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1182 lines (940 loc) · 29.9 KB
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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "config.h"
#include "git2/config.h"
#include "git2/sys/config.h"
#include "array.h"
#include "buffer.h"
#include "config_backend.h"
#include "config_entries.h"
#include "config_parse.h"
#include "filebuf.h"
#include "regexp.h"
#include "sysdir.h"
#include "wildmatch.h"
/* Max depth for [include] directives */
#define MAX_INCLUDE_DEPTH 10
typedef struct config_file {
git_futils_filestamp stamp;
git_oid checksum;
char *path;
git_array_t(struct config_file) includes;
} config_file;
typedef struct {
git_config_backend parent;
git_mutex values_mutex;
git_config_entries *entries;
const git_repository *repo;
git_config_level_t level;
git_array_t(git_config_parser) readers;
bool locked;
git_filebuf locked_buf;
git_buf locked_content;
config_file file;
} config_file_backend;
typedef struct {
const git_repository *repo;
config_file *file;
git_config_entries *entries;
git_config_level_t level;
unsigned int depth;
} config_file_parse_data;
static int config_file_read(git_config_entries *entries, const git_repository *repo, config_file *file, git_config_level_t level, int depth);
static int config_file_read_buffer(git_config_entries *entries, const git_repository *repo, config_file *file, git_config_level_t level, int depth, const char *buf, size_t buflen);
static int config_file_write(config_file_backend *cfg, const char *orig_key, const char *key, const git_regexp *preg, const char *value);
static char *escape_value(const char *ptr);
/**
* Take the current values map from the backend and increase its
* refcount. This is its own function to make sure we use the mutex to
* avoid the map pointer from changing under us.
*/
static int config_file_entries_take(git_config_entries **out, config_file_backend *b)
{
int error;
if ((error = git_mutex_lock(&b->values_mutex)) < 0) {
git_error_set(GIT_ERROR_OS, "failed to lock config backend");
return error;
}
git_config_entries_incref(b->entries);
*out = b->entries;
git_mutex_unlock(&b->values_mutex);
return 0;
}
static void config_file_clear(config_file *file)
{
config_file *include;
uint32_t i;
if (file == NULL)
return;
git_array_foreach(file->includes, i, include) {
config_file_clear(include);
}
git_array_clear(file->includes);
git__free(file->path);
}
static int config_file_open(git_config_backend *cfg, git_config_level_t level, const git_repository *repo)
{
config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent);
int res;
b->level = level;
b->repo = repo;
if ((res = git_config_entries_new(&b->entries)) < 0)
return res;
if (!git_path_exists(b->file.path))
return 0;
/*
* git silently ignores configuration files that are not
* readable. We emulate that behavior. This is particularly
* important for sandboxed applications on macOS where the
* git configuration files may not be readable.
*/
if (p_access(b->file.path, R_OK) < 0)
return GIT_ENOTFOUND;
if (res < 0 || (res = config_file_read(b->entries, repo, &b->file, level, 0)) < 0) {
git_config_entries_free(b->entries);
b->entries = NULL;
}
return res;
}
static int config_file_is_modified(int *modified, config_file *file)
{
config_file *include;
git_buf buf = GIT_BUF_INIT;
git_oid hash;
uint32_t i;
int error = 0;
*modified = 0;
if (!git_futils_filestamp_check(&file->stamp, file->path))
goto check_includes;
if ((error = git_futils_readbuffer(&buf, file->path)) < 0)
goto out;
if ((error = git_hash_buf(&hash, buf.ptr, buf.size)) < 0)
goto out;
if (!git_oid_equal(&hash, &file->checksum)) {
*modified = 1;
goto out;
}
check_includes:
git_array_foreach(file->includes, i, include) {
if ((error = config_file_is_modified(modified, include)) < 0 || *modified)
goto out;
}
out:
git_buf_dispose(&buf);
return error;
}
static void config_file_clear_includes(config_file_backend *cfg)
{
config_file *include;
uint32_t i;
git_array_foreach(cfg->file.includes, i, include)
config_file_clear(include);
git_array_clear(cfg->file.includes);
}
static int config_file_set_entries(git_config_backend *cfg, git_config_entries *entries)
{
config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent);
git_config_entries *old = NULL;
int error;
if (b->parent.readonly) {
git_error_set(GIT_ERROR_CONFIG, "this backend is read-only");
return -1;
}
if ((error = git_mutex_lock(&b->values_mutex)) < 0) {
git_error_set(GIT_ERROR_OS, "failed to lock config backend");
goto out;
}
old = b->entries;
b->entries = entries;
git_mutex_unlock(&b->values_mutex);
out:
git_config_entries_free(old);
return error;
}
static int config_file_refresh_from_buffer(git_config_backend *cfg, const char *buf, size_t buflen)
{
config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent);
git_config_entries *entries = NULL;
int error;
config_file_clear_includes(b);
if ((error = git_config_entries_new(&entries)) < 0 ||
(error = config_file_read_buffer(entries, b->repo, &b->file,
b->level, 0, buf, buflen)) < 0 ||
(error = config_file_set_entries(cfg, entries)) < 0)
goto out;
entries = NULL;
out:
git_config_entries_free(entries);
return error;
}
static int config_file_refresh(git_config_backend *cfg)
{
config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent);
git_config_entries *entries = NULL;
int error, modified;
if (cfg->readonly)
return 0;
if ((error = config_file_is_modified(&modified, &b->file)) < 0 && error != GIT_ENOTFOUND)
goto out;
if (!modified)
return 0;
config_file_clear_includes(b);
if ((error = git_config_entries_new(&entries)) < 0 ||
(error = config_file_read(entries, b->repo, &b->file, b->level, 0)) < 0 ||
(error = config_file_set_entries(cfg, entries)) < 0)
goto out;
entries = NULL;
out:
git_config_entries_free(entries);
return (error == GIT_ENOTFOUND) ? 0 : error;
}
static void config_file_free(git_config_backend *_backend)
{
config_file_backend *backend = GIT_CONTAINER_OF(_backend, config_file_backend, parent);
if (backend == NULL)
return;
config_file_clear(&backend->file);
git_config_entries_free(backend->entries);
git_mutex_free(&backend->values_mutex);
git__free(backend);
}
static int config_file_iterator(
git_config_iterator **iter,
struct git_config_backend *backend)
{
config_file_backend *b = GIT_CONTAINER_OF(backend, config_file_backend, parent);
git_config_entries *dupped = NULL, *entries = NULL;
int error;
if ((error = config_file_refresh(backend)) < 0 ||
(error = config_file_entries_take(&entries, b)) < 0 ||
(error = git_config_entries_dup(&dupped, entries)) < 0 ||
(error = git_config_entries_iterator_new(iter, dupped)) < 0)
goto out;
out:
/* Let iterator delete duplicated entries when it's done */
git_config_entries_free(entries);
git_config_entries_free(dupped);
return error;
}
static int config_file_snapshot(git_config_backend **out, git_config_backend *backend)
{
return git_config_backend_snapshot(out, backend);
}
static int config_file_set(git_config_backend *cfg, const char *name, const char *value)
{
config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent);
git_config_entries *entries;
git_config_entry *existing;
char *key, *esc_value = NULL;
int error;
if ((error = git_config__normalize_name(name, &key)) < 0)
return error;
if ((error = config_file_entries_take(&entries, b)) < 0)
return error;
/* Check whether we'd be modifying an included or multivar key */
if ((error = git_config_entries_get_unique(&existing, entries, key)) < 0) {
if (error != GIT_ENOTFOUND)
goto out;
error = 0;
} else if ((!existing->value && !value) ||
(existing->value && value && !strcmp(existing->value, value))) {
/* don't update if old and new values already match */
error = 0;
goto out;
}
/* No early returns due to sanity checks, let's write it out and refresh */
if (value) {
esc_value = escape_value(value);
GIT_ERROR_CHECK_ALLOC(esc_value);
}
if ((error = config_file_write(b, name, key, NULL, esc_value)) < 0)
goto out;
out:
git_config_entries_free(entries);
git__free(esc_value);
git__free(key);
return error;
}
/* release the map containing the entry as an equivalent to freeing it */
static void config_file_entry_free(git_config_entry *entry)
{
git_config_entries *entries = (git_config_entries *) entry->payload;
git_config_entries_free(entries);
}
/*
* Internal function that actually gets the value in string form
*/
static int config_file_get(git_config_backend *cfg, const char *key, git_config_entry **out)
{
config_file_backend *h = GIT_CONTAINER_OF(cfg, config_file_backend, parent);
git_config_entries *entries = NULL;
git_config_entry *entry;
int error = 0;
if (!h->parent.readonly && ((error = config_file_refresh(cfg)) < 0))
return error;
if ((error = config_file_entries_take(&entries, h)) < 0)
return error;
if ((error = (git_config_entries_get(&entry, entries, key))) < 0) {
git_config_entries_free(entries);
return error;
}
entry->free = config_file_entry_free;
entry->payload = entries;
*out = entry;
return 0;
}
static int config_file_set_multivar(
git_config_backend *cfg, const char *name, const char *regexp, const char *value)
{
config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent);
git_regexp preg;
int result;
char *key;
GIT_ASSERT_ARG(regexp);
if ((result = git_config__normalize_name(name, &key)) < 0)
return result;
if ((result = git_regexp_compile(&preg, regexp, 0)) < 0)
goto out;
/* If we do have it, set call config_file_write() and reload */
if ((result = config_file_write(b, name, key, &preg, value)) < 0)
goto out;
out:
git__free(key);
git_regexp_dispose(&preg);
return result;
}
static int config_file_delete(git_config_backend *cfg, const char *name)
{
config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent);
git_config_entries *entries = NULL;
git_config_entry *entry;
char *key = NULL;
int error;
if ((error = git_config__normalize_name(name, &key)) < 0)
goto out;
if ((error = config_file_entries_take(&entries, b)) < 0)
goto out;
/* Check whether we'd be modifying an included or multivar key */
if ((error = git_config_entries_get_unique(&entry, entries, key)) < 0) {
if (error == GIT_ENOTFOUND)
git_error_set(GIT_ERROR_CONFIG, "could not find key '%s' to delete", name);
goto out;
}
if ((error = config_file_write(b, name, entry->name, NULL, NULL)) < 0)
goto out;
out:
git_config_entries_free(entries);
git__free(key);
return error;
}
static int config_file_delete_multivar(git_config_backend *cfg, const char *name, const char *regexp)
{
config_file_backend *b = GIT_CONTAINER_OF(cfg, config_file_backend, parent);
git_config_entries *entries = NULL;
git_config_entry *entry = NULL;
git_regexp preg = GIT_REGEX_INIT;
char *key = NULL;
int result;
if ((result = git_config__normalize_name(name, &key)) < 0)
goto out;
if ((result = config_file_entries_take(&entries, b)) < 0)
goto out;
if ((result = git_config_entries_get(&entry, entries, key)) < 0) {
if (result == GIT_ENOTFOUND)
git_error_set(GIT_ERROR_CONFIG, "could not find key '%s' to delete", name);
goto out;
}
if ((result = git_regexp_compile(&preg, regexp, 0)) < 0)
goto out;
if ((result = config_file_write(b, name, key, &preg, NULL)) < 0)
goto out;
out:
git_config_entries_free(entries);
git__free(key);
git_regexp_dispose(&preg);
return result;
}
static int config_file_lock(git_config_backend *_cfg)
{
config_file_backend *cfg = GIT_CONTAINER_OF(_cfg, config_file_backend, parent);
int error;
if ((error = git_filebuf_open(&cfg->locked_buf, cfg->file.path, 0, GIT_CONFIG_FILE_MODE)) < 0)
return error;
error = git_futils_readbuffer(&cfg->locked_content, cfg->file.path);
if (error < 0 && error != GIT_ENOTFOUND) {
git_filebuf_cleanup(&cfg->locked_buf);
return error;
}
cfg->locked = true;
return 0;
}
static int config_file_unlock(git_config_backend *_cfg, int success)
{
config_file_backend *cfg = GIT_CONTAINER_OF(_cfg, config_file_backend, parent);
int error = 0;
if (success) {
git_filebuf_write(&cfg->locked_buf, cfg->locked_content.ptr, cfg->locked_content.size);
error = git_filebuf_commit(&cfg->locked_buf);
}
git_filebuf_cleanup(&cfg->locked_buf);
git_buf_dispose(&cfg->locked_content);
cfg->locked = false;
return error;
}
int git_config_backend_from_file(git_config_backend **out, const char *path)
{
config_file_backend *backend;
backend = git__calloc(1, sizeof(config_file_backend));
GIT_ERROR_CHECK_ALLOC(backend);
backend->parent.version = GIT_CONFIG_BACKEND_VERSION;
git_mutex_init(&backend->values_mutex);
backend->file.path = git__strdup(path);
GIT_ERROR_CHECK_ALLOC(backend->file.path);
git_array_init(backend->file.includes);
backend->parent.open = config_file_open;
backend->parent.get = config_file_get;
backend->parent.set = config_file_set;
backend->parent.set_multivar = config_file_set_multivar;
backend->parent.del = config_file_delete;
backend->parent.del_multivar = config_file_delete_multivar;
backend->parent.iterator = config_file_iterator;
backend->parent.snapshot = config_file_snapshot;
backend->parent.lock = config_file_lock;
backend->parent.unlock = config_file_unlock;
backend->parent.free = config_file_free;
*out = (git_config_backend *)backend;
return 0;
}
static int included_path(git_buf *out, const char *dir, const char *path)
{
/* From the user's home */
if (path[0] == '~' && path[1] == '/')
return git_sysdir_expand_global_file(out, &path[1]);
return git_path_join_unrooted(out, path, dir, NULL);
}
/* Escape the values to write them to the file */
static char *escape_value(const char *ptr)
{
git_buf buf;
size_t len;
const char *esc;
GIT_ASSERT_ARG_WITH_RETVAL(ptr, NULL);
len = strlen(ptr);
if (!len)
return git__calloc(1, sizeof(char));
if (git_buf_init(&buf, len) < 0)
return NULL;
while (*ptr != '\0') {
if ((esc = strchr(git_config_escaped, *ptr)) != NULL) {
git_buf_putc(&buf, '\\');
git_buf_putc(&buf, git_config_escapes[esc - git_config_escaped]);
} else {
git_buf_putc(&buf, *ptr);
}
ptr++;
}
if (git_buf_oom(&buf))
return NULL;
return git_buf_detach(&buf);
}
static int parse_include(config_file_parse_data *parse_data, const char *file)
{
config_file *include;
git_buf path = GIT_BUF_INIT;
char *dir;
int result;
if (!file)
return 0;
if ((result = git_path_dirname_r(&path, parse_data->file->path)) < 0)
return result;
dir = git_buf_detach(&path);
result = included_path(&path, dir, file);
git__free(dir);
if (result < 0)
return result;
include = git_array_alloc(parse_data->file->includes);
GIT_ERROR_CHECK_ALLOC(include);
memset(include, 0, sizeof(*include));
git_array_init(include->includes);
include->path = git_buf_detach(&path);
result = config_file_read(parse_data->entries, parse_data->repo, include,
parse_data->level, parse_data->depth+1);
if (result == GIT_ENOTFOUND) {
git_error_clear();
result = 0;
}
return result;
}
static int do_match_gitdir(
int *matches,
const git_repository *repo,
const char *cfg_file,
const char *condition,
bool case_insensitive)
{
git_buf pattern = GIT_BUF_INIT, gitdir = GIT_BUF_INIT;
int error;
if (condition[0] == '.' && git_path_is_dirsep(condition[1])) {
git_path_dirname_r(&pattern, cfg_file);
git_buf_joinpath(&pattern, pattern.ptr, condition + 2);
} else if (condition[0] == '~' && git_path_is_dirsep(condition[1]))
git_sysdir_expand_global_file(&pattern, condition + 1);
else if (!git_path_is_absolute(condition))
git_buf_joinpath(&pattern, "**", condition);
else
git_buf_sets(&pattern, condition);
if (git_path_is_dirsep(condition[strlen(condition) - 1]))
git_buf_puts(&pattern, "**");
if (git_buf_oom(&pattern)) {
error = -1;
goto out;
}
if ((error = git_repository_item_path(&gitdir, repo, GIT_REPOSITORY_ITEM_GITDIR)) < 0)
goto out;
if (git_path_is_dirsep(gitdir.ptr[gitdir.size - 1]))
git_buf_truncate(&gitdir, gitdir.size - 1);
*matches = wildmatch(pattern.ptr, gitdir.ptr,
WM_PATHNAME | (case_insensitive ? WM_CASEFOLD : 0)) == WM_MATCH;
out:
git_buf_dispose(&pattern);
git_buf_dispose(&gitdir);
return error;
}
static int conditional_match_gitdir(
int *matches,
const git_repository *repo,
const char *cfg_file,
const char *value)
{
return do_match_gitdir(matches, repo, cfg_file, value, false);
}
static int conditional_match_gitdir_i(
int *matches,
const git_repository *repo,
const char *cfg_file,
const char *value)
{
return do_match_gitdir(matches, repo, cfg_file, value, true);
}
static int conditional_match_onbranch(
int *matches,
const git_repository *repo,
const char *cfg_file,
const char *condition)
{
git_buf reference = GIT_BUF_INIT, buf = GIT_BUF_INIT;
int error;
GIT_UNUSED(cfg_file);
/*
* NOTE: you cannot use `git_repository_head` here. Looking up the
* HEAD reference will create the ODB, which causes us to read the
* repo's config for keys like core.precomposeUnicode. As we're
* just parsing the config right now, though, this would result in
* an endless recursion.
*/
if ((error = git_buf_joinpath(&buf, git_repository_path(repo), GIT_HEAD_FILE)) < 0 ||
(error = git_futils_readbuffer(&reference, buf.ptr)) < 0)
goto out;
git_buf_rtrim(&reference);
if (git__strncmp(reference.ptr, GIT_SYMREF, strlen(GIT_SYMREF)))
goto out;
git_buf_consume(&reference, reference.ptr + strlen(GIT_SYMREF));
if (git__strncmp(reference.ptr, GIT_REFS_HEADS_DIR, strlen(GIT_REFS_HEADS_DIR)))
goto out;
git_buf_consume(&reference, reference.ptr + strlen(GIT_REFS_HEADS_DIR));
/*
* If the condition ends with a '/', then we should treat it as if
* it had '**' appended.
*/
if ((error = git_buf_sets(&buf, condition)) < 0)
goto out;
if (git_path_is_dirsep(condition[strlen(condition) - 1]) &&
(error = git_buf_puts(&buf, "**")) < 0)
goto out;
*matches = wildmatch(buf.ptr, reference.ptr, WM_PATHNAME) == WM_MATCH;
out:
git_buf_dispose(&reference);
git_buf_dispose(&buf);
return error;
}
static const struct {
const char *prefix;
int (*matches)(int *matches, const git_repository *repo, const char *cfg, const char *value);
} conditions[] = {
{ "gitdir:", conditional_match_gitdir },
{ "gitdir/i:", conditional_match_gitdir_i },
{ "onbranch:", conditional_match_onbranch }
};
static int parse_conditional_include(config_file_parse_data *parse_data, const char *section, const char *file)
{
char *condition;
size_t i;
int error = 0, matches;
if (!parse_data->repo || !file)
return 0;
condition = git__substrdup(section + strlen("includeIf."),
strlen(section) - strlen("includeIf.") - strlen(".path"));
for (i = 0; i < ARRAY_SIZE(conditions); i++) {
if (git__prefixcmp(condition, conditions[i].prefix))
continue;
if ((error = conditions[i].matches(&matches,
parse_data->repo,
parse_data->file->path,
condition + strlen(conditions[i].prefix))) < 0)
break;
if (matches)
error = parse_include(parse_data, file);
break;
}
git__free(condition);
return error;
}
static int read_on_variable(
git_config_parser *reader,
const char *current_section,
const char *var_name,
const char *var_value,
const char *line,
size_t line_len,
void *data)
{
config_file_parse_data *parse_data = (config_file_parse_data *)data;
git_buf buf = GIT_BUF_INIT;
git_config_entry *entry;
const char *c;
int result = 0;
GIT_UNUSED(reader);
GIT_UNUSED(line);
GIT_UNUSED(line_len);
if (current_section) {
/* TODO: Once warnings lang, we should likely warn
* here. Git appears to warn in most cases if it sees
* un-namespaced config options.
*/
git_buf_puts(&buf, current_section);
git_buf_putc(&buf, '.');
}
for (c = var_name; *c; c++)
git_buf_putc(&buf, git__tolower(*c));
if (git_buf_oom(&buf))
return -1;
entry = git__calloc(1, sizeof(git_config_entry));
GIT_ERROR_CHECK_ALLOC(entry);
entry->name = git_buf_detach(&buf);
entry->value = var_value ? git__strdup(var_value) : NULL;
entry->level = parse_data->level;
entry->include_depth = parse_data->depth;
if ((result = git_config_entries_append(parse_data->entries, entry)) < 0)
return result;
result = 0;
/* Add or append the new config option */
if (!git__strcmp(entry->name, "include.path"))
result = parse_include(parse_data, entry->value);
else if (!git__prefixcmp(entry->name, "includeif.") &&
!git__suffixcmp(entry->name, ".path"))
result = parse_conditional_include(parse_data, entry->name, entry->value);
return result;
}
static int config_file_read_buffer(
git_config_entries *entries,
const git_repository *repo,
config_file *file,
git_config_level_t level,
int depth,
const char *buf,
size_t buflen)
{
config_file_parse_data parse_data;
git_config_parser reader;
int error;
if (depth >= MAX_INCLUDE_DEPTH) {
git_error_set(GIT_ERROR_CONFIG, "maximum config include depth reached");
return -1;
}
/* Initialize the reading position */
reader.path = file->path;
git_parse_ctx_init(&reader.ctx, buf, buflen);
/* If the file is empty, there's nothing for us to do */
if (!reader.ctx.content || *reader.ctx.content == '\0') {
error = 0;
goto out;
}
parse_data.repo = repo;
parse_data.file = file;
parse_data.entries = entries;
parse_data.level = level;
parse_data.depth = depth;
error = git_config_parse(&reader, NULL, read_on_variable, NULL, NULL, &parse_data);
out:
return error;
}
static int config_file_read(
git_config_entries *entries,
const git_repository *repo,
config_file *file,
git_config_level_t level,
int depth)
{
git_buf contents = GIT_BUF_INIT;
struct stat st;
int error;
if (p_stat(file->path, &st) < 0) {
error = git_path_set_error(errno, file->path, "stat");
goto out;
}
if ((error = git_futils_readbuffer(&contents, file->path)) < 0)
goto out;
git_futils_filestamp_set_from_stat(&file->stamp, &st);
if ((error = git_hash_buf(&file->checksum, contents.ptr, contents.size)) < 0)
goto out;
if ((error = config_file_read_buffer(entries, repo, file, level, depth,
contents.ptr, contents.size)) < 0)
goto out;
out:
git_buf_dispose(&contents);
return error;
}
static int write_section(git_buf *fbuf, const char *key)
{
int result;
const char *dot;
git_buf buf = GIT_BUF_INIT;
/* All of this just for [section "subsection"] */
dot = strchr(key, '.');
git_buf_putc(&buf, '[');
if (dot == NULL) {
git_buf_puts(&buf, key);
} else {
char *escaped;
git_buf_put(&buf, key, dot - key);
escaped = escape_value(dot + 1);
GIT_ERROR_CHECK_ALLOC(escaped);
git_buf_printf(&buf, " \"%s\"", escaped);
git__free(escaped);
}
git_buf_puts(&buf, "]\n");
if (git_buf_oom(&buf))
return -1;
result = git_buf_put(fbuf, git_buf_cstr(&buf), buf.size);
git_buf_dispose(&buf);
return result;
}
static const char *quotes_for_value(const char *value)
{
const char *ptr;
if (value[0] == ' ' || value[0] == '\0')
return "\"";
for (ptr = value; *ptr; ++ptr) {
if (*ptr == ';' || *ptr == '#')
return "\"";
}
if (ptr[-1] == ' ')
return "\"";
return "";
}
struct write_data {
git_buf *buf;
git_buf buffered_comment;
unsigned int in_section : 1,
preg_replaced : 1;
const char *orig_section;
const char *section;
const char *orig_name;
const char *name;
const git_regexp *preg;
const char *value;
};
static int write_line_to(git_buf *buf, const char *line, size_t line_len)
{
int result = git_buf_put(buf, line, line_len);
if (!result && line_len && line[line_len-1] != '\n')
result = git_buf_printf(buf, "\n");
return result;
}
static int write_line(struct write_data *write_data, const char *line, size_t line_len)
{
return write_line_to(write_data->buf, line, line_len);
}
static int write_value(struct write_data *write_data)
{
const char *q;
int result;
q = quotes_for_value(write_data->value);
result = git_buf_printf(write_data->buf,
"\t%s = %s%s%s\n", write_data->orig_name, q, write_data->value, q);
/* If we are updating a single name/value, we're done. Setting `value`
* to `NULL` will prevent us from trying to write it again later (in
* `write_on_section`) if we see the same section repeated.
*/
if (!write_data->preg)
write_data->value = NULL;
return result;
}
static int write_on_section(
git_config_parser *reader,
const char *current_section,
const char *line,
size_t line_len,
void *data)
{
struct write_data *write_data = (struct write_data *)data;
int result = 0;
GIT_UNUSED(reader);
/* If we were previously in the correct section (but aren't anymore)
* and haven't written our value (for a simple name/value set, not
* a multivar), then append it to the end of the section before writing
* the new one.
*/
if (write_data->in_section && !write_data->preg && write_data->value)
result = write_value(write_data);
write_data->in_section = strcmp(current_section, write_data->section) == 0;
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