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builtin/apply: move 'symlink_changes' global into 'struct apply_state'

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To libify the apply functionality the 'symlink_changes' variable should
not be static and global to the file. Let's move it into
'struct apply_state'.

Reviewed-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Christian Couder 2016-05-24 10:11:22 +02:00 committed by Junio C Hamano
parent 71dac5cef5
commit 2f63cea963
1 changed files with 28 additions and 22 deletions
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50
builtin/apply.c
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@ -34,6 +34,20 @@ enum ws_ignore {
ignore_ws_change
};
/*
* We need to keep track of how symlinks in the preimage are
* manipulated by the patches. A patch to add a/b/c where a/b
* is a symlink should not be allowed to affect the directory
* the symlink points at, but if the same patch removes a/b,
* it is perfectly fine, as the patch removes a/b to make room
* to create a directory a/b so that a/b/c can be created.
*
* See also "struct string_list symlink_changes" in "struct
* apply_state".
*/
#define SYMLINK_GOES_AWAY 01
#define SYMLINK_IN_RESULT 02
struct apply_state {
const char *prefix;
int prefix_length;
@ -75,6 +89,7 @@ struct apply_state {
/* Various "current state" */
int linenr; /* current line number */
struct string_list symlink_changes; /* we have to track symlinks */
/*
* For "diff-stat" like behaviour, we keep track of the biggest change
@ -3702,52 +3717,42 @@ static int check_to_create(struct apply_state *state,
return 0;
}
/*
* We need to keep track of how symlinks in the preimage are
* manipulated by the patches. A patch to add a/b/c where a/b
* is a symlink should not be allowed to affect the directory
* the symlink points at, but if the same patch removes a/b,
* it is perfectly fine, as the patch removes a/b to make room
* to create a directory a/b so that a/b/c can be created.
*/
static struct string_list symlink_changes;
#define SYMLINK_GOES_AWAY 01
#define SYMLINK_IN_RESULT 02
static uintptr_t register_symlink_changes(const char *path, uintptr_t what)
static uintptr_t register_symlink_changes(struct apply_state *state,
const char *path,
uintptr_t what)
{
struct string_list_item *ent;
ent = string_list_lookup(&symlink_changes, path);
ent = string_list_lookup(&state->symlink_changes, path);
if (!ent) {
ent = string_list_insert(&symlink_changes, path);
ent = string_list_insert(&state->symlink_changes, path);
ent->util = (void *)0;
}
ent->util = (void *)(what | ((uintptr_t)ent->util));
return (uintptr_t)ent->util;
}
static uintptr_t check_symlink_changes(const char *path)
static uintptr_t check_symlink_changes(struct apply_state *state, const char *path)
{
struct string_list_item *ent;
ent = string_list_lookup(&symlink_changes, path);
ent = string_list_lookup(&state->symlink_changes, path);
if (!ent)
return 0;
return (uintptr_t)ent->util;
}
static void prepare_symlink_changes(struct patch *patch)
static void prepare_symlink_changes(struct apply_state *state, struct patch *patch)
{
for ( ; patch; patch = patch->next) {
if ((patch->old_name && S_ISLNK(patch->old_mode)) &&
(patch->is_rename || patch->is_delete))
/* the symlink at patch->old_name is removed */
register_symlink_changes(patch->old_name, SYMLINK_GOES_AWAY);
register_symlink_changes(state, patch->old_name, SYMLINK_GOES_AWAY);
if (patch->new_name && S_ISLNK(patch->new_mode))
/* the symlink at patch->new_name is created or remains */
register_symlink_changes(patch->new_name, SYMLINK_IN_RESULT);
register_symlink_changes(state, patch->new_name, SYMLINK_IN_RESULT);
}
}
@ -3761,7 +3766,7 @@ static int path_is_beyond_symlink_1(struct apply_state *state, struct strbuf *na
if (!name->len)
break;
name->buf[name->len] = '\0';
change = check_symlink_changes(name->buf);
change = check_symlink_changes(state, name->buf);
if (change & SYMLINK_IN_RESULT)
return 1;
if (change & SYMLINK_GOES_AWAY)
@ -3930,7 +3935,7 @@ static int check_patch_list(struct apply_state *state, struct patch *patch)
{
int err = 0;
prepare_symlink_changes(patch);
prepare_symlink_changes(state, patch);
prepare_fn_table(state, patch);
while (patch) {
if (state->apply_verbosely)
@ -4668,6 +4673,7 @@ static void init_apply_state(struct apply_state *state, const char *prefix)
static void clear_apply_state(struct apply_state *state)
{
string_list_clear(&state->limit_by_name, 0);
string_list_clear(&state->symlink_changes, 0);
strbuf_release(&state->root);
/* &state->fn_table is cleared at the end of apply_patch() */