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| author | René Scharfe <l.s.r@web.de> | 2016-09-14 18:05:27 +0200 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2016-09-14 16:07:21 -0700 |
| commit | 45d2f75f913c0545be473db1dc2595a1600413f5 (patch) | |
| tree | 7e8fdfcb8af1d601222425123753df23686c91ff | |
| parent | 0202c411edc25940cc381bf317badcdf67670be4 (diff) | |
| download | git-rs/xdiff-merge-overlapping-hunks-for-W-context.tar.gz | |
xdiff: fix merging of hunks with -W context and -u contextrs/xdiff-merge-overlapping-hunks-for-W-context
If the function context for a hunk (with -W) reaches the beginning of
the next hunk then we need to merge these two -- otherwise we'd show
some lines twice, which looks strange and even confuses git apply. We
already do this checking and merging in xdl_emit_diff(), but forget to
consider regular context (with -u or -U).
Fix that by merging hunks already if function context of the first one
touches or overlaps regular context of the second one.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rwxr-xr-x | t/t4051-diff-function-context.sh | 25 | ||||
| -rw-r--r-- | xdiff/xemit.c | 2 |
2 files changed, 26 insertions, 1 deletions
diff --git a/t/t4051-diff-function-context.sh b/t/t4051-diff-function-context.sh index b79b87790b..6154acb456 100755 --- a/t/t4051-diff-function-context.sh +++ b/t/t4051-diff-function-context.sh @@ -67,6 +67,15 @@ test_expect_success 'setup' ' commit_and_tag long_common_tail file.c && git checkout initial && + cat "$dir/hello.c" "$dir/dummy.c" >file.c && + commit_and_tag hello_dummy file.c && + + # overlap function context of 1st change and -u context of 2nd change + grep -v "delete me from hello" <"$dir/hello.c" >file.c && + sed 2p <"$dir/dummy.c" >>file.c && + commit_and_tag changed_hello_dummy file.c && + + git checkout initial && grep -v "delete me from hello" <file.c >file.c.new && mv file.c.new file.c && cat "$dir/appended1.c" >>file.c && @@ -179,4 +188,20 @@ test_expect_success ' context does not include other functions' ' test $(grep -c "^[ +-].*Begin" changed_hello_appended.diff) -le 2 ' +check_diff changed_hello_dummy 'changed two consecutive functions' + +test_expect_success ' context includes begin' ' + grep "^ .*Begin of hello" changed_hello_dummy.diff && + grep "^ .*Begin of dummy" changed_hello_dummy.diff +' + +test_expect_success ' context includes end' ' + grep "^ .*End of hello" changed_hello_dummy.diff && + grep "^ .*End of dummy" changed_hello_dummy.diff +' + +test_expect_success ' overlapping hunks are merged' ' + test $(grep -c "^@@" changed_hello_dummy.diff) -eq 1 +' + test_done diff --git a/xdiff/xemit.c b/xdiff/xemit.c index 49aa16ff78..5079029174 100644 --- a/xdiff/xemit.c +++ b/xdiff/xemit.c @@ -248,7 +248,7 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, if (xche->next) { long l = XDL_MIN(xche->next->i1, xe->xdf1.nrec - 1); - if (l <= e1 || + if (l - xecfg->ctxlen <= e1 || get_func_line(xe, xecfg, NULL, l, e1) < 0) { xche = xche->next; goto post_context_calculation; |