summaryrefslogtreecommitdiff
path: root/receive-pack.c
diff options
context:
space:
mode:
Diffstat (limited to 'receive-pack.c')
-rw-r--r--receive-pack.c458
1 files changed, 0 insertions, 458 deletions
diff --git a/receive-pack.c b/receive-pack.c
deleted file mode 100644
index 7f1dcc045c..0000000000
--- a/receive-pack.c
+++ /dev/null
@@ -1,458 +0,0 @@
-#include "cache.h"
-#include "pack.h"
-#include "refs.h"
-#include "pkt-line.h"
-#include "run-command.h"
-#include "exec_cmd.h"
-#include "commit.h"
-#include "object.h"
-
-static const char receive_pack_usage[] = "git-receive-pack <git-dir>";
-
-static int deny_non_fast_forwards = 0;
-static int receive_unpack_limit = -1;
-static int transfer_unpack_limit = -1;
-static int unpack_limit = 100;
-static int report_status;
-
-static char capabilities[] = " report-status delete-refs ";
-static int capabilities_sent;
-
-static int receive_pack_config(const char *var, const char *value)
-{
- if (strcmp(var, "receive.denynonfastforwards") == 0) {
- deny_non_fast_forwards = git_config_bool(var, value);
- return 0;
- }
-
- if (strcmp(var, "receive.unpacklimit") == 0) {
- receive_unpack_limit = git_config_int(var, value);
- return 0;
- }
-
- if (strcmp(var, "transfer.unpacklimit") == 0) {
- transfer_unpack_limit = git_config_int(var, value);
- return 0;
- }
-
- return git_default_config(var, value);
-}
-
-static int show_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data)
-{
- if (capabilities_sent)
- packet_write(1, "%s %s\n", sha1_to_hex(sha1), path);
- else
- packet_write(1, "%s %s%c%s\n",
- sha1_to_hex(sha1), path, 0, capabilities);
- capabilities_sent = 1;
- return 0;
-}
-
-static void write_head_info(void)
-{
- for_each_ref(show_ref, NULL);
- if (!capabilities_sent)
- show_ref("capabilities^{}", null_sha1, 0, NULL);
-
-}
-
-struct command {
- struct command *next;
- const char *error_string;
- unsigned char old_sha1[20];
- unsigned char new_sha1[20];
- char ref_name[FLEX_ARRAY]; /* more */
-};
-
-static struct command *commands;
-
-static char update_hook[] = "hooks/update";
-
-static int run_update_hook(const char *refname,
- char *old_hex, char *new_hex)
-{
- int code;
-
- if (access(update_hook, X_OK) < 0)
- return 0;
- code = run_command_opt(RUN_COMMAND_NO_STDIN
- | RUN_COMMAND_STDOUT_TO_STDERR,
- update_hook, refname, old_hex, new_hex, NULL);
- switch (code) {
- case 0:
- return 0;
- case -ERR_RUN_COMMAND_FORK:
- return error("hook fork failed");
- case -ERR_RUN_COMMAND_EXEC:
- return error("hook execute failed");
- case -ERR_RUN_COMMAND_WAITPID:
- return error("waitpid failed");
- case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
- return error("waitpid is confused");
- case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
- return error("%s died of signal", update_hook);
- case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
- return error("%s died strangely", update_hook);
- default:
- error("%s exited with error code %d", update_hook, -code);
- return -code;
- }
-}
-
-static int update(struct command *cmd)
-{
- const char *name = cmd->ref_name;
- unsigned char *old_sha1 = cmd->old_sha1;
- unsigned char *new_sha1 = cmd->new_sha1;
- char new_hex[41], old_hex[41];
- struct ref_lock *lock;
-
- cmd->error_string = NULL;
- if (!prefixcmp(name, "refs/") && check_ref_format(name + 5)) {
- cmd->error_string = "funny refname";
- return error("refusing to create funny ref '%s' locally",
- name);
- }
-
- strcpy(new_hex, sha1_to_hex(new_sha1));
- strcpy(old_hex, sha1_to_hex(old_sha1));
-
- if (!is_null_sha1(new_sha1) && !has_sha1_file(new_sha1)) {
- cmd->error_string = "bad pack";
- return error("unpack should have generated %s, "
- "but I can't find it!", new_hex);
- }
- if (deny_non_fast_forwards && !is_null_sha1(new_sha1) &&
- !is_null_sha1(old_sha1) &&
- !prefixcmp(name, "refs/heads/")) {
- struct commit *old_commit, *new_commit;
- struct commit_list *bases, *ent;
-
- old_commit = (struct commit *)parse_object(old_sha1);
- new_commit = (struct commit *)parse_object(new_sha1);
- bases = get_merge_bases(old_commit, new_commit, 1);
- for (ent = bases; ent; ent = ent->next)
- if (!hashcmp(old_sha1, ent->item->object.sha1))
- break;
- free_commit_list(bases);
- if (!ent)
- return error("denying non-fast forward;"
- " you should pull first");
- }
- if (run_update_hook(name, old_hex, new_hex)) {
- cmd->error_string = "hook declined";
- return error("hook declined to update %s", name);
- }
-
- if (is_null_sha1(new_sha1)) {
- if (delete_ref(name, old_sha1)) {
- cmd->error_string = "failed to delete";
- return error("failed to delete %s", name);
- }
- fprintf(stderr, "%s: %s -> deleted\n", name, old_hex);
- }
- else {
- lock = lock_any_ref_for_update(name, old_sha1);
- if (!lock) {
- cmd->error_string = "failed to lock";
- return error("failed to lock %s", name);
- }
- write_ref_sha1(lock, new_sha1, "push");
- fprintf(stderr, "%s: %s -> %s\n", name, old_hex, new_hex);
- }
- return 0;
-}
-
-static char update_post_hook[] = "hooks/post-update";
-
-static void run_update_post_hook(struct command *cmd)
-{
- struct command *cmd_p;
- int argc;
- const char **argv;
-
- if (access(update_post_hook, X_OK) < 0)
- return;
- for (argc = 1, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
- if (cmd_p->error_string)
- continue;
- argc++;
- }
- argv = xmalloc(sizeof(*argv) * (1 + argc));
- argv[0] = update_post_hook;
-
- for (argc = 1, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
- char *p;
- if (cmd_p->error_string)
- continue;
- p = xmalloc(strlen(cmd_p->ref_name) + 1);
- strcpy(p, cmd_p->ref_name);
- argv[argc] = p;
- argc++;
- }
- argv[argc] = NULL;
- run_command_v_opt(argv, RUN_COMMAND_NO_STDIN
- | RUN_COMMAND_STDOUT_TO_STDERR);
-}
-
-/*
- * This gets called after(if) we've successfully
- * unpacked the data payload.
- */
-static void execute_commands(void)
-{
- struct command *cmd = commands;
-
- while (cmd) {
- update(cmd);
- cmd = cmd->next;
- }
- run_update_post_hook(commands);
-}
-
-static void read_head_info(void)
-{
- struct command **p = &commands;
- for (;;) {
- static char line[1000];
- unsigned char old_sha1[20], new_sha1[20];
- struct command *cmd;
- char *refname;
- int len, reflen;
-
- len = packet_read_line(0, line, sizeof(line));
- if (!len)
- break;
- if (line[len-1] == '\n')
- line[--len] = 0;
- if (len < 83 ||
- line[40] != ' ' ||
- line[81] != ' ' ||
- get_sha1_hex(line, old_sha1) ||
- get_sha1_hex(line + 41, new_sha1))
- die("protocol error: expected old/new/ref, got '%s'",
- line);
-
- refname = line + 82;
- reflen = strlen(refname);
- if (reflen + 82 < len) {
- if (strstr(refname + reflen + 1, "report-status"))
- report_status = 1;
- }
- cmd = xmalloc(sizeof(struct command) + len - 80);
- hashcpy(cmd->old_sha1, old_sha1);
- hashcpy(cmd->new_sha1, new_sha1);
- memcpy(cmd->ref_name, line + 82, len - 81);
- cmd->error_string = "n/a (unpacker error)";
- cmd->next = NULL;
- *p = cmd;
- p = &cmd->next;
- }
-}
-
-static const char *parse_pack_header(struct pack_header *hdr)
-{
- switch (read_pack_header(0, hdr)) {
- case PH_ERROR_EOF:
- return "eof before pack header was fully read";
-
- case PH_ERROR_PACK_SIGNATURE:
- return "protocol error (pack signature mismatch detected)";
-
- case PH_ERROR_PROTOCOL:
- return "protocol error (pack version unsupported)";
-
- default:
- return "unknown error in parse_pack_header";
-
- case 0:
- return NULL;
- }
-}
-
-static const char *pack_lockfile;
-
-static const char *unpack(void)
-{
- 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=%u,%u",
- ntohl(hdr.hdr_version), ntohl(hdr.hdr_entries));
-
- if (ntohl(hdr.hdr_entries) < unpack_limit) {
- int code;
- const char *unpacker[3];
- unpacker[0] = "unpack-objects";
- unpacker[1] = hdr_arg;
- unpacker[2] = NULL;
- code = run_command_v_opt(unpacker, RUN_GIT_CMD);
- switch (code) {
- case 0:
- return NULL;
- case -ERR_RUN_COMMAND_FORK:
- return "unpack fork failed";
- case -ERR_RUN_COMMAND_EXEC:
- return "unpack execute failed";
- case -ERR_RUN_COMMAND_WAITPID:
- return "waitpid failed";
- case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
- return "waitpid is confused";
- case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
- return "unpacker died of signal";
- case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
- return "unpacker died strangely";
- default:
- return "unpacker exited with error code";
- }
- } else {
- const char *keeper[6];
- int fd[2], s, len, status;
- pid_t pid;
- char keep_arg[256];
- char packname[46];
-
- s = sprintf(keep_arg, "--keep=receive-pack %i on ", getpid());
- if (gethostname(keep_arg + s, sizeof(keep_arg) - s))
- strcpy(keep_arg + s, "localhost");
-
- keeper[0] = "index-pack";
- keeper[1] = "--stdin";
- keeper[2] = "--fix-thin";
- keeper[3] = hdr_arg;
- keeper[4] = keep_arg;
- keeper[5] = NULL;
-
- if (pipe(fd) < 0)
- return "index-pack pipe failed";
- pid = fork();
- if (pid < 0)
- return "index-pack fork failed";
- if (!pid) {
- dup2(fd[1], 1);
- close(fd[1]);
- close(fd[0]);
- execv_git_cmd(keeper);
- die("execv of index-pack failed");
- }
- close(fd[1]);
-
- /*
- * The first thing we expects from index-pack's output
- * is "pack\t%40s\n" or "keep\t%40s\n" (46 bytes) where
- * %40s is the newly created pack SHA1 name. In the "keep"
- * case, we need it to remove the corresponding .keep file
- * later on. If we don't get that then tough luck with it.
- */
- for (len = 0;
- len < 46 && (s = xread(fd[0], packname+len, 46-len)) > 0;
- len += s);
- close(fd[0]);
- if (len == 46 && packname[45] == '\n' &&
- memcmp(packname, "keep\t", 5) == 0) {
- char path[PATH_MAX];
- packname[45] = 0;
- snprintf(path, sizeof(path), "%s/pack/pack-%s.keep",
- get_object_directory(), packname + 5);
- pack_lockfile = xstrdup(path);
- }
-
- /* Then wrap our index-pack process. */
- while (waitpid(pid, &status, 0) < 0)
- if (errno != EINTR)
- return "waitpid failed";
- if (WIFEXITED(status)) {
- int code = WEXITSTATUS(status);
- if (code)
- return "index-pack exited with error code";
- 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;
-}
-
-int main(int argc, char **argv)
-{
- int i;
- char *dir = NULL;
-
- argv++;
- for (i = 1; i < argc; i++) {
- char *arg = *argv++;
-
- if (*arg == '-') {
- /* Do flag handling here */
- usage(receive_pack_usage);
- }
- if (dir)
- usage(receive_pack_usage);
- dir = arg;
- }
- if (!dir)
- usage(receive_pack_usage);
-
- if (!enter_repo(dir, 0))
- die("'%s': unable to chdir or not a git archive", dir);
-
- if (is_repository_shallow())
- die("attempt to push into a shallow repository");
-
- git_config(receive_pack_config);
-
- if (0 <= transfer_unpack_limit)
- unpack_limit = transfer_unpack_limit;
- else if (0 <= receive_unpack_limit)
- unpack_limit = receive_unpack_limit;
-
- write_head_info();
-
- /* EOF */
- packet_flush(1);
-
- read_head_info();
- if (commands) {
- const char *unpack_status = NULL;
-
- if (!delete_only(commands))
- unpack_status = unpack();
- if (!unpack_status)
- execute_commands();
- if (pack_lockfile)
- unlink(pack_lockfile);
- if (report_status)
- report(unpack_status);
- }
- return 0;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-25 07:12:20 +0000