to-file you get a N+1 line from-file/to-file header, -where N is the number of parents in the merge commit +two-line from-file/to-file, you get an N+1 line from-file/to-file header, +where N is the number of parents in the merge commit: --- a/file --- a/file @@ -190,7 +197,7 @@ added, from the point of view of that parent). In the above example output, the function signature was changed from both files (hence two `-` removals from both file1 and file2, plus `++` to mean one line that was added does not appear -in either file1 or file2). Also eight other lines are the same +in either file1 or file2). Also, eight other lines are the same from file1 but do not appear in file2 (hence prefixed with `+`). When shown by `git diff-tree -c`, it compares the parents of a |