mirror of
https://git.proxmox.com/git/libgit2
synced 2025-05-08 19:51:31 +00:00
80a665aaca
Instead of just setting the value to NULL, which gives unwanted results when asking for that variable after deleting it, delete the variable from the list and re-write the file.
460 lines
10 KiB
C
460 lines
10 KiB
C
/*
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* Copyright (C) 2009-2011 the libgit2 contributors
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*
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* This file is part of libgit2, distributed under the GNU GPL v2 with
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* a Linking Exception. For full terms see the included COPYING file.
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*/
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#include "common.h"
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#include "fileops.h"
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#include "hashtable.h"
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#include "config.h"
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#include "git2/config.h"
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#include "vector.h"
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#if GIT_WIN32
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# include <windows.h>
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#endif
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#include <ctype.h>
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typedef struct {
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git_config_file *file;
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int priority;
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} file_internal;
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static void config_free(git_config *cfg)
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{
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unsigned int i;
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git_config_file *file;
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file_internal *internal;
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for(i = 0; i < cfg->files.length; ++i){
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internal = git_vector_get(&cfg->files, i);
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file = internal->file;
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file->free(file);
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git__free(internal);
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}
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git_vector_free(&cfg->files);
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git__free(cfg);
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}
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void git_config_free(git_config *cfg)
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{
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if (cfg == NULL)
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return;
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GIT_REFCOUNT_DEC(cfg, config_free);
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}
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static int config_backend_cmp(const void *a, const void *b)
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{
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const file_internal *bk_a = (const file_internal *)(a);
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const file_internal *bk_b = (const file_internal *)(b);
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return bk_b->priority - bk_a->priority;
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}
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int git_config_new(git_config **out)
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{
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git_config *cfg;
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cfg = git__malloc(sizeof(git_config));
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if (cfg == NULL)
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return GIT_ENOMEM;
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memset(cfg, 0x0, sizeof(git_config));
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if (git_vector_init(&cfg->files, 3, config_backend_cmp) < 0) {
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git__free(cfg);
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return GIT_ENOMEM;
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}
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*out = cfg;
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GIT_REFCOUNT_INC(cfg);
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return GIT_SUCCESS;
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}
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int git_config_add_file_ondisk(git_config *cfg, const char *path, int priority)
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{
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git_config_file *file = NULL;
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int error;
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error = git_config_file__ondisk(&file, path);
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if (error < GIT_SUCCESS)
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return error;
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error = git_config_add_file(cfg, file, priority);
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if (error < GIT_SUCCESS) {
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/*
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* free manually; the file is not owned by the config
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* instance yet and will not be freed on cleanup
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*/
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file->free(file);
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return error;
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}
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return GIT_SUCCESS;
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}
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int git_config_open_ondisk(git_config **cfg, const char *path)
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{
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int error;
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error = git_config_new(cfg);
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if (error < GIT_SUCCESS)
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return error;
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error = git_config_add_file_ondisk(*cfg, path, 1);
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if (error < GIT_SUCCESS)
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git_config_free(*cfg);
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return error;
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}
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int git_config_add_file(git_config *cfg, git_config_file *file, int priority)
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{
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file_internal *internal;
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int error;
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assert(cfg && file);
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if ((error = file->open(file)) < GIT_SUCCESS)
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return git__rethrow(error, "Failed to open config file");
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internal = git__malloc(sizeof(file_internal));
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if (internal == NULL)
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return GIT_ENOMEM;
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internal->file = file;
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internal->priority = priority;
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if (git_vector_insert(&cfg->files, internal) < 0) {
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git__free(internal);
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return GIT_ENOMEM;
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}
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git_vector_sort(&cfg->files);
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internal->file->cfg = cfg;
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return GIT_SUCCESS;
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}
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/*
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* Loop over all the variables
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*/
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int git_config_foreach(git_config *cfg, int (*fn)(const char *, const char *, void *), void *data)
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{
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int ret = GIT_SUCCESS;
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unsigned int i;
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file_internal *internal;
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git_config_file *file;
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for(i = 0; i < cfg->files.length && ret == 0; ++i) {
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internal = git_vector_get(&cfg->files, i);
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file = internal->file;
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ret = file->foreach(file, fn, data);
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}
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return ret;
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}
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int git_config_delete(git_config *cfg, const char *name)
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{
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file_internal *internal;
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git_config_file *file;
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if (cfg->files.length == 0)
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return git__throw(GIT_EINVALIDARGS, "Cannot delete variable; no files open in the `git_config` instance");
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internal = git_vector_get(&cfg->files, 0);
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file = internal->file;
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return file->delete(file, name);
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}
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/**************
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* Setters
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**************/
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int git_config_set_int64(git_config *cfg, const char *name, int64_t value)
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{
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char str_value[32]; /* All numbers should fit in here */
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p_snprintf(str_value, sizeof(str_value), "%" PRId64, value);
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return git_config_set_string(cfg, name, str_value);
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}
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int git_config_set_int32(git_config *cfg, const char *name, int32_t value)
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{
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return git_config_set_int64(cfg, name, (int64_t)value);
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}
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int git_config_set_bool(git_config *cfg, const char *name, int value)
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{
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return git_config_set_string(cfg, name, value ? "true" : "false");
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}
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int git_config_set_string(git_config *cfg, const char *name, const char *value)
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{
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file_internal *internal;
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git_config_file *file;
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if (cfg->files.length == 0)
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return git__throw(GIT_EINVALIDARGS, "Cannot set variable value; no files open in the `git_config` instance");
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internal = git_vector_get(&cfg->files, 0);
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file = internal->file;
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return file->set(file, name, value);
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}
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/***********
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* Getters
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***********/
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int git_config_get_int64(git_config *cfg, const char *name, int64_t *out)
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{
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const char *value, *num_end;
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int ret;
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int64_t num;
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ret = git_config_get_string(cfg, name, &value);
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if (ret < GIT_SUCCESS)
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return git__rethrow(ret, "Failed to retrieve value for '%s'", name);
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ret = git__strtol64(&num, value, &num_end, 0);
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if (ret < GIT_SUCCESS)
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return git__rethrow(ret, "Failed to convert value for '%s'", name);
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switch (*num_end) {
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case 'g':
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case 'G':
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num *= 1024;
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/* fallthrough */
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case 'm':
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case 'M':
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num *= 1024;
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/* fallthrough */
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case 'k':
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case 'K':
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num *= 1024;
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/* check that that there are no more characters after the
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* given modifier suffix */
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if (num_end[1] != '\0')
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return git__throw(GIT_EINVALIDTYPE,
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"Failed to get value for '%s'. Invalid type suffix", name);
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/* fallthrough */
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case '\0':
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*out = num;
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return GIT_SUCCESS;
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default:
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return git__throw(GIT_EINVALIDTYPE,
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"Failed to get value for '%s'. Value is of invalid type", name);
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}
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}
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int git_config_get_int32(git_config *cfg, const char *name, int32_t *out)
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{
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int64_t tmp_long;
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int32_t tmp_int;
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int ret;
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ret = git_config_get_int64(cfg, name, &tmp_long);
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if (ret < GIT_SUCCESS)
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return git__rethrow(ret, "Failed to convert value for '%s'", name);
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tmp_int = tmp_long & 0xFFFFFFFF;
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if (tmp_int != tmp_long)
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return git__throw(GIT_EOVERFLOW, "Value for '%s' is too large", name);
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*out = tmp_int;
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return ret;
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}
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int git_config_get_bool(git_config *cfg, const char *name, int *out)
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{
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const char *value;
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int error = GIT_SUCCESS;
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error = git_config_get_string(cfg, name, &value);
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if (error < GIT_SUCCESS)
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return git__rethrow(error, "Failed to get value for %s", name);
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/* A missing value means true */
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if (value == NULL) {
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*out = 1;
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return GIT_SUCCESS;
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}
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if (!strcasecmp(value, "true") ||
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!strcasecmp(value, "yes") ||
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!strcasecmp(value, "on")) {
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*out = 1;
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return GIT_SUCCESS;
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}
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if (!strcasecmp(value, "false") ||
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!strcasecmp(value, "no") ||
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!strcasecmp(value, "off")) {
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*out = 0;
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return GIT_SUCCESS;
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}
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/* Try to parse it as an integer */
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error = git_config_get_int32(cfg, name, out);
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if (error == GIT_SUCCESS)
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*out = !!(*out);
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if (error < GIT_SUCCESS)
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return git__rethrow(error, "Failed to get value for %s", name);
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return error;
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}
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int git_config_get_string(git_config *cfg, const char *name, const char **out)
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{
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file_internal *internal;
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git_config_file *file;
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int error = GIT_ENOTFOUND;
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unsigned int i;
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if (cfg->files.length == 0)
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return git__throw(GIT_EINVALIDARGS, "Cannot get variable value; no files open in the `git_config` instance");
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for (i = 0; i < cfg->files.length; ++i) {
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internal = git_vector_get(&cfg->files, i);
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file = internal->file;
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if ((error = file->get(file, name, out)) == GIT_SUCCESS)
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return GIT_SUCCESS;
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}
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return git__throw(error, "Config value '%s' not found", name);
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}
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int git_config_find_global(char *global_config_path)
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{
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git_buf path = GIT_BUF_INIT;
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int error = git_config_find_global_r(&path);
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if (error == GIT_SUCCESS) {
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if (path.size > GIT_PATH_MAX)
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error = git__throw(GIT_ESHORTBUFFER, "Path is too long");
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else
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git_buf_copy_cstr(global_config_path, GIT_PATH_MAX, &path);
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}
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git_buf_free(&path);
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return error;
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}
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int git_config_find_global_r(git_buf *path)
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{
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int error;
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const char *home = getenv("HOME");
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#ifdef GIT_WIN32
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if (home == NULL)
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home = getenv("USERPROFILE");
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#endif
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if (home == NULL)
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return git__throw(GIT_EOSERR, "Failed to open global config file. Cannot locate the user's home directory");
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if ((error = git_buf_joinpath(path, home, GIT_CONFIG_FILENAME)) < GIT_SUCCESS)
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return error;
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if (git_futils_exists(path->ptr) < GIT_SUCCESS) {
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git_buf_clear(path);
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return git__throw(GIT_EOSERR, "Failed to open global config file. The file does not exist");
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}
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return GIT_SUCCESS;
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}
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#if GIT_WIN32
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static int win32_find_system(git_buf *system_config_path)
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{
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const wchar_t *query = L"%PROGRAMFILES%\\Git\\etc\\gitconfig";
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wchar_t *apphome_utf16;
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char *apphome_utf8;
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DWORD size, ret;
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size = ExpandEnvironmentStringsW(query, NULL, 0);
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/* The function gave us the full size of the buffer in chars, including NUL */
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apphome_utf16 = git__malloc(size * sizeof(wchar_t));
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if (apphome_utf16 == NULL)
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return GIT_ENOMEM;
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ret = ExpandEnvironmentStringsW(query, apphome_utf16, size);
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if (ret != size)
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return git__throw(GIT_ERROR, "Failed to expand environment strings");
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if (_waccess(apphome_utf16, F_OK) < 0) {
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git__free(apphome_utf16);
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return GIT_ENOTFOUND;
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}
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apphome_utf8 = gitwin_from_utf16(apphome_utf16);
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git__free(apphome_utf16);
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git_buf_attach(system_config_path, apphome_utf8, 0);
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return GIT_SUCCESS;
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}
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#endif
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int git_config_find_system_r(git_buf *system_config_path)
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{
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if (git_buf_sets(system_config_path, "/etc/gitconfig") < GIT_SUCCESS)
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return git_buf_lasterror(system_config_path);
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if (git_futils_exists(system_config_path->ptr) == GIT_SUCCESS)
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return GIT_SUCCESS;
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git_buf_clear(system_config_path);
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#if GIT_WIN32
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return win32_find_system(system_config_path);
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#else
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return GIT_ENOTFOUND;
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#endif
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}
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int git_config_find_system(char *system_config_path)
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{
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git_buf path = GIT_BUF_INIT;
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int error = git_config_find_system_r(&path);
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if (error == GIT_SUCCESS) {
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if (path.size > GIT_PATH_MAX)
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error = git__throw(GIT_ESHORTBUFFER, "Path is too long");
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else
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git_buf_copy_cstr(system_config_path, GIT_PATH_MAX, &path);
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}
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git_buf_free(&path);
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return error;
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}
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int git_config_open_global(git_config **out)
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{
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int error;
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char global_path[GIT_PATH_MAX];
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if ((error = git_config_find_global(global_path)) < GIT_SUCCESS)
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return error;
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return git_config_open_ondisk(out, global_path);
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}
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