It is much easier to reason about, when the config code to set/unset
variables or to remove/rename sections does not rely on a global (or
file-local) variable.
Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---
config.c | 119 +++++++++++++++++++++++++++++++++++----------------------------
1 file changed, 66 insertions(+), 53 deletions(-)
diff --git a/config.c b/config.c
index 4cd745f6628..90ae71cb905 100644
--- a/config.c
+++ b/config.c
@@ -2297,7 +2297,7 @@ void git_die_config(const char *key, const char *err, ...)
* Find all the stuff for git_config_set() below.
*/
-static struct {
+struct config_set_store {
int baselen;
char *key;
int do_not_match;
@@ -2307,56 +2307,58 @@ static struct {
unsigned int offset_alloc;
enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
unsigned int seen;
-} store;
+};
-static int matches(const char *key, const char *value)
+static int matches(const char *key, const char *value,
+ const struct config_set_store *store)
{
- if (strcmp(key, store.key))
+ if (strcmp(key, store->key))
return 0; /* not ours */
- if (!store.value_regex)
+ if (!store->value_regex)
return 1; /* always matches */
- if (store.value_regex == CONFIG_REGEX_NONE)
+ if (store->value_regex == CONFIG_REGEX_NONE)
return 0; /* never matches */
- return store.do_not_match ^
- (value && !regexec(store.value_regex, value, 0, NULL, 0));
+ return store->do_not_match ^
+ (value && !regexec(store->value_regex, value, 0, NULL, 0));
}
static int store_aux(const char *key, const char *value, void *cb)
{
const char *ep;
size_t section_len;
+ struct config_set_store *store = cb;
- switch (store.state) {
+ switch (store->state) {
case KEY_SEEN:
- if (matches(key, value)) {
- if (store.seen == 1 && store.multi_replace == 0) {
+ if (matches(key, value, store)) {
+ if (store->seen == 1 && store->multi_replace == 0) {
warning(_("%s has multiple values"), key);
}
- ALLOC_GROW(store.offset, store.seen + 1,
- store.offset_alloc);
+ ALLOC_GROW(store->offset, store->seen + 1,
+ store->offset_alloc);
- store.offset[store.seen] = cf->do_ftell(cf);
- store.seen++;
+ store->offset[store->seen] = cf->do_ftell(cf);
+ store->seen++;
}
break;
case SECTION_SEEN:
/*
- * What we are looking for is in store.key (both
+ * What we are looking for is in store->key (both
* section and var), and its section part is baselen
* long. We found key (again, both section and var).
* We would want to know if this key is in the same
* section as what we are looking for. We already
* know we are in the same section as what should
- * hold store.key.
+ * hold store->key.
*/
ep = strrchr(key, '.');
section_len = ep - key;
- if ((section_len != store.baselen) ||
- memcmp(key, store.key, section_len+1)) {
- store.state = SECTION_END_SEEN;
+ if ((section_len != store->baselen) ||
+ memcmp(key, store->key, section_len+1)) {
+ store->state = SECTION_END_SEEN;
break;
}
@@ -2364,26 +2366,27 @@ static int store_aux(const char *key, const char *value, void *cb)
* Do not increment matches: this is no match, but we
* just made sure we are in the desired section.
*/
- ALLOC_GROW(store.offset, store.seen + 1,
- store.offset_alloc);
- store.offset[store.seen] = cf->do_ftell(cf);
+ ALLOC_GROW(store->offset, store->seen + 1,
+ store->offset_alloc);
+ store->offset[store->seen] = cf->do_ftell(cf);
/* fallthru */
case SECTION_END_SEEN:
case START:
- if (matches(key, value)) {
- ALLOC_GROW(store.offset, store.seen + 1,
- store.offset_alloc);
- store.offset[store.seen] = cf->do_ftell(cf);
- store.state = KEY_SEEN;
- store.seen++;
+ if (matches(key, value, store)) {
+ ALLOC_GROW(store->offset, store->seen + 1,
+ store->offset_alloc);
+ store->offset[store->seen] = cf->do_ftell(cf);
+ store->state = KEY_SEEN;
+ store->seen++;
} else {
- if (strrchr(key, '.') - key == store.baselen &&
- !strncmp(key, store.key, store.baselen)) {
- store.state = SECTION_SEEN;
- ALLOC_GROW(store.offset,
- store.seen + 1,
- store.offset_alloc);
- store.offset[store.seen] = cf->do_ftell(cf);
+ if (strrchr(key, '.') - key == store->baselen &&
+ !strncmp(key, store->key, store->baselen)) {
+ store->state = SECTION_SEEN;
+ ALLOC_GROW(store->offset,
+ store->seen + 1,
+ store->offset_alloc);
+ store->offset[store->seen] =
+ cf->do_ftell(cf);
}
}
}
@@ -2398,31 +2401,33 @@ static int write_error(const char *filename)
return 4;
}
-static struct strbuf store_create_section(const char *key)
+static struct strbuf store_create_section(const char *key,
+ const struct config_set_store *store)
{
const char *dot;
int i;
struct strbuf sb = STRBUF_INIT;
- dot = memchr(key, '.', store.baselen);
+ dot = memchr(key, '.', store->baselen);
if (dot) {
strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
- for (i = dot - key + 1; i < store.baselen; i++) {
+ for (i = dot - key + 1; i < store->baselen; i++) {
if (key[i] == '"' || key[i] == '\\')
strbuf_addch(&sb, '\\');
strbuf_addch(&sb, key[i]);
}
strbuf_addstr(&sb, "\"]\n");
} else {
- strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
+ strbuf_addf(&sb, "[%.*s]\n", store->baselen, key);
}
return sb;
}
-static ssize_t write_section(int fd, const char *key)
+static ssize_t write_section(int fd, const char *key,
+ const struct config_set_store *store)
{
- struct strbuf sb = store_create_section(key);
+ struct strbuf sb = store_create_section(key, store);
ssize_t ret;
ret = write_in_full(fd, sb.buf, sb.len);
@@ -2431,11 +2436,12 @@ static ssize_t write_section(int fd, const char *key)
return ret;
}
-static ssize_t write_pair(int fd, const char *key, const char *value)
+static ssize_t write_pair(int fd, const char *key, const char *value,
+ const struct config_set_store *store)
{
int i;
ssize_t ret;
- int length = strlen(key + store.baselen + 1);
+ int length = strlen(key + store->baselen + 1);
const char *quote = "";
struct strbuf sb = STRBUF_INIT;
@@ -2455,7 +2461,7 @@ static ssize_t write_pair(int fd, const char *key, const char *value)
quote = "\"";
strbuf_addf(&sb, "\t%.*s = %s",
- length, key + store.baselen + 1, quote);
+ length, key + store->baselen + 1, quote);
for (i = 0; value[i]; i++)
switch (value[i]) {
@@ -2565,6 +2571,9 @@ int git_config_set_multivar_in_file_gently(const char *config_filename,
char *filename_buf = NULL;
char *contents = NULL;
size_t contents_sz;
+ struct config_set_store store;
+
+ memset(&store, 0, sizeof(store));
/* parse-key returns negative; flip the sign to feed exit(3) */
ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
@@ -2607,8 +2616,8 @@ int git_config_set_multivar_in_file_gently(const char *config_filename,
}
store.key = (char *)key;
- if (write_section(fd, key) < 0 ||
- write_pair(fd, key, value) < 0)
+ if (write_section(fd, key, &store) < 0 ||
+ write_pair(fd, key, value, &store) < 0)
goto write_err_out;
} else {
struct stat st;
@@ -2647,7 +2656,7 @@ int git_config_set_multivar_in_file_gently(const char *config_filename,
* As a side effect, we make sure to transform only a valid
* existing config file.
*/
- if (git_config_from_file(store_aux, config_filename, NULL)) {
+ if (git_config_from_file(store_aux, config_filename, &store)) {
error("invalid config file %s", config_filename);
free(store.key);
if (store.value_regex != NULL &&
@@ -2731,10 +2740,10 @@ int git_config_set_multivar_in_file_gently(const char *config_filename,
/* write the pair (value == NULL means unset) */
if (value != NULL) {
if (store.state == START) {
- if (write_section(fd, key) < 0)
+ if (write_section(fd, key, &store) < 0)
goto write_err_out;
}
- if (write_pair(fd, key, value) < 0)
+ if (write_pair(fd, key, value, &store) < 0)
goto write_err_out;
}
@@ -2858,7 +2867,8 @@ static int section_name_is_ok(const char *name)
/* if new_name == NULL, the section is removed instead */
static int git_config_copy_or_rename_section_in_file(const char *config_filename,
- const char *old_name, const char *new_name, int copy)
+ const char *old_name,
+ const char *new_name, int copy)
{
int ret = 0, remove = 0;
char *filename_buf = NULL;
@@ -2868,6 +2878,9 @@ static int git_config_copy_or_rename_section_in_file(const char *config_filename
FILE *config_file = NULL;
struct stat st;
struct strbuf copystr = STRBUF_INIT;
+ struct config_set_store store;
+
+ memset(&store, 0, sizeof(store));
if (new_name && !section_name_is_ok(new_name)) {
ret = error("invalid section name: %s", new_name);
@@ -2937,7 +2950,7 @@ static int git_config_copy_or_rename_section_in_file(const char *config_filename
}
store.baselen = strlen(new_name);
if (!copy) {
- if (write_section(out_fd, new_name) < 0) {
+ if (write_section(out_fd, new_name, &store) < 0) {
ret = write_error(get_lock_file_path(&lock));
goto out;
}
@@ -2958,7 +2971,7 @@ static int git_config_copy_or_rename_section_in_file(const char *config_filename
output[0] = '\t';
}
} else {
- copystr = store_create_section(new_name);
+ copystr = store_create_section(new_name, &store);
}
}
remove = 0;
--
2.16.2.windows.1.26.g2cc3565eb4b
