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-rw-r--r--Documentation/diff-options.txt4
-rwxr-xr-xcontrib/completion/git-completion.bash2
-rw-r--r--diff.c4
-rw-r--r--diff.h1
-rwxr-xr-xt/t4032-diff-inter-hunk-context.sh92
-rw-r--r--xdiff/xdiff.h1
-rw-r--r--xdiff/xemit.c3
7 files changed, 106 insertions, 1 deletions
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index b432d2518..671f533ca 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -205,6 +205,10 @@ endif::git-format-patch[]
differences even if one line has whitespace where the other
line has none.
+--inter-hunk-context=<lines>::
+ Show the context between diff hunks, up to the specified number
+ of lines, thereby fusing hunks that are close to each other.
+
--exit-code::
Make the program exit with codes similar to diff(1).
That is, it exits with 1 if there were differences and
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 3b25d4809..8ec782dc5 100755
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -776,6 +776,7 @@ _git_diff ()
--no-ext-diff
--no-prefix --src-prefix= --dst-prefix=
--base --ours --theirs
+ --inter-hunk-context=
"
return
;;
@@ -967,6 +968,7 @@ _git_log ()
--color-words --walk-reflogs
--parents --children --full-history
--merge
+ --inter-hunk-context=
"
return
;;
diff --git a/diff.c b/diff.c
index c159a5fc6..d23548292 100644
--- a/diff.c
+++ b/diff.c
@@ -1469,6 +1469,7 @@ static void builtin_diff(const char *name_a,
ecbdata.file = o->file;
xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts;
xecfg.ctxlen = o->context;
+ xecfg.interhunkctxlen = o->interhunkcontext;
xecfg.flags = XDL_EMIT_FUNCNAMES;
if (pe)
xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags);
@@ -2538,6 +2539,9 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
options->b_prefix = arg + 13;
else if (!strcmp(arg, "--no-prefix"))
options->a_prefix = options->b_prefix = "";
+ else if (opt_arg(arg, '\0', "inter-hunk-context",
+ &options->interhunkcontext))
+ ;
else if (!prefixcmp(arg, "--output=")) {
options->file = fopen(arg + strlen("--output="), "w");
options->close_file = 1;
diff --git a/diff.h b/diff.h
index 42582edee..4d5a32781 100644
--- a/diff.h
+++ b/diff.h
@@ -78,6 +78,7 @@ struct diff_options {
const char *a_prefix, *b_prefix;
unsigned flags;
int context;
+ int interhunkcontext;
int break_opt;
int detect_rename;
int skip_stat_unmatch;
diff --git a/t/t4032-diff-inter-hunk-context.sh b/t/t4032-diff-inter-hunk-context.sh
new file mode 100755
index 000000000..e4e3e28fc
--- /dev/null
+++ b/t/t4032-diff-inter-hunk-context.sh
@@ -0,0 +1,92 @@
+#!/bin/sh
+
+test_description='diff hunk fusing'
+
+. ./test-lib.sh
+
+f() {
+ echo $1
+ i=1
+ while test $i -le $2
+ do
+ echo $i
+ i=$(expr $i + 1)
+ done
+ echo $3
+}
+
+t() {
+ case $# in
+ 4) hunks=$4; cmd="diff -U$3";;
+ 5) hunks=$5; cmd="diff -U$3 --inter-hunk-context=$4";;
+ esac
+ label="$cmd, $1 common $2"
+ file=f$1
+ expected=expected.$file.$3.$hunks
+
+ if ! test -f $file
+ then
+ f A $1 B >$file
+ git add $file
+ git commit -q -m. $file
+ f X $1 Y >$file
+ fi
+
+ test_expect_success "$label: count hunks ($hunks)" "
+ test $(git $cmd $file | grep '^@@ ' | wc -l) = $hunks
+ "
+
+ test -f $expected &&
+ test_expect_success "$label: check output" "
+ git $cmd $file | grep -v '^index ' >actual &&
+ test_cmp $expected actual
+ "
+}
+
+cat <<EOF >expected.f1.0.1 || exit 1
+diff --git a/f1 b/f1
+--- a/f1
++++ b/f1
+@@ -1,3 +1,3 @@
+-A
++X
+ 1
+-B
++Y
+EOF
+
+cat <<EOF >expected.f1.0.2 || exit 1
+diff --git a/f1 b/f1
+--- a/f1
++++ b/f1
+@@ -1 +1 @@
+-A
++X
+@@ -3 +3 @@ A
+-B
++Y
+EOF
+
+# common lines ctx intrctx hunks
+t 1 line 0 2
+t 1 line 0 0 2
+t 1 line 0 1 1
+t 1 line 0 2 1
+t 1 line 1 1
+
+t 2 lines 0 2
+t 2 lines 0 0 2
+t 2 lines 0 1 2
+t 2 lines 0 2 1
+t 2 lines 1 1
+
+t 3 lines 1 2
+t 3 lines 1 0 2
+t 3 lines 1 1 1
+t 3 lines 1 2 1
+
+t 9 lines 3 2
+t 9 lines 3 2 2
+t 9 lines 3 3 1
+
+test_done
diff --git a/xdiff/xdiff.h b/xdiff/xdiff.h
index 84fff583e..361f80231 100644
--- a/xdiff/xdiff.h
+++ b/xdiff/xdiff.h
@@ -84,6 +84,7 @@ typedef long (*find_func_t)(const char *line, long line_len, char *buffer, long
typedef struct s_xdemitconf {
long ctxlen;
+ long interhunkctxlen;
unsigned long flags;
find_func_t find_func;
void *find_func_priv;
diff --git a/xdiff/xemit.c b/xdiff/xemit.c
index 4625c1b42..05bfa41f1 100644
--- a/xdiff/xemit.c
+++ b/xdiff/xemit.c
@@ -59,9 +59,10 @@ static int xdl_emit_record(xdfile_t *xdf, long ri, char const *pre, xdemitcb_t *
*/
xdchange_t *xdl_get_hunk(xdchange_t *xscr, xdemitconf_t const *xecfg) {
xdchange_t *xch, *xchp;
+ long max_common = 2 * xecfg->ctxlen + xecfg->interhunkctxlen;
for (xchp = xscr, xch = xscr->next; xch; xchp = xch, xch = xch->next)
- if (xch->i1 - (xchp->i1 + xchp->chg1) > 2 * xecfg->ctxlen)
+ if (xch->i1 - (xchp->i1 + xchp->chg1) > max_common)
break;
return xchp;