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authorJunio C Hamano <gitster@pobox.com>2017-08-27 05:55:05 (GMT)
committerJunio C Hamano <gitster@pobox.com>2017-08-27 05:55:05 (GMT)
commita17483fcfe313e9ff5b9b0eb8245605fe7f66ea7 (patch)
treeb90b9eaa13cdcf37d65b8dde1fd715603ece0118
parentf6a47f9b7aa5ad472495c475d61f8a4b97f7b6b6 (diff)
parentc24f3abaceabb590125751a67ec0e32946780ac7 (diff)
downloadgit-a17483fcfe313e9ff5b9b0eb8245605fe7f66ea7.zip
git-a17483fcfe313e9ff5b9b0eb8245605fe7f66ea7.tar.gz
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Merge branch 'tb/apply-with-crlf'
"git apply" that is used as a better "patch -p1" failed to apply a taken from a file with CRLF line endings to a file with CRLF line endings. The root cause was because it misused convert_to_git() that tried to do "safe-crlf" processing by looking at the index entry at the same path, which is a nonsense---in that mode, "apply" is not working on the data in (or derived from) the index at all. This has been fixed. * tb/apply-with-crlf: apply: file commited with CRLF should roundtrip diff and apply convert: add SAFE_CRLF_KEEP_CRLF
-rw-r--r--apply.c41
-rw-r--r--convert.c10
-rw-r--r--convert.h3
-rwxr-xr-xt/t4124-apply-ws-rule.sh33
4 files changed, 71 insertions, 16 deletions
diff --git a/apply.c b/apply.c
index 956f56a..8666621 100644
--- a/apply.c
+++ b/apply.c
@@ -219,6 +219,7 @@ struct patch {
unsigned int recount:1;
unsigned int conflicted_threeway:1;
unsigned int direct_to_threeway:1;
+ unsigned int crlf_in_old:1;
struct fragment *fragments;
char *result;
size_t resultsize;
@@ -1662,6 +1663,19 @@ static void check_whitespace(struct apply_state *state,
}
/*
+ * Check if the patch has context lines with CRLF or
+ * the patch wants to remove lines with CRLF.
+ */
+static void check_old_for_crlf(struct patch *patch, const char *line, int len)
+{
+ if (len >= 2 && line[len-1] == '\n' && line[len-2] == '\r') {
+ patch->ws_rule |= WS_CR_AT_EOL;
+ patch->crlf_in_old = 1;
+ }
+}
+
+
+/*
* Parse a unified diff. Note that this really needs to parse each
* fragment separately, since the only way to know the difference
* between a "---" that is part of a patch, and a "---" that starts
@@ -1711,11 +1725,14 @@ static int parse_fragment(struct apply_state *state,
if (!deleted && !added)
leading++;
trailing++;
+ check_old_for_crlf(patch, line, len);
if (!state->apply_in_reverse &&
state->ws_error_action == correct_ws_error)
check_whitespace(state, line, len, patch->ws_rule);
break;
case '-':
+ if (!state->apply_in_reverse)
+ check_old_for_crlf(patch, line, len);
if (state->apply_in_reverse &&
state->ws_error_action != nowarn_ws_error)
check_whitespace(state, line, len, patch->ws_rule);
@@ -1724,6 +1741,8 @@ static int parse_fragment(struct apply_state *state,
trailing = 0;
break;
case '+':
+ if (state->apply_in_reverse)
+ check_old_for_crlf(patch, line, len);
if (!state->apply_in_reverse &&
state->ws_error_action != nowarn_ws_error)
check_whitespace(state, line, len, patch->ws_rule);
@@ -2266,8 +2285,11 @@ static void show_stats(struct apply_state *state, struct patch *patch)
add, pluses, del, minuses);
}
-static int read_old_data(struct stat *st, const char *path, struct strbuf *buf)
+static int read_old_data(struct stat *st, struct patch *patch,
+ const char *path, struct strbuf *buf)
{
+ enum safe_crlf safe_crlf = patch->crlf_in_old ?
+ SAFE_CRLF_KEEP_CRLF : SAFE_CRLF_RENORMALIZE;
switch (st->st_mode & S_IFMT) {
case S_IFLNK:
if (strbuf_readlink(buf, path, st->st_size) < 0)
@@ -2276,7 +2298,15 @@ static int read_old_data(struct stat *st, const char *path, struct strbuf *buf)
case S_IFREG:
if (strbuf_read_file(buf, path, st->st_size) != st->st_size)
return error(_("unable to open or read %s"), path);
- convert_to_git(&the_index, path, buf->buf, buf->len, buf, 0);
+ /*
+ * "git apply" without "--index/--cached" should never look
+ * at the index; the target file may not have been added to
+ * the index yet, and we may not even be in any Git repository.
+ * Pass NULL to convert_to_git() to stress this; the function
+ * should never look at the index when explicit crlf option
+ * is given.
+ */
+ convert_to_git(NULL, path, buf->buf, buf->len, buf, safe_crlf);
return 0;
default:
return -1;
@@ -3379,6 +3409,7 @@ static int load_patch_target(struct apply_state *state,
struct strbuf *buf,
const struct cache_entry *ce,
struct stat *st,
+ struct patch *patch,
const char *name,
unsigned expected_mode)
{
@@ -3394,7 +3425,7 @@ static int load_patch_target(struct apply_state *state,
} else if (has_symlink_leading_path(name, strlen(name))) {
return error(_("reading from '%s' beyond a symbolic link"), name);
} else {
- if (read_old_data(st, name, buf))
+ if (read_old_data(st, patch, name, buf))
return error(_("failed to read %s"), name);
}
}
@@ -3427,7 +3458,7 @@ static int load_preimage(struct apply_state *state,
/* We have a patched copy in memory; use that. */
strbuf_add(&buf, previous->result, previous->resultsize);
} else {
- status = load_patch_target(state, &buf, ce, st,
+ status = load_patch_target(state, &buf, ce, st, patch,
patch->old_name, patch->old_mode);
if (status < 0)
return status;
@@ -3515,7 +3546,7 @@ static int load_current(struct apply_state *state,
if (verify_index_match(ce, &st))
return error(_("%s: does not match index"), name);
- status = load_patch_target(state, &buf, ce, &st, name, mode);
+ status = load_patch_target(state, &buf, ce, &st, patch, name, mode);
if (status < 0)
return status;
else if (status)
diff --git a/convert.c b/convert.c
index 1012462..c5f0b21 100644
--- a/convert.c
+++ b/convert.c
@@ -1132,10 +1132,12 @@ int convert_to_git(const struct index_state *istate,
src = dst->buf;
len = dst->len;
}
- ret |= crlf_to_git(istate, path, src, len, dst, ca.crlf_action, checksafe);
- if (ret && dst) {
- src = dst->buf;
- len = dst->len;
+ if (checksafe != SAFE_CRLF_KEEP_CRLF) {
+ ret |= crlf_to_git(istate, path, src, len, dst, ca.crlf_action, checksafe);
+ if (ret && dst) {
+ src = dst->buf;
+ len = dst->len;
+ }
}
return ret | ident_to_git(path, src, len, dst, ca.ident);
}
diff --git a/convert.h b/convert.h
index 6b06144..4f2da22 100644
--- a/convert.h
+++ b/convert.h
@@ -12,7 +12,8 @@ enum safe_crlf {
SAFE_CRLF_FALSE = 0,
SAFE_CRLF_FAIL = 1,
SAFE_CRLF_WARN = 2,
- SAFE_CRLF_RENORMALIZE = 3
+ SAFE_CRLF_RENORMALIZE = 3,
+ SAFE_CRLF_KEEP_CRLF = 4
};
extern enum safe_crlf safe_crlf;
diff --git a/t/t4124-apply-ws-rule.sh b/t/t4124-apply-ws-rule.sh
index d350065..4fc27c5 100755
--- a/t/t4124-apply-ws-rule.sh
+++ b/t/t4124-apply-ws-rule.sh
@@ -467,21 +467,42 @@ test_expect_success 'same, but with CR-LF line endings && cr-at-eol set' '
test_cmp one expect
'
-test_expect_success 'same, but with CR-LF line endings && cr-at-eol unset' '
+test_expect_success 'CR-LF line endings && add line && text=auto' '
git config --unset core.whitespace &&
printf "a\r\n" >one &&
+ cp one save-one &&
+ git add one &&
printf "b\r\n" >>one &&
- printf "c\r\n" >>one &&
+ cp one expect &&
+ git diff -- one >patch &&
+ mv save-one one &&
+ echo "one text=auto" >.gitattributes &&
+ git apply patch &&
+ test_cmp one expect
+'
+
+test_expect_success 'CR-LF line endings && change line && text=auto' '
+ printf "a\r\n" >one &&
cp one save-one &&
- printf " \r\n" >>one &&
git add one &&
+ printf "b\r\n" >one &&
cp one expect &&
- printf "d\r\n" >>one &&
git diff -- one >patch &&
mv save-one one &&
- echo d >>expect &&
+ echo "one text=auto" >.gitattributes &&
+ git apply patch &&
+ test_cmp one expect
+'
- git apply --ignore-space-change --whitespace=fix patch &&
+test_expect_success 'LF in repo, CRLF in worktree && change line && text=auto' '
+ printf "a\n" >one &&
+ git add one &&
+ printf "b\r\n" >one &&
+ git diff -- one >patch &&
+ printf "a\r\n" >one &&
+ echo "one text=auto" >.gitattributes &&
+ git -c core.eol=CRLF apply patch &&
+ printf "b\r\n" >expect &&
test_cmp one expect
'