diff --dirstat-by-file: count changed files, not lines

This new option --dirstat-by-file is the same as --dirstat, but it
counts "impacted files" instead of "impacted lines" (lines that are
added or removed).

Signed-off-by: Heikki Orsila <heikki.orsila@iki.fi>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index 6e268326da9e34882313b7b3d094a617c3966d29..7788d4fa4a1209cbed564a20f882f0946ba400cf 100644 (file)
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -65,6 +65,9 @@ endif::git-format-patch[]
        can be set with "--dirstat=limit". Changes in a child directory is not
        counted for the parent directory, unless "--cumulative" is used.
 
+--dirstat-by-file[=limit]::
+       Same as --dirstat, but counts changed files instead of lines.
+
 --summary::
        Output a condensed summary of extended header information
        such as creations, renames and mode changes.

diff --git a/diff.c b/diff.c
index cbd151bbc80dbd0410f47230bbb645235131c754..2de86eb7603c1de1b5861168a7152c1f0f8cbf17 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -1110,9 +1110,13 @@ static void show_dirstat(struct diff_options *options)
                /*
                 * Original minus copied is the removed material,
                 * added is the new material.  They are both damages
-                * made to the preimage.
+                * made to the preimage. In --dirstat-by-file mode, count
+                * damaged files, not damaged lines. This is done by
+                * counting only a single damaged line per file.
                 */
                damage = (p->one->size - copied) + added;
+               if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE) && damage > 0)
+                       damage = 1;
 
                ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc);
                dir.files[dir.nr].name = name;
@@ -2476,6 +2480,10 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
        else if (!strcmp(arg, "--cumulative")) {
                options->output_format |= DIFF_FORMAT_DIRSTAT;
                DIFF_OPT_SET(options, DIRSTAT_CUMULATIVE);
+       } else if (opt_arg(arg, 0, "dirstat-by-file",
+                          &options->dirstat_percent)) {
+               options->output_format |= DIFF_FORMAT_DIRSTAT;
+               DIFF_OPT_SET(options, DIRSTAT_BY_FILE);
        }
        else if (!strcmp(arg, "--check"))
                options->output_format |= DIFF_FORMAT_CHECKDIFF;

diff --git a/diff.h b/diff.h
index 7f53bebf335148a5f623b5fcbe6142e6c4b53282..c34688881d7ea80ecbe2ff1b3cca880f6f06f598 100644 (file)
--- a/diff.h
+++ b/diff.h
@@ -64,6 +64,7 @@ typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
 #define DIFF_OPT_RELATIVE_NAME       (1 << 17)
 #define DIFF_OPT_IGNORE_SUBMODULES   (1 << 18)
 #define DIFF_OPT_DIRSTAT_CUMULATIVE  (1 << 19)
+#define DIFF_OPT_DIRSTAT_BY_FILE     (1 << 20)
 #define DIFF_OPT_TST(opts, flag)    ((opts)->flags & DIFF_OPT_##flag)
 #define DIFF_OPT_SET(opts, flag)    ((opts)->flags |= DIFF_OPT_##flag)
 #define DIFF_OPT_CLR(opts, flag)    ((opts)->flags &= ~DIFF_OPT_##flag)