range-diff: indent special lines as context

The range-diff coloring is a bit fuzzy when it comes to special lines of
a diff, such as indicating new and old files with +++ and ---, as it
would pickup the first character and interpret it for its coloring, which
seems annoying as in regular diffs, these lines are colored bold via
DIFF_METAINFO.

By indenting these lines by a white space, they will be treated as context
which is much more useful, an example [1] on the range diff series itself:

[...]
+ diff --git a/Documentation/git-range-diff.txt b/Documentation/git-range-diff.txt
+ new file mode 100644
+ --- /dev/null
+ +++ b/Documentation/git-range-diff.txt
+@@
++git-range-diff(1)
[...]
+
diff --git a/Makefile b/Makefile
--- a/Makefile
+++ b/Makefile
[...]

The first lines that introduce the new file for the man page will have the
'+' sign colored and the rest of the line will be bold.

The later lines that indicate a change to the Makefile will be treated as
context both in the outer and inner diff, such that those lines stay
regular color.

[1] ./git-range-diff pr-1/dscho/branch-diff-v3...pr-1/dscho/branch-diff-v4
These tags are found at https://github.com/gitgitgadget/git

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/range-diff.c b/range-diff.c
index a906d25f1396c74685c2ab979491d47b7d27b39a..3e9b9844012dac7fb4a0e80451e0d459da9a820e 100644 (file)
--- a/range-diff.c
+++ b/range-diff.c
@@ -90,6 +90,7 @@ static int read_patches(const char *range, struct string_list *list)
                        strbuf_addch(&buf, '\n');
                        if (!util->diff_offset)
                                util->diff_offset = buf.len;
+                       strbuf_addch(&buf, ' ');
                        strbuf_addbuf(&buf, &line);
                } else if (in_header) {
                        if (starts_with(line.buf, "Author: ")) {
@@ -126,6 +127,7 @@ static int read_patches(const char *range, struct string_list *list)
                        strbuf_addch(&buf, ' ');
                        strbuf_add(&buf, line.buf + 1, line.len - 1);
                } else {
+                       strbuf_addch(&buf, ' ');
                        strbuf_addbuf(&buf, &line);
                }
 

diff --git a/t/t3206-range-diff.sh b/t/t3206-range-diff.sh
index 7dc7c80a1dee3463d82dab576a1dbbb9908729a2..c94f9bf5ee12c1db38764ac6e51bbc011d3a2619 100755 (executable)
--- a/t/t3206-range-diff.sh
+++ b/t/t3206-range-diff.sh
@@ -133,9 +133,9 @@ test_expect_success 'changed message' '
            Z
            +    Also a silly comment here!
            +
-           Zdiff --git a/file b/file
-           Z--- a/file
-           Z+++ b/file
+           Z diff --git a/file b/file
+           Z --- a/file
+           Z +++ b/file
        3:  147e64e = 3:  b9cb956 s/11/B/
        4:  a63e992 = 4:  8add5f1 s/12/B/
        EOF
@@ -152,9 +152,9 @@ test_expect_success 'dual-coloring' '
        :     <RESET>
        :    <REVERSE><GREEN>+<RESET><BOLD>    Also a silly comment here!<RESET>
        :    <REVERSE><GREEN>+<RESET>
-       :     diff --git a/file b/file<RESET>
-       :    <RED> --- a/file<RESET>
-       :    <GREEN> +++ b/file<RESET>
+       :      diff --git a/file b/file<RESET>
+       :      --- a/file<RESET>
+       :      +++ b/file<RESET>
        :<RED>3:  0559556 <RESET><YELLOW>!<RESET><GREEN> 3:  b9cb956<RESET><YELLOW> s/11/B/<RESET>
        :    <REVERSE><CYAN>@@ -10,7 +10,7 @@<RESET>
        :      9<RESET>