gitweb: Incremental blame (using JavaScript)

diff --git a/git.c b/git.c
index ecc8fad09aebd16410f2736458d60e04f9dfb296..807d875ae06ce7bbf61bb846c5b4cb5a51855eba 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;
@@ -183,11 +187,10 @@ static int handle_alias(int *argcp, const char ***argv)
                                  "trace: alias expansion: %s =>",
                                  alias_command);
 
-               new_argv = xrealloc(new_argv, sizeof(char*) *
-                                   (count + *argcp + 1));
+               new_argv = xrealloc(new_argv, sizeof(char *) *
+                                   (count + *argcp));
                /* insert after command name */
-               memcpy(new_argv + count, *argv + 1, sizeof(char*) * *argcp);
-               new_argv[count+*argcp] = NULL;
+               memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);
 
                *argv = new_argv;
                *argcp += count - 1;
@@ -196,7 +199,7 @@ static int handle_alias(int *argcp, const char ***argv)
        }
 
        if (subdir && chdir(subdir))
-               die("Cannot change to %s: %s", subdir, strerror(errno));
+               die_errno("Cannot change to '%s'", subdir);
 
        errno = saved_errno;
 
@@ -219,7 +222,7 @@ 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;
@@ -242,7 +245,7 @@ static int run_command(struct cmd_struct *p, int argc, const char **argv)
 
        status = p->fn(argc, argv, prefix);
        if (status)
-               return status & 0xff;
+               return status;
 
        /* Somebody closed stdout? */
        if (fstat(fileno(stdout), &st))
@@ -253,11 +256,11 @@ static int run_command(struct cmd_struct *p, int argc, const char **argv)
 
        /* Check for ENOSPC and EIO errors.. */
        if (fflush(stdout))
-               die("write failure on standard output: %s", strerror(errno));
+               die_errno("write failure on standard output");
        if (ferror(stdout))
                die("unknown write failure on standard output");
        if (fclose(stdout))
-               die("close failed on standard output: %s", strerror(errno));
+               die_errno("close failed on standard output");
        return 0;
 }
 
@@ -270,6 +273,7 @@ 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 +326,7 @@ 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 +389,7 @@ 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 +397,7 @@ 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]);
 
@@ -406,10 +412,17 @@ 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;
 
@@ -442,21 +455,11 @@ static int run_argv(int *argcp, const char ***argv)
 
 int main(int argc, const char **argv)
 {
-       const char *cmd = argv[0] && *argv[0] ? argv[0] : "git-help";
-       char *slash = (char *)cmd + strlen(cmd);
+       const char *cmd;
 
-       /*
-        * 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.
-        */
-       while (cmd <= slash && !is_dir_sep(*slash))
-               slash--;
-       if (cmd <= slash) {
-               *slash++ = 0;
-               git_set_argv0_path(cmd);
-               cmd = slash;
-       }
+       cmd = git_extract_argv0_path(argv[0]);
+       if (!cmd)
+               cmd = "git-help";
 
        /*
         * "git-xxxx" is the same as "git xxxx", but we obviously:
@@ -494,7 +497,7 @@ 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.
         */