From: Stefan Beller <sbeller@google.com>
To: gitster@pobox.com, bmwill@google.com, pclouds@gmail.com
Cc: git@vger.kernel.org, Stefan Beller <sbeller@google.com>
Subject: [PATCH 32/35] pathspec: allow escaped query values
Date: Thu, 10 Nov 2016 12:34:25 -0800 [thread overview]
Message-ID: <20161110203428.30512-33-sbeller@google.com> (raw)
In-Reply-To: <20161110203428.30512-1-sbeller@google.com>
In our own .gitattributes file we have attributes such as:
*.[ch] whitespace=indent,trail,space
When querying for attributes we want to be able to ask for the exact
value, i.e.
git ls-files :(attr:whitespace=indent,trail,space)
should work, but the commas are used in the attr magic to introduce
the next attr, such that this query currently fails with
fatal: Invalid pathspec magic 'trail' in ':(attr:whitespace=indent,trail,space)'
This change allows escaping characters by a backslash, such that the query
git ls-files :(attr:whitespace=indent\,trail\,space)
will match all path that have the value "indent,trail,space" for the
whitespace attribute. To accomplish this, we need to modify two places.
First `eat_long_magic` needs to not stop early upon seeing a comma or
closing paren that is escaped. As a second step we need to remove any
escaping from the attr value.
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
pathspec.c | 53 +++++++++++++++++++++++++++++++++++++----
t/t6134-pathspec-with-labels.sh | 10 ++++++++
2 files changed, 58 insertions(+), 5 deletions(-)
diff --git a/pathspec.c b/pathspec.c
index 4aa7ea5..d702803 100644
--- a/pathspec.c
+++ b/pathspec.c
@@ -90,13 +90,57 @@ static void prefix_short_magic(struct strbuf *sb, int prefixlen,
strbuf_addf(sb, ",prefix:%d)", prefixlen);
}
+static size_t strcspn_escaped(const char *s, const char *stop)
+{
+ const char *i;
+
+ for (i = s; *i; i++) {
+ /* skip the escaped character */
+ if (i[0] == '\\' && i[1]) {
+ i++;
+ continue;
+ }
+
+ if (strchr(stop, *i))
+ break;
+ }
+ return i - s;
+}
+
+static inline int invalid_value_char(const char ch)
+{
+ if (isalnum(ch) || strchr(",-_", ch))
+ return 0;
+ return -1;
+}
+
+static char *attr_value_unescape(const char *value)
+{
+ const char *src;
+ char *dst, *ret;
+
+ ret = xmallocz(strlen(value));
+ for (src = value, dst = ret; *src; src++, dst++) {
+ if (*src == '\\') {
+ if (!src[1])
+ die(_("Escape character '\\' not allowed as "
+ "last character in attr value"));
+ src++;
+ }
+ if (invalid_value_char(*src))
+ die("cannot use '%c' for value matching", *src);
+ *dst = *src;
+ }
+ *dst = '\0';
+ return ret;
+}
+
static void parse_pathspec_attr_match(struct pathspec_item *item, const char *value)
{
struct string_list_item *si;
struct string_list list = STRING_LIST_INIT_DUP;
struct argv_array attrs = ARGV_ARRAY_INIT;
-
if (!value || !strlen(value))
die(_("attr spec must not be empty"));
@@ -128,10 +172,9 @@ static void parse_pathspec_attr_match(struct pathspec_item *item, const char *va
if (attr[attr_len] != '=')
am->match_mode = MATCH_SET;
else {
+ const char *v = &attr[attr_len + 1];
am->match_mode = MATCH_VALUE;
- am->value = xstrdup(&attr[attr_len + 1]);
- if (strchr(am->value, '\\'))
- die(_("attr spec values must not contain backslashes"));
+ am->value = attr_value_unescape(v);
}
break;
}
@@ -168,7 +211,7 @@ static void eat_long_magic(struct pathspec_item *item, const char *elt,
for (copyfrom = elt + 2;
*copyfrom && *copyfrom != ')';
copyfrom = nextat) {
- size_t len = strcspn(copyfrom, ",)");
+ size_t len = strcspn_escaped(copyfrom, ",)");
if (copyfrom[len] == ',')
nextat = copyfrom + len + 1;
else
diff --git a/t/t6134-pathspec-with-labels.sh b/t/t6134-pathspec-with-labels.sh
index e276811..5aafc0c 100755
--- a/t/t6134-pathspec-with-labels.sh
+++ b/t/t6134-pathspec-with-labels.sh
@@ -188,4 +188,14 @@ test_expect_success 'abort on asking for wrong magic' '
test_must_fail git ls-files . ":(attr:!label=foo)"
'
+test_expect_success 'check attribute list' '
+ cat <<-EOF >>.gitattributes &&
+ * whitespace=indent,trail,space
+ EOF
+ cat .gitattributes &&
+ git ls-files ":(attr:whitespace=indent\,trail\,space)" >actual &&
+ git ls-files >expect &&
+ test_cmp expect actual
+'
+
test_done
--
2.10.1.469.g00a8914
next prev parent reply other threads:[~2016-11-10 20:35 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-10 20:33 [PATCHv3 00/35] Revamp the attr subsystem! Stefan Beller
2016-11-10 20:33 ` [PATCH 01/35] commit.c: use strchrnul() to scan for one line Stefan Beller
2016-11-10 20:33 ` [PATCH 02/35] attr.c: " Stefan Beller
2016-11-10 20:33 ` [PATCH 03/35] attr.c: update a stale comment on "struct match_attr" Stefan Beller
2016-11-10 20:33 ` [PATCH 04/35] attr.c: explain the lack of attr-name syntax check in parse_attr() Stefan Beller
2016-11-10 20:33 ` [PATCH 05/35] attr.c: complete a sentence in a comment Stefan Beller
2016-11-10 20:33 ` [PATCH 06/35] attr.c: mark where #if DEBUG ends more clearly Stefan Beller
2016-11-10 20:34 ` [PATCH 07/35] attr.c: simplify macroexpand_one() Stefan Beller
2016-11-10 20:34 ` [PATCH 08/35] attr.c: tighten constness around "git_attr" structure Stefan Beller
2016-11-10 20:34 ` [PATCH 09/35] attr.c: plug small leak in parse_attr_line() Stefan Beller
2016-11-10 20:34 ` [PATCH 10/35] attr: rename function and struct related to checking attributes Stefan Beller
2016-11-10 20:34 ` [PATCH 11/35] attr: (re)introduce git_check_attr() and struct git_attr_check Stefan Beller
2016-11-10 20:34 ` [PATCH 12/35] attr: convert git_all_attrs() to use "struct git_attr_check" Stefan Beller
2016-11-10 20:34 ` [PATCH 13/35] attr: convert git_check_attrs() callers to use the new API Stefan Beller
2016-11-10 20:34 ` [PATCH 14/35] attr: retire git_check_attrs() API Stefan Beller
2016-11-10 20:34 ` [PATCH 15/35] attr: add counted string version of git_check_attr() Stefan Beller
2016-11-10 20:34 ` [PATCH 16/35] attr: expose validity check for attribute names Stefan Beller
2016-11-10 20:34 ` [PATCH 17/35] attr: support quoting pathname patterns in C style Stefan Beller
2016-11-10 20:34 ` [PATCH 18/35] attr.c: add push_stack() helper Stefan Beller
2016-11-10 20:34 ` [PATCH 19/35] attr.c: pass struct git_attr_check down the callchain Stefan Beller
2016-11-10 20:34 ` [PATCH 20/35] attr.c: rename a local variable check Stefan Beller
2016-11-10 20:34 ` [PATCH 21/35] attr.c: correct ugly hack for git_all_attrs() Stefan Beller
2016-11-10 20:34 ` [PATCH 22/35] attr.c: introduce empty_attr_check_elems() Stefan Beller
2016-11-10 20:34 ` [PATCH 23/35] attr.c: always pass check[] to collect_some_attrs() Stefan Beller
2016-11-10 20:34 ` [PATCH 24/35] attr.c: outline the future plans by heavily commenting Stefan Beller
2016-11-10 20:34 ` [PATCH 25/35] attr: make git_check_attr_counted static Stefan Beller
2016-11-10 20:34 ` [PATCH 26/35] attr: convert to new threadsafe API Stefan Beller
2016-11-10 20:34 ` [PATCH 27/35] attr: keep attr stack for each check Stefan Beller
2016-11-10 20:34 ` [PATCH 28/35] Documentation: fix a typo Stefan Beller
2016-11-10 20:34 ` [PATCH 29/35] pathspec: move long magic parsing out of prefix_pathspec Stefan Beller
2016-11-10 20:34 ` [PATCH 30/35] pathspec: move prefix check out of the inner loop Stefan Beller
2016-11-10 20:34 ` [PATCH 31/35] pathspec: allow querying for attributes Stefan Beller
2016-11-22 10:41 ` Duy Nguyen
2016-11-22 17:26 ` Stefan Beller
2016-11-23 9:38 ` Duy Nguyen
2016-11-28 18:02 ` Brandon Williams
2016-11-28 18:03 ` Brandon Williams
2016-11-28 22:11 ` Brandon Williams
2016-11-29 17:37 ` Stefan Beller
2016-11-10 20:34 ` Stefan Beller [this message]
2016-11-10 20:34 ` [PATCH 33/35] submodule update: add `--init-default-path` switch Stefan Beller
2016-11-10 20:34 ` [PATCH 34/35] clone: add --init-submodule=<pathspec> switch Stefan Beller
2016-11-10 20:34 ` [PATCH 35/35] completion: clone can initialize specific submodules Stefan Beller
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