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https://github.com/git/git
synced 2024-08-27 11:39:22 +00:00
![Junio C Hamano](/assets/img/avatar_default.png)
* sp/smart-http: (37 commits) http-backend: Let gcc check the format of more printf-type functions. http-backend: Fix access beyond end of string. http-backend: Fix bad treatment of uintmax_t in Content-Length t5551-http-fetch: Work around broken Accept header in libcurl t5551-http-fetch: Work around some libcurl versions http-backend: Protect GIT_PROJECT_ROOT from /../ requests Git-aware CGI to provide dumb HTTP transport http-backend: Test configuration options http-backend: Use http.getanyfile to disable dumb HTTP serving test smart http fetch and push http tests: use /dumb/ URL prefix set httpd port before sourcing lib-httpd t5540-http-push: remove redundant fetches Smart HTTP fetch: gzip requests Smart fetch over HTTP: client side Smart push over HTTP: client side Discover refs via smart HTTP server when available http-backend: more explict LocationMatch http-backend: add example for gitweb on same URL http-backend: use mod_alias instead of mod_rewrite ... Conflicts: .gitignore remote-curl.c
712 lines
17 KiB
C
712 lines
17 KiB
C
#include "cache.h"
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#include "pack.h"
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#include "refs.h"
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#include "pkt-line.h"
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#include "run-command.h"
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#include "exec_cmd.h"
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#include "commit.h"
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#include "object.h"
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#include "remote.h"
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#include "transport.h"
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static const char receive_pack_usage[] = "git receive-pack <git-dir>";
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enum deny_action {
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DENY_UNCONFIGURED,
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DENY_IGNORE,
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DENY_WARN,
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DENY_REFUSE,
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};
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static int deny_deletes;
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static int deny_non_fast_forwards;
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static enum deny_action deny_current_branch = DENY_UNCONFIGURED;
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static enum deny_action deny_delete_current = DENY_UNCONFIGURED;
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static int receive_fsck_objects;
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static int receive_unpack_limit = -1;
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static int transfer_unpack_limit = -1;
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static int unpack_limit = 100;
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static int report_status;
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static int prefer_ofs_delta = 1;
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static int auto_update_server_info;
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static int auto_gc = 1;
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static const char *head_name;
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static char *capabilities_to_send;
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static enum deny_action parse_deny_action(const char *var, const char *value)
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{
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if (value) {
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if (!strcasecmp(value, "ignore"))
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return DENY_IGNORE;
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if (!strcasecmp(value, "warn"))
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return DENY_WARN;
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if (!strcasecmp(value, "refuse"))
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return DENY_REFUSE;
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}
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if (git_config_bool(var, value))
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return DENY_REFUSE;
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return DENY_IGNORE;
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}
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static int receive_pack_config(const char *var, const char *value, void *cb)
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{
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if (strcmp(var, "receive.denydeletes") == 0) {
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deny_deletes = git_config_bool(var, value);
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return 0;
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}
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if (strcmp(var, "receive.denynonfastforwards") == 0) {
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deny_non_fast_forwards = git_config_bool(var, value);
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return 0;
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}
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if (strcmp(var, "receive.unpacklimit") == 0) {
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receive_unpack_limit = git_config_int(var, value);
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return 0;
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}
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if (strcmp(var, "transfer.unpacklimit") == 0) {
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transfer_unpack_limit = git_config_int(var, value);
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return 0;
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}
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if (strcmp(var, "receive.fsckobjects") == 0) {
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receive_fsck_objects = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "receive.denycurrentbranch")) {
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deny_current_branch = parse_deny_action(var, value);
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return 0;
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}
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if (strcmp(var, "receive.denydeletecurrent") == 0) {
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deny_delete_current = parse_deny_action(var, value);
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return 0;
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}
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if (strcmp(var, "repack.usedeltabaseoffset") == 0) {
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prefer_ofs_delta = git_config_bool(var, value);
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return 0;
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}
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if (strcmp(var, "receive.updateserverinfo") == 0) {
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auto_update_server_info = git_config_bool(var, value);
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return 0;
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}
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if (strcmp(var, "receive.autogc") == 0) {
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auto_gc = git_config_bool(var, value);
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return 0;
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}
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return git_default_config(var, value, cb);
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}
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static int show_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data)
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{
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if (!capabilities_to_send)
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packet_write(1, "%s %s\n", sha1_to_hex(sha1), path);
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else
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packet_write(1, "%s %s%c%s\n",
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sha1_to_hex(sha1), path, 0, capabilities_to_send);
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capabilities_to_send = NULL;
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return 0;
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}
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static void write_head_info(void)
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{
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for_each_ref(show_ref, NULL);
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if (capabilities_to_send)
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show_ref("capabilities^{}", null_sha1, 0, NULL);
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}
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struct command {
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struct command *next;
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const char *error_string;
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unsigned char old_sha1[20];
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unsigned char new_sha1[20];
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char ref_name[FLEX_ARRAY]; /* more */
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};
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static struct command *commands;
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static const char pre_receive_hook[] = "hooks/pre-receive";
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static const char post_receive_hook[] = "hooks/post-receive";
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static int run_receive_hook(const char *hook_name)
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{
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static char buf[sizeof(commands->old_sha1) * 2 + PATH_MAX + 4];
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struct command *cmd;
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struct child_process proc;
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const char *argv[2];
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int have_input = 0, code;
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for (cmd = commands; !have_input && cmd; cmd = cmd->next) {
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if (!cmd->error_string)
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have_input = 1;
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}
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if (!have_input || access(hook_name, X_OK) < 0)
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return 0;
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argv[0] = hook_name;
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argv[1] = NULL;
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memset(&proc, 0, sizeof(proc));
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proc.argv = argv;
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proc.in = -1;
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proc.stdout_to_stderr = 1;
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code = start_command(&proc);
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if (code)
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return code;
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for (cmd = commands; cmd; cmd = cmd->next) {
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if (!cmd->error_string) {
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size_t n = snprintf(buf, sizeof(buf), "%s %s %s\n",
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sha1_to_hex(cmd->old_sha1),
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sha1_to_hex(cmd->new_sha1),
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cmd->ref_name);
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if (write_in_full(proc.in, buf, n) != n)
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break;
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}
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}
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close(proc.in);
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return finish_command(&proc);
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}
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static int run_update_hook(struct command *cmd)
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{
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static const char update_hook[] = "hooks/update";
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const char *argv[5];
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if (access(update_hook, X_OK) < 0)
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return 0;
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argv[0] = update_hook;
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argv[1] = cmd->ref_name;
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argv[2] = sha1_to_hex(cmd->old_sha1);
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argv[3] = sha1_to_hex(cmd->new_sha1);
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argv[4] = NULL;
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return run_command_v_opt(argv, RUN_COMMAND_NO_STDIN |
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RUN_COMMAND_STDOUT_TO_STDERR);
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}
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static int is_ref_checked_out(const char *ref)
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{
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if (is_bare_repository())
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return 0;
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if (!head_name)
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return 0;
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return !strcmp(head_name, ref);
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}
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static char *warn_unconfigured_deny_msg[] = {
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"Updating the currently checked out branch may cause confusion,",
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"as the index and work tree do not reflect changes that are in HEAD.",
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"As a result, you may see the changes you just pushed into it",
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"reverted when you run 'git diff' over there, and you may want",
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"to run 'git reset --hard' before starting to work to recover.",
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"",
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"You can set 'receive.denyCurrentBranch' configuration variable to",
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"'refuse' in the remote repository to forbid pushing into its",
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"current branch."
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"",
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"To allow pushing into the current branch, you can set it to 'ignore';",
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"but this is not recommended unless you arranged to update its work",
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"tree to match what you pushed in some other way.",
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"",
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"To squelch this message, you can set it to 'warn'.",
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"",
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"Note that the default will change in a future version of git",
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"to refuse updating the current branch unless you have the",
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"configuration variable set to either 'ignore' or 'warn'."
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};
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static void warn_unconfigured_deny(void)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(warn_unconfigured_deny_msg); i++)
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warning("%s", warn_unconfigured_deny_msg[i]);
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}
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static char *warn_unconfigured_deny_delete_current_msg[] = {
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"Deleting the current branch can cause confusion by making the next",
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"'git clone' not check out any file.",
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"",
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"You can set 'receive.denyDeleteCurrent' configuration variable to",
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"'refuse' in the remote repository to disallow deleting the current",
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"branch.",
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"",
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"You can set it to 'ignore' to allow such a delete without a warning.",
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"",
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"To make this warning message less loud, you can set it to 'warn'.",
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"",
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"Note that the default will change in a future version of git",
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"to refuse deleting the current branch unless you have the",
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"configuration variable set to either 'ignore' or 'warn'."
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};
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static void warn_unconfigured_deny_delete_current(void)
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{
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int i;
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for (i = 0;
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i < ARRAY_SIZE(warn_unconfigured_deny_delete_current_msg);
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i++)
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warning("%s", warn_unconfigured_deny_delete_current_msg[i]);
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}
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static const char *update(struct command *cmd)
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{
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const char *name = cmd->ref_name;
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unsigned char *old_sha1 = cmd->old_sha1;
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unsigned char *new_sha1 = cmd->new_sha1;
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struct ref_lock *lock;
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/* only refs/... are allowed */
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if (prefixcmp(name, "refs/") || check_ref_format(name + 5)) {
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error("refusing to create funny ref '%s' remotely", name);
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return "funny refname";
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}
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if (is_ref_checked_out(name)) {
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switch (deny_current_branch) {
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case DENY_IGNORE:
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break;
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case DENY_UNCONFIGURED:
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case DENY_WARN:
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warning("updating the current branch");
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if (deny_current_branch == DENY_UNCONFIGURED)
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warn_unconfigured_deny();
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break;
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case DENY_REFUSE:
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error("refusing to update checked out branch: %s", name);
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return "branch is currently checked out";
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}
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}
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if (!is_null_sha1(new_sha1) && !has_sha1_file(new_sha1)) {
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error("unpack should have generated %s, "
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"but I can't find it!", sha1_to_hex(new_sha1));
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return "bad pack";
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}
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if (!is_null_sha1(old_sha1) && is_null_sha1(new_sha1)) {
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if (deny_deletes && !prefixcmp(name, "refs/heads/")) {
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error("denying ref deletion for %s", name);
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return "deletion prohibited";
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}
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if (!strcmp(name, head_name)) {
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switch (deny_delete_current) {
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case DENY_IGNORE:
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break;
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case DENY_WARN:
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case DENY_UNCONFIGURED:
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if (deny_delete_current == DENY_UNCONFIGURED)
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warn_unconfigured_deny_delete_current();
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warning("deleting the current branch");
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break;
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case DENY_REFUSE:
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error("refusing to delete the current branch: %s", name);
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return "deletion of the current branch prohibited";
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}
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}
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}
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if (deny_non_fast_forwards && !is_null_sha1(new_sha1) &&
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!is_null_sha1(old_sha1) &&
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!prefixcmp(name, "refs/heads/")) {
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struct object *old_object, *new_object;
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struct commit *old_commit, *new_commit;
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struct commit_list *bases, *ent;
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old_object = parse_object(old_sha1);
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new_object = parse_object(new_sha1);
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if (!old_object || !new_object ||
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old_object->type != OBJ_COMMIT ||
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new_object->type != OBJ_COMMIT) {
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error("bad sha1 objects for %s", name);
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return "bad ref";
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}
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old_commit = (struct commit *)old_object;
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new_commit = (struct commit *)new_object;
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bases = get_merge_bases(old_commit, new_commit, 1);
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for (ent = bases; ent; ent = ent->next)
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if (!hashcmp(old_sha1, ent->item->object.sha1))
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break;
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free_commit_list(bases);
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if (!ent) {
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error("denying non-fast-forward %s"
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" (you should pull first)", name);
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return "non-fast-forward";
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}
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}
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if (run_update_hook(cmd)) {
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error("hook declined to update %s", name);
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return "hook declined";
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}
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if (is_null_sha1(new_sha1)) {
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if (!parse_object(old_sha1)) {
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warning ("Allowing deletion of corrupt ref.");
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old_sha1 = NULL;
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}
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if (delete_ref(name, old_sha1, 0)) {
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error("failed to delete %s", name);
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return "failed to delete";
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}
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return NULL; /* good */
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}
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else {
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lock = lock_any_ref_for_update(name, old_sha1, 0);
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if (!lock) {
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error("failed to lock %s", name);
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return "failed to lock";
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}
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if (write_ref_sha1(lock, new_sha1, "push")) {
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return "failed to write"; /* error() already called */
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}
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return NULL; /* good */
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}
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}
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static char update_post_hook[] = "hooks/post-update";
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static void run_update_post_hook(struct command *cmd)
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{
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struct command *cmd_p;
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int argc, status;
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const char **argv;
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for (argc = 0, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
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if (cmd_p->error_string)
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continue;
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argc++;
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}
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if (!argc || access(update_post_hook, X_OK) < 0)
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return;
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argv = xmalloc(sizeof(*argv) * (2 + argc));
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argv[0] = update_post_hook;
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for (argc = 1, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
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char *p;
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if (cmd_p->error_string)
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continue;
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p = xmalloc(strlen(cmd_p->ref_name) + 1);
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strcpy(p, cmd_p->ref_name);
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argv[argc] = p;
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argc++;
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}
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argv[argc] = NULL;
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status = run_command_v_opt(argv, RUN_COMMAND_NO_STDIN
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| RUN_COMMAND_STDOUT_TO_STDERR);
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}
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static void execute_commands(const char *unpacker_error)
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{
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struct command *cmd = commands;
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unsigned char sha1[20];
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if (unpacker_error) {
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while (cmd) {
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cmd->error_string = "n/a (unpacker error)";
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cmd = cmd->next;
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}
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return;
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}
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if (run_receive_hook(pre_receive_hook)) {
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while (cmd) {
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cmd->error_string = "pre-receive hook declined";
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cmd = cmd->next;
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}
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return;
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}
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head_name = resolve_ref("HEAD", sha1, 0, NULL);
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while (cmd) {
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cmd->error_string = update(cmd);
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cmd = cmd->next;
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}
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}
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static void read_head_info(void)
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{
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struct command **p = &commands;
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for (;;) {
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static char line[1000];
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unsigned char old_sha1[20], new_sha1[20];
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struct command *cmd;
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char *refname;
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int len, reflen;
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len = packet_read_line(0, line, sizeof(line));
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if (!len)
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break;
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if (line[len-1] == '\n')
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line[--len] = 0;
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if (len < 83 ||
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line[40] != ' ' ||
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line[81] != ' ' ||
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get_sha1_hex(line, old_sha1) ||
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get_sha1_hex(line + 41, new_sha1))
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die("protocol error: expected old/new/ref, got '%s'",
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line);
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refname = line + 82;
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reflen = strlen(refname);
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if (reflen + 82 < len) {
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if (strstr(refname + reflen + 1, "report-status"))
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report_status = 1;
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}
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cmd = xmalloc(sizeof(struct command) + len - 80);
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hashcpy(cmd->old_sha1, old_sha1);
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hashcpy(cmd->new_sha1, new_sha1);
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memcpy(cmd->ref_name, line + 82, len - 81);
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cmd->error_string = NULL;
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cmd->next = NULL;
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*p = cmd;
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p = &cmd->next;
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}
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}
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static const char *parse_pack_header(struct pack_header *hdr)
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{
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switch (read_pack_header(0, hdr)) {
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case PH_ERROR_EOF:
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return "eof before pack header was fully read";
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case PH_ERROR_PACK_SIGNATURE:
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return "protocol error (pack signature mismatch detected)";
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case PH_ERROR_PROTOCOL:
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return "protocol error (pack version unsupported)";
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default:
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return "unknown error in parse_pack_header";
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case 0:
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return NULL;
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}
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}
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static const char *pack_lockfile;
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static const char *unpack(void)
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{
|
|
struct pack_header hdr;
|
|
const char *hdr_err;
|
|
char hdr_arg[38];
|
|
|
|
hdr_err = parse_pack_header(&hdr);
|
|
if (hdr_err)
|
|
return hdr_err;
|
|
snprintf(hdr_arg, sizeof(hdr_arg),
|
|
"--pack_header=%"PRIu32",%"PRIu32,
|
|
ntohl(hdr.hdr_version), ntohl(hdr.hdr_entries));
|
|
|
|
if (ntohl(hdr.hdr_entries) < unpack_limit) {
|
|
int code, i = 0;
|
|
const char *unpacker[4];
|
|
unpacker[i++] = "unpack-objects";
|
|
if (receive_fsck_objects)
|
|
unpacker[i++] = "--strict";
|
|
unpacker[i++] = hdr_arg;
|
|
unpacker[i++] = NULL;
|
|
code = run_command_v_opt(unpacker, RUN_GIT_CMD);
|
|
if (!code)
|
|
return NULL;
|
|
return "unpack-objects abnormal exit";
|
|
} else {
|
|
const char *keeper[7];
|
|
int s, status, i = 0;
|
|
char keep_arg[256];
|
|
struct child_process ip;
|
|
|
|
s = sprintf(keep_arg, "--keep=receive-pack %"PRIuMAX" on ", (uintmax_t) getpid());
|
|
if (gethostname(keep_arg + s, sizeof(keep_arg) - s))
|
|
strcpy(keep_arg + s, "localhost");
|
|
|
|
keeper[i++] = "index-pack";
|
|
keeper[i++] = "--stdin";
|
|
if (receive_fsck_objects)
|
|
keeper[i++] = "--strict";
|
|
keeper[i++] = "--fix-thin";
|
|
keeper[i++] = hdr_arg;
|
|
keeper[i++] = keep_arg;
|
|
keeper[i++] = NULL;
|
|
memset(&ip, 0, sizeof(ip));
|
|
ip.argv = keeper;
|
|
ip.out = -1;
|
|
ip.git_cmd = 1;
|
|
status = start_command(&ip);
|
|
if (status) {
|
|
return "index-pack fork failed";
|
|
}
|
|
pack_lockfile = index_pack_lockfile(ip.out);
|
|
close(ip.out);
|
|
status = finish_command(&ip);
|
|
if (!status) {
|
|
reprepare_packed_git();
|
|
return NULL;
|
|
}
|
|
return "index-pack abnormal exit";
|
|
}
|
|
}
|
|
|
|
static void report(const char *unpack_status)
|
|
{
|
|
struct command *cmd;
|
|
packet_write(1, "unpack %s\n",
|
|
unpack_status ? unpack_status : "ok");
|
|
for (cmd = commands; cmd; cmd = cmd->next) {
|
|
if (!cmd->error_string)
|
|
packet_write(1, "ok %s\n",
|
|
cmd->ref_name);
|
|
else
|
|
packet_write(1, "ng %s %s\n",
|
|
cmd->ref_name, cmd->error_string);
|
|
}
|
|
packet_flush(1);
|
|
}
|
|
|
|
static int delete_only(struct command *cmd)
|
|
{
|
|
while (cmd) {
|
|
if (!is_null_sha1(cmd->new_sha1))
|
|
return 0;
|
|
cmd = cmd->next;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int add_refs_from_alternate(struct alternate_object_database *e, void *unused)
|
|
{
|
|
char *other;
|
|
size_t len;
|
|
struct remote *remote;
|
|
struct transport *transport;
|
|
const struct ref *extra;
|
|
|
|
e->name[-1] = '\0';
|
|
other = xstrdup(make_absolute_path(e->base));
|
|
e->name[-1] = '/';
|
|
len = strlen(other);
|
|
|
|
while (other[len-1] == '/')
|
|
other[--len] = '\0';
|
|
if (len < 8 || memcmp(other + len - 8, "/objects", 8))
|
|
return 0;
|
|
/* Is this a git repository with refs? */
|
|
memcpy(other + len - 8, "/refs", 6);
|
|
if (!is_directory(other))
|
|
return 0;
|
|
other[len - 8] = '\0';
|
|
remote = remote_get(other);
|
|
transport = transport_get(remote, other);
|
|
for (extra = transport_get_remote_refs(transport);
|
|
extra;
|
|
extra = extra->next) {
|
|
add_extra_ref(".have", extra->old_sha1, 0);
|
|
}
|
|
transport_disconnect(transport);
|
|
free(other);
|
|
return 0;
|
|
}
|
|
|
|
static void add_alternate_refs(void)
|
|
{
|
|
foreach_alt_odb(add_refs_from_alternate, NULL);
|
|
}
|
|
|
|
int cmd_receive_pack(int argc, const char **argv, const char *prefix)
|
|
{
|
|
int advertise_refs = 0;
|
|
int stateless_rpc = 0;
|
|
int i;
|
|
char *dir = NULL;
|
|
|
|
argv++;
|
|
for (i = 1; i < argc; i++) {
|
|
const char *arg = *argv++;
|
|
|
|
if (*arg == '-') {
|
|
if (!strcmp(arg, "--advertise-refs")) {
|
|
advertise_refs = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(arg, "--stateless-rpc")) {
|
|
stateless_rpc = 1;
|
|
continue;
|
|
}
|
|
|
|
usage(receive_pack_usage);
|
|
}
|
|
if (dir)
|
|
usage(receive_pack_usage);
|
|
dir = xstrdup(arg);
|
|
}
|
|
if (!dir)
|
|
usage(receive_pack_usage);
|
|
|
|
setup_path();
|
|
|
|
if (!enter_repo(dir, 0))
|
|
die("'%s' does not appear to be a git repository", dir);
|
|
|
|
if (is_repository_shallow())
|
|
die("attempt to push into a shallow repository");
|
|
|
|
git_config(receive_pack_config, NULL);
|
|
|
|
if (0 <= transfer_unpack_limit)
|
|
unpack_limit = transfer_unpack_limit;
|
|
else if (0 <= receive_unpack_limit)
|
|
unpack_limit = receive_unpack_limit;
|
|
|
|
capabilities_to_send = (prefer_ofs_delta) ?
|
|
" report-status delete-refs ofs-delta " :
|
|
" report-status delete-refs ";
|
|
|
|
if (advertise_refs || !stateless_rpc) {
|
|
add_alternate_refs();
|
|
write_head_info();
|
|
clear_extra_refs();
|
|
|
|
/* EOF */
|
|
packet_flush(1);
|
|
}
|
|
if (advertise_refs)
|
|
return 0;
|
|
|
|
read_head_info();
|
|
if (commands) {
|
|
const char *unpack_status = NULL;
|
|
|
|
if (!delete_only(commands))
|
|
unpack_status = unpack();
|
|
execute_commands(unpack_status);
|
|
if (pack_lockfile)
|
|
unlink_or_warn(pack_lockfile);
|
|
if (report_status)
|
|
report(unpack_status);
|
|
run_receive_hook(post_receive_hook);
|
|
run_update_post_hook(commands);
|
|
if (auto_gc) {
|
|
const char *argv_gc_auto[] = {
|
|
"gc", "--auto", "--quiet", NULL,
|
|
};
|
|
run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
|
|
}
|
|
if (auto_update_server_info)
|
|
update_server_info(0);
|
|
}
|
|
return 0;
|
|
}
|