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-rw-r--r--builtin/branch.c5
-rw-r--r--builtin/checkout.c2
-rw-r--r--builtin/merge.c2
-rw-r--r--cache.h32
-rw-r--r--refs.c2
-rw-r--r--revision.c2
-rw-r--r--sha1_name.c93
-rw-r--r--strbuf.h21
-rwxr-xr-xt/t0100-previous.sh8
-rwxr-xr-xt/t3204-branch-name-interpretation.sh133
10 files changed, 249 insertions, 51 deletions
diff --git a/builtin/branch.c b/builtin/branch.c
index 94f7de7..291fe90 100644
--- a/builtin/branch.c
+++ b/builtin/branch.c
@@ -191,17 +191,20 @@ static int delete_branches(int argc, const char **argv, int force, int kinds,
int ret = 0;
int remote_branch = 0;
struct strbuf bname = STRBUF_INIT;
+ unsigned allowed_interpret;
switch (kinds) {
case FILTER_REFS_REMOTES:
fmt = "refs/remotes/%s";
/* For subsequent UI messages */
remote_branch = 1;
+ allowed_interpret = INTERPRET_BRANCH_REMOTE;
force = 1;
break;
case FILTER_REFS_BRANCHES:
fmt = "refs/heads/%s";
+ allowed_interpret = INTERPRET_BRANCH_LOCAL;
break;
default:
die(_("cannot use -a with -d"));
@@ -216,7 +219,7 @@ static int delete_branches(int argc, const char **argv, int force, int kinds,
char *target = NULL;
int flags = 0;
- strbuf_branchname(&bname, argv[i]);
+ strbuf_branchname(&bname, argv[i], allowed_interpret);
free(name);
name = mkpathdup(fmt, bname.buf);
diff --git a/builtin/checkout.c b/builtin/checkout.c
index f174f50..81f07c3 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -452,7 +452,7 @@ static void setup_branch_path(struct branch_info *branch)
{
struct strbuf buf = STRBUF_INIT;
- strbuf_branchname(&buf, branch->name);
+ strbuf_branchname(&buf, branch->name, INTERPRET_BRANCH_LOCAL);
if (strcmp(buf.buf, branch->name))
branch->name = xstrdup(buf.buf);
strbuf_splice(&buf, 0, 0, "refs/heads/", 11);
diff --git a/builtin/merge.c b/builtin/merge.c
index a96d4fb..848a298 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -438,7 +438,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
char *found_ref;
int len, early;
- strbuf_branchname(&bname, remote);
+ strbuf_branchname(&bname, remote, 0);
remote = bname.buf;
memset(branch_head, 0, sizeof(branch_head));
diff --git a/cache.h b/cache.h
index 8c0e644..c958269 100644
--- a/cache.h
+++ b/cache.h
@@ -1360,7 +1360,37 @@ extern char *oid_to_hex_r(char *out, const struct object_id *oid);
extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
extern char *oid_to_hex(const struct object_id *oid); /* same static buffer as sha1_to_hex */
-extern int interpret_branch_name(const char *str, int len, struct strbuf *);
+/*
+ * This reads short-hand syntax that not only evaluates to a commit
+ * object name, but also can act as if the end user spelled the name
+ * of the branch from the command line.
+ *
+ * - "@{-N}" finds the name of the Nth previous branch we were on, and
+ * places the name of the branch in the given buf and returns the
+ * number of characters parsed if successful.
+ *
+ * - "<branch>@{upstream}" finds the name of the other ref that
+ * <branch> is configured to merge with (missing <branch> defaults
+ * to the current branch), and places the name of the branch in the
+ * given buf and returns the number of characters parsed if
+ * successful.
+ *
+ * If the input is not of the accepted format, it returns a negative
+ * number to signal an error.
+ *
+ * If the input was ok but there are not N branch switches in the
+ * reflog, it returns 0.
+ *
+ * If "allowed" is non-zero, it is a treated as a bitfield of allowable
+ * expansions: local branches ("refs/heads/"), remote branches
+ * ("refs/remotes/"), or "HEAD". If no "allowed" bits are set, any expansion is
+ * allowed, even ones to refs outside of those namespaces.
+ */
+#define INTERPRET_BRANCH_LOCAL (1<<0)
+#define INTERPRET_BRANCH_REMOTE (1<<1)
+#define INTERPRET_BRANCH_HEAD (1<<2)
+extern int interpret_branch_name(const char *str, int len, struct strbuf *,
+ unsigned allowed);
extern int get_oid_mb(const char *str, struct object_id *oid);
extern int validate_headref(const char *ref);
diff --git a/refs.c b/refs.c
index 4d6bf92..b0d5894 100644
--- a/refs.c
+++ b/refs.c
@@ -405,7 +405,7 @@ int refname_match(const char *abbrev_name, const char *full_name)
static char *substitute_branch_name(const char **string, int *len)
{
struct strbuf buf = STRBUF_INIT;
- int ret = interpret_branch_name(*string, *len, &buf);
+ int ret = interpret_branch_name(*string, *len, &buf, 0);
if (ret == *len) {
size_t size;
diff --git a/revision.c b/revision.c
index b37dbec..771d079 100644
--- a/revision.c
+++ b/revision.c
@@ -147,7 +147,7 @@ static void add_pending_object_with_path(struct rev_info *revs,
revs->no_walk = 0;
if (revs->reflog_info && obj->type == OBJ_COMMIT) {
struct strbuf buf = STRBUF_INIT;
- int len = interpret_branch_name(name, 0, &buf);
+ int len = interpret_branch_name(name, 0, &buf, 0);
int st;
if (0 < len && name[len] && buf.len)
diff --git a/sha1_name.c b/sha1_name.c
index 73a915f..26ceec1 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -1176,7 +1176,8 @@ static int interpret_empty_at(const char *name, int namelen, int len, struct str
return 1;
}
-static int reinterpret(const char *name, int namelen, int len, struct strbuf *buf)
+static int reinterpret(const char *name, int namelen, int len,
+ struct strbuf *buf, unsigned allowed)
{
/* we have extra data, which might need further processing */
struct strbuf tmp = STRBUF_INIT;
@@ -1184,7 +1185,7 @@ static int reinterpret(const char *name, int namelen, int len, struct strbuf *bu
int ret;
strbuf_add(buf, name + len, namelen - len);
- ret = interpret_branch_name(buf->buf, buf->len, &tmp);
+ ret = interpret_branch_name(buf->buf, buf->len, &tmp, allowed);
/* that data was not interpreted, remove our cruft */
if (ret < 0) {
strbuf_setlen(buf, used);
@@ -1205,11 +1206,27 @@ static void set_shortened_ref(struct strbuf *buf, const char *ref)
free(s);
}
+static int branch_interpret_allowed(const char *refname, unsigned allowed)
+{
+ if (!allowed)
+ return 1;
+
+ if ((allowed & INTERPRET_BRANCH_LOCAL) &&
+ starts_with(refname, "refs/heads/"))
+ return 1;
+ if ((allowed & INTERPRET_BRANCH_REMOTE) &&
+ starts_with(refname, "refs/remotes/"))
+ return 1;
+
+ return 0;
+}
+
static int interpret_branch_mark(const char *name, int namelen,
int at, struct strbuf *buf,
int (*get_mark)(const char *, int),
const char *(*get_data)(struct branch *,
- struct strbuf *))
+ struct strbuf *),
+ unsigned allowed)
{
int len;
struct branch *branch;
@@ -1234,64 +1251,55 @@ static int interpret_branch_mark(const char *name, int namelen,
if (!value)
die("%s", err.buf);
+ if (!branch_interpret_allowed(value, allowed))
+ return -1;
+
set_shortened_ref(buf, value);
return len + at;
}
-/*
- * This reads short-hand syntax that not only evaluates to a commit
- * object name, but also can act as if the end user spelled the name
- * of the branch from the command line.
- *
- * - "@{-N}" finds the name of the Nth previous branch we were on, and
- * places the name of the branch in the given buf and returns the
- * number of characters parsed if successful.
- *
- * - "<branch>@{upstream}" finds the name of the other ref that
- * <branch> is configured to merge with (missing <branch> defaults
- * to the current branch), and places the name of the branch in the
- * given buf and returns the number of characters parsed if
- * successful.
- *
- * If the input is not of the accepted format, it returns a negative
- * number to signal an error.
- *
- * If the input was ok but there are not N branch switches in the
- * reflog, it returns 0.
- */
-int interpret_branch_name(const char *name, int namelen, struct strbuf *buf)
+int interpret_branch_name(const char *name, int namelen, struct strbuf *buf,
+ unsigned allowed)
{
char *at;
const char *start;
- int len = interpret_nth_prior_checkout(name, namelen, buf);
+ int len;
if (!namelen)
namelen = strlen(name);
- if (!len) {
- return len; /* syntax Ok, not enough switches */
- } else if (len > 0) {
- if (len == namelen)
- return len; /* consumed all */
- else
- return reinterpret(name, namelen, len, buf);
+ if (!allowed || (allowed & INTERPRET_BRANCH_LOCAL)) {
+ len = interpret_nth_prior_checkout(name, namelen, buf);
+ if (!len) {
+ return len; /* syntax Ok, not enough switches */
+ } else if (len > 0) {
+ if (len == namelen)
+ return len; /* consumed all */
+ else
+ return reinterpret(name, namelen, len, buf, allowed);
+ }
}
for (start = name;
(at = memchr(start, '@', namelen - (start - name)));
start = at + 1) {
- len = interpret_empty_at(name, namelen, at - name, buf);
- if (len > 0)
- return reinterpret(name, namelen, len, buf);
+ if (!allowed || (allowed & INTERPRET_BRANCH_HEAD)) {
+ len = interpret_empty_at(name, namelen, at - name, buf);
+ if (len > 0)
+ return reinterpret(name, namelen, len, buf,
+ allowed);
+ }
len = interpret_branch_mark(name, namelen, at - name, buf,
- upstream_mark, branch_get_upstream);
+ upstream_mark, branch_get_upstream,
+ allowed);
if (len > 0)
return len;
len = interpret_branch_mark(name, namelen, at - name, buf,
- push_mark, branch_get_push);
+ push_mark, branch_get_push,
+ allowed);
if (len > 0)
return len;
}
@@ -1299,22 +1307,19 @@ int interpret_branch_name(const char *name, int namelen, struct strbuf *buf)
return -1;
}
-int strbuf_branchname(struct strbuf *sb, const char *name)
+void strbuf_branchname(struct strbuf *sb, const char *name, unsigned allowed)
{
int len = strlen(name);
- int used = interpret_branch_name(name, len, sb);
+ int used = interpret_branch_name(name, len, sb, allowed);
- if (used == len)
- return 0;
if (used < 0)
used = 0;
strbuf_add(sb, name + used, len - used);
- return len;
}
int strbuf_check_branch_ref(struct strbuf *sb, const char *name)
{
- strbuf_branchname(sb, name);
+ strbuf_branchname(sb, name, INTERPRET_BRANCH_LOCAL);
if (name[0] == '-')
return -1;
strbuf_splice(sb, 0, 0, "refs/heads/", 11);
diff --git a/strbuf.h b/strbuf.h
index cf8e4bf..80047b1 100644
--- a/strbuf.h
+++ b/strbuf.h
@@ -574,7 +574,26 @@ static inline void strbuf_complete_line(struct strbuf *sb)
strbuf_complete(sb, '\n');
}
-extern int strbuf_branchname(struct strbuf *sb, const char *name);
+/*
+ * Copy "name" to "sb", expanding any special @-marks as handled by
+ * interpret_branch_name(). The result is a non-qualified branch name
+ * (so "foo" or "origin/master" instead of "refs/heads/foo" or
+ * "refs/remotes/origin/master").
+ *
+ * Note that the resulting name may not be a syntactically valid refname.
+ *
+ * If "allowed" is non-zero, restrict the set of allowed expansions. See
+ * interpret_branch_name() for details.
+ */
+extern void strbuf_branchname(struct strbuf *sb, const char *name,
+ unsigned allowed);
+
+/*
+ * Like strbuf_branchname() above, but confirm that the result is
+ * syntactically valid to be used as a local branch name in refs/heads/.
+ *
+ * The return value is "0" if the result is valid, and "-1" otherwise.
+ */
extern int strbuf_check_branch_ref(struct strbuf *sb, const char *name);
extern void strbuf_addstr_urlencode(struct strbuf *, const char *,
diff --git a/t/t0100-previous.sh b/t/t0100-previous.sh
index e0a6940..58c0b7e 100755
--- a/t/t0100-previous.sh
+++ b/t/t0100-previous.sh
@@ -56,5 +56,13 @@ test_expect_success 'merge @{-100} before checking out that many branches yet' '
test_must_fail git merge @{-100}
'
+test_expect_success 'log -g @{-1}' '
+ git checkout -b last_branch &&
+ git checkout -b new_branch &&
+ echo "last_branch@{0}" >expect &&
+ git log -g --format=%gd @{-1} >actual &&
+ test_cmp expect actual
+'
+
test_done
diff --git a/t/t3204-branch-name-interpretation.sh b/t/t3204-branch-name-interpretation.sh
new file mode 100755
index 0000000..698d9cc
--- /dev/null
+++ b/t/t3204-branch-name-interpretation.sh
@@ -0,0 +1,133 @@
+#!/bin/sh
+
+test_description='interpreting exotic branch name arguments
+
+Branch name arguments are usually names which are taken to be inside of
+refs/heads/, but we interpret some magic syntax like @{-1}, @{upstream}, etc.
+This script aims to check the behavior of those corner cases.
+'
+. ./test-lib.sh
+
+expect_branch() {
+ git log -1 --format=%s "$1" >actual &&
+ echo "$2" >expect &&
+ test_cmp expect actual
+}
+
+expect_deleted() {
+ test_must_fail git rev-parse --verify "$1"
+}
+
+test_expect_success 'set up repo' '
+ test_commit one &&
+ test_commit two &&
+ git remote add origin foo.git
+'
+
+test_expect_success 'update branch via @{-1}' '
+ git branch previous one &&
+
+ git checkout previous &&
+ git checkout master &&
+
+ git branch -f @{-1} two &&
+ expect_branch previous two
+'
+
+test_expect_success 'update branch via local @{upstream}' '
+ git branch local one &&
+ git branch --set-upstream-to=local &&
+
+ git branch -f @{upstream} two &&
+ expect_branch local two
+'
+
+test_expect_success 'disallow updating branch via remote @{upstream}' '
+ git update-ref refs/remotes/origin/remote one &&
+ git branch --set-upstream-to=origin/remote &&
+
+ test_must_fail git branch -f @{upstream} two
+'
+
+test_expect_success 'create branch with pseudo-qualified name' '
+ git branch refs/heads/qualified two &&
+ expect_branch refs/heads/refs/heads/qualified two
+'
+
+test_expect_success 'delete branch via @{-1}' '
+ git branch previous-del &&
+
+ git checkout previous-del &&
+ git checkout master &&
+
+ git branch -D @{-1} &&
+ expect_deleted previous-del
+'
+
+test_expect_success 'delete branch via local @{upstream}' '
+ git branch local-del &&
+ git branch --set-upstream-to=local-del &&
+
+ git branch -D @{upstream} &&
+ expect_deleted local-del
+'
+
+test_expect_success 'delete branch via remote @{upstream}' '
+ git update-ref refs/remotes/origin/remote-del two &&
+ git branch --set-upstream-to=origin/remote-del &&
+
+ git branch -r -D @{upstream} &&
+ expect_deleted origin/remote-del
+'
+
+# Note that we create two oddly named local branches here. We want to make
+# sure that we do not accidentally delete either of them, even if
+# shorten_unambiguous_ref() tweaks the name to avoid ambiguity.
+test_expect_success 'delete @{upstream} expansion matches -r option' '
+ git update-ref refs/remotes/origin/remote-del two &&
+ git branch --set-upstream-to=origin/remote-del &&
+ git update-ref refs/heads/origin/remote-del two &&
+ git update-ref refs/heads/remotes/origin/remote-del two &&
+
+ test_must_fail git branch -D @{upstream} &&
+ expect_branch refs/heads/origin/remote-del two &&
+ expect_branch refs/heads/remotes/origin/remote-del two
+'
+
+test_expect_success 'disallow deleting remote branch via @{-1}' '
+ git update-ref refs/remotes/origin/previous one &&
+
+ git checkout -b origin/previous two &&
+ git checkout master &&
+
+ test_must_fail git branch -r -D @{-1} &&
+ expect_branch refs/remotes/origin/previous one &&
+ expect_branch refs/heads/origin/previous two
+'
+
+# The thing we are testing here is that "@" is the real branch refs/heads/@,
+# and not refs/heads/HEAD. These tests should not imply that refs/heads/@ is a
+# sane thing, but it _is_ technically allowed for now. If we disallow it, these
+# can be switched to test_must_fail.
+test_expect_success 'create branch named "@"' '
+ git branch -f @ one &&
+ expect_branch refs/heads/@ one
+'
+
+test_expect_success 'delete branch named "@"' '
+ git update-ref refs/heads/@ two &&
+ git branch -D @ &&
+ expect_deleted refs/heads/@
+'
+
+test_expect_success 'checkout does not treat remote @{upstream} as a branch' '
+ git update-ref refs/remotes/origin/checkout one &&
+ git branch --set-upstream-to=origin/checkout &&
+ git update-ref refs/heads/origin/checkout two &&
+ git update-ref refs/heads/remotes/origin/checkout two &&
+
+ git checkout @{upstream} &&
+ expect_branch HEAD one
+'
+
+test_done