From: Derrick Stolee <dstolee@xxxxxxxxxxxxx>
In cone mode, the sparse-checkout commmand will write patterns that
allow faster pattern matching. This matching only works if the patterns
in the sparse-checkout file are those written by that command. Users
can edit the sparse-checkout file and create patterns that cause the
cone mode matching to fail.
The cone mode patterns may end in "/*" but otherwise an un-escaped
asterisk is invalid. Add checks to disable cone mode when seeing these
values.
A later change will properly handle escaped asterisks.
Signed-off-by: Derrick Stolee <dstolee@xxxxxxxxxxxxx>
---
dir.c | 29 +++++++++++++++++++++++++++++
t/t1091-sparse-checkout-builtin.sh | 27 +++++++++++++++++++++++++++
2 files changed, 56 insertions(+)
diff --git a/dir.c b/dir.c
index c2e585607e..7cb78c8b87 100644
--- a/dir.c
+++ b/dir.c
@@ -635,6 +635,7 @@ static void add_pattern_to_hashsets(struct pattern_list *pl, struct path_pattern
struct pattern_entry *translated;
char *truncated;
char *data = NULL;
+ const char *prev, *cur, *next;
if (!pl->use_cone_patterns)
return;
@@ -652,12 +653,40 @@ static void add_pattern_to_hashsets(struct pattern_list *pl, struct path_pattern
}
if (given->patternlen <= 2 ||
+ *given->pattern == '*' ||
strstr(given->pattern, "**")) {
/* Not a cone pattern. */
warning(_("unrecognized pattern: '%s'"), given->pattern);
goto clear_hashmaps;
}
+ prev = given->pattern;
+ cur = given->pattern + 1;
+ next = given->pattern + 2;
+
+ while (*cur) {
+ /* We care about *cur == '*' */
+ if (*cur != '*')
+ goto increment;
+
+ /* But only if *prev != '\\' */
+ if (*prev == '\\')
+ goto increment;
+
+ /* But a trailing '/' then '*' is fine */
+ if (*prev == '/' && *next == 0)
+ goto increment;
+
+ /* Not a cone pattern. */
+ warning(_("unrecognized pattern: '%s'"), given->pattern);
+ goto clear_hashmaps;
+
+ increment:
+ prev++;
+ cur++;
+ next++;
+ }
+
if (given->patternlen > 2 &&
!strcmp(given->pattern + given->patternlen - 2, "/*")) {
if (!(given->flags & PATTERN_FLAG_NEGATIVE)) {
diff --git a/t/t1091-sparse-checkout-builtin.sh b/t/t1091-sparse-checkout-builtin.sh
index 2e57534799..470900f6f4 100755
--- a/t/t1091-sparse-checkout-builtin.sh
+++ b/t/t1091-sparse-checkout-builtin.sh
@@ -348,4 +348,31 @@ test_expect_success 'pattern-checks: too short' '
check_read_tree_errors repo "a" "disabling cone pattern matching"
'
+test_expect_success 'pattern-checks: trailing "*"' '
+ cat >repo/.git/info/sparse-checkout <<-\EOF &&
+ /*
+ !/*/
+ /a*
+ EOF
+ check_read_tree_errors repo "a" "disabling cone pattern matching"
+'
+
+test_expect_success 'pattern-checks: starting "*"' '
+ cat >repo/.git/info/sparse-checkout <<-\EOF &&
+ /*
+ !/*/
+ *eep/
+ EOF
+ check_read_tree_errors repo "a deep" "disabling cone pattern matching"
+'
+
+test_expect_success 'pattern-checks: escaped "*"' '
+ cat >repo/.git/info/sparse-checkout <<-\EOF &&
+ /*
+ !/*/
+ /does\*not\*exist/
+ EOF
+ check_read_tree_errors repo "a" ""
+'
+
test_done
--
gitgitgadget
