Add custom memory allocator to MinGW and MacOS builds
[gitweb.git] / git.c
diff --git a/git.c b/git.c
index 940a498962ceb06a1dba85547d61ad62bb81a499..7d7f949f0da85ea124f67ead6f68fdd0ddc75d20 100644 (file)
--- a/git.c
+++ b/git.c
@@ -2,9 +2,10 @@
 #include "exec_cmd.h"
 #include "cache.h"
 #include "quote.h"
+#include "run-command.h"
 
 const char git_usage_string[] =
-       "git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate|--no-pager] [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE] [--help] COMMAND [ARGS]";
+       "git [--version] [--exec-path[=GIT_EXEC_PATH]] [--html-path] [-p|--paginate|--no-pager] [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE] [--help] COMMAND [ARGS]";
 
 const char git_more_info_string[] =
        "See 'git help COMMAND' for more information on a specific command.";
@@ -46,7 +47,7 @@ static void commit_pager_choice(void) {
        }
 }
 
-static int handle_options(const char*** argv, int* argc, int* envchanged)
+static int handle_options(const char ***argv, int *argc, int *envchanged)
 {
        int handled = 0;
 
@@ -74,6 +75,9 @@ static int handle_options(const char*** argv, int* argc, int* envchanged)
                                puts(git_exec_path());
                                exit(0);
                        }
+               } else if (!strcmp(cmd, "--html-path")) {
+                       puts(system_path(GIT_HTML_PATH));
+                       exit(0);
                } else if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
                        use_pager = 1;
                } else if (!strcmp(cmd, "--no-pager")) {
@@ -132,7 +136,7 @@ static int handle_alias(int *argcp, const char ***argv)
        int envchanged = 0, ret = 0, saved_errno = errno;
        const char *subdir;
        int count, option_count;
-       const char** new_argv;
+       const char **new_argv;
        const char *alias_command;
        char *alias_string;
        int unused_nongit;
@@ -158,7 +162,7 @@ static int handle_alias(int *argcp, const char ***argv)
                        if (ret >= 0 && WIFEXITED(ret) &&
                            WEXITSTATUS(ret) != 127)
                                exit(WEXITSTATUS(ret));
-                       die("Failed to run '%s' when expanding alias '%s'\n",
+                       die("Failed to run '%s' when expanding alias '%s'",
                            alias_string + 1, alias_command);
                }
                count = split_cmdline(alias_string, &new_argv);
@@ -183,10 +187,10 @@ static int handle_alias(int *argcp, const char ***argv)
                                  "trace: alias expansion: %s =>",
                                  alias_command);
 
-               new_argv = xrealloc(new_argv, sizeof(char*) *
+               new_argv = xrealloc(new_argv, sizeof(char *) *
                                    (count + *argcp + 1));
                /* insert after command name */
-               memcpy(new_argv + count, *argv + 1, sizeof(char*) * *argcp);
+               memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
                new_argv[count+*argcp] = NULL;
 
                *argv = new_argv;
@@ -219,7 +223,7 @@ struct cmd_struct {
        int option;
 };
 
-static int run_command(struct cmd_struct *p, int argc, const char **argv)
+static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
 {
        int status;
        struct stat st;
@@ -270,6 +274,7 @@ static void handle_internal_command(int argc, const char **argv)
                { "annotate", cmd_annotate, RUN_SETUP },
                { "apply", cmd_apply },
                { "archive", cmd_archive },
+               { "bisect--helper", cmd_bisect__helper, RUN_SETUP | NEED_WORK_TREE },
                { "blame", cmd_blame, RUN_SETUP },
                { "branch", cmd_branch, RUN_SETUP },
                { "bundle", cmd_bundle },
@@ -322,6 +327,7 @@ static void handle_internal_command(int argc, const char **argv)
                { "merge-ours", cmd_merge_ours, RUN_SETUP },
                { "merge-recursive", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
                { "merge-subtree", cmd_merge_recursive, RUN_SETUP | NEED_WORK_TREE },
+               { "mktree", cmd_mktree, RUN_SETUP },
                { "mv", cmd_mv, RUN_SETUP | NEED_WORK_TREE },
                { "name-rev", cmd_name_rev, RUN_SETUP },
                { "pack-objects", cmd_pack_objects, RUN_SETUP },
@@ -384,7 +390,7 @@ static void handle_internal_command(int argc, const char **argv)
                struct cmd_struct *p = commands+i;
                if (strcmp(p->cmd, cmd))
                        continue;
-               exit(run_command(p, argc, argv));
+               exit(run_builtin(p, argc, argv));
        }
 }
 
@@ -392,6 +398,7 @@ static void execv_dashed_external(const char **argv)
 {
        struct strbuf cmd = STRBUF_INIT;
        const char *tmp;
+       int status;
 
        strbuf_addf(&cmd, "git-%s", argv[0]);
 
@@ -406,37 +413,55 @@ static void execv_dashed_external(const char **argv)
 
        trace_argv_printf(argv, "trace: exec:");
 
-       /* execvp() can only ever return if it fails */
-       execvp(cmd.buf, (char **)argv);
-
-       trace_printf("trace: exec failed: %s\n", strerror(errno));
+       /*
+        * if we fail because the command is not found, it is
+        * OK to return. Otherwise, we just pass along the status code.
+        */
+       status = run_command_v_opt(argv, 0);
+       if (status != -ERR_RUN_COMMAND_EXEC) {
+               if (IS_RUN_COMMAND_ERR(status))
+                       die("unable to run '%s'", argv[0]);
+               exit(-status);
+       }
+       errno = ENOENT; /* as if we called execvp */
 
        argv[0] = tmp;
 
        strbuf_release(&cmd);
 }
 
-
-int main(int argc, const char **argv)
+static int run_argv(int *argcp, const char ***argv)
 {
-       const char *cmd = argv[0] && *argv[0] ? argv[0] : "git-help";
-       char *slash = (char *)cmd + strlen(cmd);
        int done_alias = 0;
 
-       /*
-        * Take the basename of argv[0] as the command
-        * name, and the dirname as the default exec_path
-        * if we don't have anything better.
-        */
-       do
-               --slash;
-       while (cmd <= slash && !is_dir_sep(*slash));
-       if (cmd <= slash) {
-               *slash++ = 0;
-               git_set_argv0_path(cmd);
-               cmd = slash;
+       while (1) {
+               /* See if it's an internal command */
+               handle_internal_command(*argcp, *argv);
+
+               /* .. then try the external ones */
+               execv_dashed_external(*argv);
+
+               /* It could be an alias -- this works around the insanity
+                * of overriding "git log" with "git show" by having
+                * alias.log = show
+                */
+               if (done_alias || !handle_alias(argcp, argv))
+                       break;
+               done_alias = 1;
        }
 
+       return done_alias;
+}
+
+
+int main(int argc, const char **argv)
+{
+       const char *cmd;
+
+       cmd = git_extract_argv0_path(argv[0]);
+       if (!cmd)
+               cmd = "git-help";
+
        /*
         * "git-xxxx" is the same as "git xxxx", but we obviously:
         *
@@ -473,38 +498,29 @@ int main(int argc, const char **argv)
 
        /*
         * We use PATH to find git commands, but we prepend some higher
-        * precidence paths: the "--exec-path" option, the GIT_EXEC_PATH
+        * precedence paths: the "--exec-path" option, the GIT_EXEC_PATH
         * environment, and the $(gitexecdir) from the Makefile at build
         * time.
         */
        setup_path();
 
        while (1) {
-               /* See if it's an internal command */
-               handle_internal_command(argc, argv);
-
-               /* .. then try the external ones */
-               execv_dashed_external(argv);
-
-               /* It could be an alias -- this works around the insanity
-                * of overriding "git log" with "git show" by having
-                * alias.log = show
-                */
-               if (done_alias || !handle_alias(&argc, &argv))
+               static int done_help = 0;
+               static int was_alias = 0;
+               was_alias = run_argv(&argc, &argv);
+               if (errno != ENOENT)
                        break;
-               done_alias = 1;
-       }
-
-       if (errno == ENOENT) {
-               if (done_alias) {
+               if (was_alias) {
                        fprintf(stderr, "Expansion of alias '%s' failed; "
                                "'%s' is not a git-command\n",
                                cmd, argv[0]);
                        exit(1);
                }
-               argv[0] = help_unknown_cmd(cmd);
-               handle_internal_command(argc, argv);
-               execv_dashed_external(argv);
+               if (!done_help) {
+                       cmd = argv[0] = help_unknown_cmd(cmd);
+                       done_help = 1;
+               } else
+                       break;
        }
 
        fprintf(stderr, "Failed to run command '%s': %s\n",