fast-import: add a get-mark command

diff --git a/git.c b/git.c
index 84310e30ee7f33209ea1d9cc80e3aa010abd5c64..42a4ee57843f569fb754121f01bb8c46feee2fd3 100644 (file)
--- a/git.c
+++ b/git.c
@@ -1,26 +1,23 @@
 #include "builtin.h"
-#include "cache.h"
 #include "exec_cmd.h"
 #include "help.h"
-#include "quote.h"
 #include "run-command.h"
-#include "commit.h"
 
 const char git_usage_string[] =
        "git [--version] [--help] [-C <path>] [-c name=value]\n"
        "           [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n"
-       "           [-p|--paginate|--no-pager] [--no-replace-objects] [--bare]\n"
+       "           [-p | --paginate | --no-pager] [--no-replace-objects] [--bare]\n"
        "           [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n"
        "           <command> [<args>]";
 
 const char git_more_info_string[] =
-       N_("'git help -a' and 'git help -g' lists available subcommands and some\n"
+       N_("'git help -a' and 'git help -g' list available subcommands and some\n"
           "concept guides. See 'git help <command>' or 'git help <concept>'\n"
           "to read about a specific subcommand or concept.");
 
 static struct startup_info git_startup_info;
 static int use_pager = -1;
-static char orig_cwd[PATH_MAX];
+static char *orig_cwd;
 static const char *env_names[] = {
        GIT_DIR_ENVIRONMENT,
        GIT_WORK_TREE_ENVIRONMENT,
@@ -36,8 +33,7 @@ static void save_env(void)
        if (saved_environment)
                return;
        saved_environment = 1;
-       if (!getcwd(orig_cwd, sizeof(orig_cwd)))
-               die_errno("cannot getcwd");
+       orig_cwd = xgetcwd();
        for (i = 0; i < ARRAY_SIZE(env_names); i++) {
                orig_env[i] = getenv(env_names[i]);
                if (orig_env[i])
@@ -48,8 +44,9 @@ static void save_env(void)
 static void restore_env(void)
 {
        int i;
-       if (*orig_cwd && chdir(orig_cwd))
+       if (orig_cwd && chdir(orig_cwd))
                die_errno("could not move to %s", orig_cwd);
+       free(orig_cwd);
        for (i = 0; i < ARRAY_SIZE(env_names); i++) {
                if (orig_env[i])
                        setenv(env_names[i], orig_env[i], 1);
@@ -161,9 +158,10 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
                        if (envchanged)
                                *envchanged = 1;
                } else if (!strcmp(cmd, "--bare")) {
-                       static char git_dir[PATH_MAX+1];
+                       char *cwd = xgetcwd();
                        is_bare_repository_cfg = 1;
-                       setenv(GIT_DIR_ENVIRONMENT, getcwd(git_dir, sizeof(git_dir)), 0);
+                       setenv(GIT_DIR_ENVIRONMENT, cwd, 0);
+                       free(cwd);
                        setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
                        if (envchanged)
                                *envchanged = 1;
@@ -206,10 +204,12 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
                                fprintf(stderr, "No directory given for -C.\n" );
                                usage(git_usage_string);
                        }
-                       if (chdir((*argv)[1]))
-                               die_errno("Cannot change to '%s'", (*argv)[1]);
-                       if (envchanged)
-                               *envchanged = 1;
+                       if ((*argv)[1][0]) {
+                               if (chdir((*argv)[1]))
+                                       die_errno("Cannot change to '%s'", (*argv)[1]);
+                               if (envchanged)
+                                       *envchanged = 1;
+                       }
                        (*argv)++;
                        (*argc)--;
                } else {
@@ -281,8 +281,7 @@ static int handle_alias(int *argcp, const char ***argv)
                                  "trace: alias expansion: %s =>",
                                  alias_command);
 
-               new_argv = xrealloc(new_argv, sizeof(char *) *
-                                   (count + *argcp));
+               REALLOC_ARRAY(new_argv, count + *argcp);
                /* insert after command name */
                memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
 
@@ -417,6 +416,7 @@ static struct cmd_struct commands[] = {
        { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY },
        { "init", cmd_init_db, NO_SETUP },
        { "init-db", cmd_init_db, NO_SETUP },
+       { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP },
        { "log", cmd_log, RUN_SETUP },
        { "ls-files", cmd_ls_files, RUN_SETUP },
        { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
@@ -595,11 +595,32 @@ static int run_argv(int *argcp, const char ***argv)
        return done_alias;
 }
 
+/*
+ * Many parts of Git have subprograms communicate via pipe, expect the
+ * upstream of a pipe to die with SIGPIPE when the downstream of a
+ * pipe does not need to read all that is written.  Some third-party
+ * programs that ignore or block SIGPIPE for their own reason forget
+ * to restore SIGPIPE handling to the default before spawning Git and
+ * break this carefully orchestrated machinery.
+ *
+ * Restore the way SIGPIPE is handled to default, which is what we
+ * expect.
+ */
+static void restore_sigpipe_to_default(void)
+{
+       sigset_t unblock;
+
+       sigemptyset(&unblock);
+       sigaddset(&unblock, SIGPIPE);
+       sigprocmask(SIG_UNBLOCK, &unblock, NULL);
+       signal(SIGPIPE, SIG_DFL);
+}
 
 int main(int argc, char **av)
 {
        const char **argv = (const char **) av;
        const char *cmd;
+       int done_help = 0;
 
        startup_info = &git_startup_info;
 
@@ -614,6 +635,8 @@ int main(int argc, char **av)
         */
        sanitize_stdfds();
 
+       restore_sigpipe_to_default();
+
        git_setup_gettext();
 
        trace_command_performance(argv);
@@ -660,9 +683,7 @@ int main(int argc, char **av)
        setup_path();
 
        while (1) {
-               static int done_help = 0;
-               static int was_alias = 0;
-               was_alias = run_argv(&argc, &argv);
+               int was_alias = run_argv(&argc, &argv);
                if (errno != ENOENT)
                        break;
                if (was_alias) {