From d8faea9d182bd0ca2624be74d9dc32b187618840 Mon Sep 17 00:00:00 2001 From: Jakub Narebski Date: Mon, 9 Aug 2010 10:50:53 -0400 Subject: [PATCH] diff: strip extra "/" when stripping prefix There are two ways a user might want to use "diff --relative": 1. For a file in a directory, like "subdir/file", the user can use "--relative=subdir/" to strip the directory. 2. To strip part of a filename, like "foo-10", they can use "--relative=foo-". We currently handle both of those situations. However, if the user passes "--relative=subdir" (without the trailing slash), we produce inconsistent results. For the unified diff format, we collapse the double-slash of "a//file" correctly into "a/file". But for other formats (raw, stat, name-status), we end up with "/file". We can do what the user means here and strip the extra "/" (and only a slash). We are not hurting any existing users of (2) above with this behavior change because the existing output for this case was nonsensical. Patch by Jakub, tests and commit message by Jeff King. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- diff.c | 10 +++++-- t/t4045-diff-relative.sh | 61 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 69 insertions(+), 2 deletions(-) create mode 100755 t/t4045-diff-relative.sh diff --git a/diff.c b/diff.c index 782896db55..bf65892f78 100644 --- a/diff.c +++ b/diff.c @@ -2704,10 +2704,16 @@ static void diff_fill_sha1_info(struct diff_filespec *one) static void strip_prefix(int prefix_length, const char **namep, const char **otherp) { /* Strip the prefix but do not molest /dev/null and absolute paths */ - if (*namep && **namep != '/') + if (*namep && **namep != '/') { *namep += prefix_length; - if (*otherp && **otherp != '/') + if (**namep == '/') + ++*namep; + } + if (*otherp && **otherp != '/') { *otherp += prefix_length; + if (**otherp == '/') + ++*otherp; + } } static void run_diff(struct diff_filepair *p, struct diff_options *o) diff --git a/t/t4045-diff-relative.sh b/t/t4045-diff-relative.sh new file mode 100755 index 0000000000..8a3c63b9e2 --- /dev/null +++ b/t/t4045-diff-relative.sh @@ -0,0 +1,61 @@ +#!/bin/sh + +test_description='diff --relative tests' +. ./test-lib.sh + +test_expect_success 'setup' ' + git commit --allow-empty -m empty && + echo content >file1 && + mkdir subdir && + echo other content >subdir/file2 && + git add . && + git commit -m one +' + +check_diff() { +expect=$1; shift +cat >expected <actual && + test_cmp expected actual +" +} + +check_stat() { +expect=$1; shift +cat >expected <actual && + test_cmp expected actual +" +} + +check_raw() { +expect=$1; shift +cat >expected <actual && + test_cmp expected actual +" +} + +for type in diff stat raw; do + check_$type file2 --relative=subdir/ + check_$type file2 --relative=subdir + check_$type dir/file2 --relative=sub +done + +test_done