Merge branch 'jc/better-conflict-resolution'

* jc/better-conflict-resolution:
  Fix AsciiDoc errors in merge documentation
  git-merge documentation: describe how conflict is presented
  checkout --conflict=<style>: recreate merge in a non-default style
  checkout -m: recreate merge when checking out of unmerged index
  git-merge-recursive: learn to honor merge.conflictstyle
  merge.conflictstyle: choose between "merge" and "diff3 -m" styles
  rerere: understand "diff3 -m" style conflicts with the original
  rerere.c: use symbolic constants to keep track of parsing states
  xmerge.c: "diff3 -m" style clips merge reduction level to EAGER or less
  xmerge.c: minimum readability fixups
  xdiff-merge: optionally show conflicts in "diff3 -m" style
  xdl_fill_merge_buffer(): separate out a too deeply nested function
  checkout --ours/--theirs: allow checking out one side of a conflicting merge
  checkout -f: allow ignoring unmerged paths when checking out of the index

Conflicts:
	Documentation/git-checkout.txt
	builtin-checkout.c
	builtin-merge-recursive.c
	t/t7201-co.sh

1 files changed, 19 insertions, 10 deletions

diff --git a/rerere.c b/rerere.c
index c38886b22a..8447caeebc 100644
--- a/rerere.c
+++ b/rerere.c
@@ -75,7 +75,10 @@ static int handle_file(const char *path,
 {
 	SHA_CTX ctx;
 	char buf[1024];
-	int hunk = 0, hunk_no = 0;
+	int hunk_no = 0;
+	enum {
+		RR_CONTEXT = 0, RR_SIDE_1, RR_SIDE_2, RR_ORIGINAL,
+	} hunk = RR_CONTEXT;
 	struct strbuf one, two;
 	FILE *f = fopen(path, "r");
 	FILE *out = NULL;
@@ -98,20 +101,24 @@ static int handle_file(const char *path,
 	strbuf_init(&two,  0);
 	while (fgets(buf, sizeof(buf), f)) {
 		if (!prefixcmp(buf, "<<<<<<< ")) {
-			if (hunk)
+			if (hunk != RR_CONTEXT)
 				goto bad;
-			hunk = 1;
+			hunk = RR_SIDE_1;
+		} else if (!prefixcmp(buf, "|||||||") && isspace(buf[7])) {
+			if (hunk != RR_SIDE_1)
+				goto bad;
+			hunk = RR_ORIGINAL;
 		} else if (!prefixcmp(buf, "=======") && isspace(buf[7])) {
-			if (hunk != 1)
+			if (hunk != RR_SIDE_1 && hunk != RR_ORIGINAL)
 				goto bad;
-			hunk = 2;
+			hunk = RR_SIDE_2;
 		} else if (!prefixcmp(buf, ">>>>>>> ")) {
-			if (hunk != 2)
+			if (hunk != RR_SIDE_2)
 				goto bad;
 			if (strbuf_cmp(&one, &two) > 0)
 				strbuf_swap(&one, &two);
 			hunk_no++;
-			hunk = 0;
+			hunk = RR_CONTEXT;
 			if (out) {
 				fputs("<<<<<<<\n", out);
 				fwrite(one.buf, one.len, 1, out);
@@ -127,9 +134,11 @@ static int handle_file(const char *path,
 			}
 			strbuf_reset(&one);
 			strbuf_reset(&two);
-		} else if (hunk == 1)
+		} else if (hunk == RR_SIDE_1)
 			strbuf_addstr(&one, buf);
-		else if (hunk == 2)
+		else if (hunk == RR_ORIGINAL)
+			; /* discard */
+		else if (hunk == RR_SIDE_2)
 			strbuf_addstr(&two, buf);
 		else if (out)
 			fputs(buf, out);
@@ -146,7 +155,7 @@ static int handle_file(const char *path,
 		fclose(out);
 	if (sha1)
 		SHA1_Final(sha1, &ctx);
-	if (hunk) {
+	if (hunk != RR_CONTEXT) {
 		if (output)
 			unlink(output);
 		return error("Could not parse conflict hunks in %s", path);