Antoine Pelisse <[email protected]> writes:
> It might be kind of noisy, but I think trying to improve the solution
> might lead to over-engineering.
> How would we compute the "minimal distance between interesting and
> blank" so that the blank becomes interesting ?
> Using the context size for that is quite convenient, while creating
> another variable would probably become overkill..
>
> The original goal is to remove hunks created solely for
> addition/suppression, and I think it's what it should do for the
> moment.
Something like this on top of your original one is what I had in
mind as a starting point.
t/t4015-diff-whitespace.sh | 5 +----
xdiff/xemit.c | 45 ++++++++++++++++++++++++++-------------------
2 files changed, 27 insertions(+), 23 deletions(-)
diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh
index b3c4fcc..acc2159 100755
--- a/t/t4015-diff-whitespace.sh
+++ b/t/t4015-diff-whitespace.sh
@@ -185,7 +185,7 @@ test_expect_success 'ignore-blank-lines: with changes' '
git diff --ignore-blank-lines >out.tmp &&
sed -e "1,/^+++ b\/x/d" <out.tmp >out &&
cat <<-\EOF >expect &&
- @@ -1,6 +2,7 @@
+ @@ -1,11 +2,14 @@
1
2
3
@@ -193,9 +193,6 @@ test_expect_success 'ignore-blank-lines: with changes' '
4
5
6
- @@ -5,7 +7,9 @@
- 5
- 6
7
+
8
diff --git a/xdiff/xemit.c b/xdiff/xemit.c
index 52dfef8..27e1105 100644
--- a/xdiff/xemit.c
+++ b/xdiff/xemit.c
@@ -59,32 +59,39 @@ static int xdl_emit_record(xdfile_t *xdf, long ri, char
const *pre, xdemitcb_t *
* Also advance xscr if the first changes must be discareded.
*/
xdchange_t *xdl_get_hunk(xdchange_t **xscr, xdemitconf_t const *xecfg) {
- xdchange_t *xch, *xchp;
+ xdchange_t *xch, *xchp = NULL, *xch_start = NULL;
long max_common = 2 * xecfg->ctxlen + xecfg->interhunkctxlen;
- long ignorable_context = max_common / 2 - 1;
- int interesting = 0;
- for (xchp = *xscr, xch = (*xscr)->next; xch; xchp = xch, xch =
xch->next) {
- long thresh;
- if (xchp->ignore || xch->ignore)
- thresh = ignorable_context;
- else
- thresh = max_common;
-
- if (!xchp->ignore)
- interesting = 1;
+ /* Skip the ones that can be ignored from the beginning */
+ for (xch = *xscr; xch; xch = xch->next) {
+ if (xch->ignore)
+ continue;
+ xch_start = xch;
+ break;
+ }
- if (xch->i1 - (xchp->i1 + xchp->chg1) > thresh) {
- if (interesting)
+ for (xchp = xch_start; xchp; ) {
+ /* Find the next one that is not ignored */
+ for (xch = xchp->next; xch; xch = xch->next)
+ if (!xch->ignore)
break;
- else
- *xscr = xch;
+ if (!xch)
+ break; /* show xch_start thru xchp */
+
+ /* are these hunks close enough? */
+ if ((xchp->i1 + xchp->chg1) - xch->i1 < max_common) {
+ xchp = xch;
+ continue;
}
- }
- if (!interesting && xchp->ignore)
- *xscr = NULL;
+ /*
+ * otherwise, xchp is the last one (inclusive) we want
+ * to coalesce into a single output hunk.
+ */
+ break;
+ }
+ *xscr = xch_start;
return xchp;
}
--
1.8.3-477-gc2fede3
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