Imported Upstream version 2.17.1
[platform/upstream/git.git] / git.c
diff --git a/git.c b/git.c
index c8fe663..ceaa58e 100644 (file)
--- a/git.c
+++ b/git.c
@@ -1,14 +1,15 @@
 #include "builtin.h"
+#include "config.h"
 #include "exec_cmd.h"
 #include "help.h"
 #include "run-command.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"
-       "           [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n"
-       "           <command> [<args>]";
+       N_("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"
+          "           [--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' list available subcommands and some\n"
@@ -16,50 +17,8 @@ const char git_more_info_string[] =
           "to read about a specific subcommand or concept.");
 
 static int use_pager = -1;
-static char *orig_cwd;
-static const char *env_names[] = {
-       GIT_DIR_ENVIRONMENT,
-       GIT_WORK_TREE_ENVIRONMENT,
-       GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
-       GIT_PREFIX_ENVIRONMENT
-};
-static char *orig_env[4];
-static int save_restore_env_balance;
-
-static void save_env_before_alias(void)
-{
-       int i;
-
-       assert(save_restore_env_balance == 0);
-       save_restore_env_balance = 1;
-       orig_cwd = xgetcwd();
-       for (i = 0; i < ARRAY_SIZE(env_names); i++) {
-               orig_env[i] = getenv(env_names[i]);
-               orig_env[i] = xstrdup_or_null(orig_env[i]);
-       }
-}
-
-static void restore_env(int external_alias)
-{
-       int i;
 
-       assert(save_restore_env_balance == 1);
-       save_restore_env_balance = 0;
-       if (!external_alias && 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 (external_alias &&
-                   !strcmp(env_names[i], GIT_PREFIX_ENVIRONMENT))
-                       continue;
-               if (orig_env[i]) {
-                       setenv(env_names[i], orig_env[i], 1);
-                       free(orig_env[i]);
-               } else {
-                       unsetenv(env_names[i]);
-               }
-       }
-}
+static void list_builtins(void);
 
 static void commit_pager_choice(void) {
        switch (use_pager) {
@@ -74,6 +33,16 @@ static void commit_pager_choice(void) {
        }
 }
 
+void setup_auto_pager(const char *cmd, int def)
+{
+       if (use_pager != -1 || pager_in_use())
+               return;
+       use_pager = check_pager_config(cmd);
+       if (use_pager == -1)
+               use_pager = def;
+       commit_pager_choice();
+}
+
 static int handle_options(const char ***argv, int *argc, int *envchanged)
 {
        const char **orig_argv = *argv;
@@ -123,7 +92,7 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
                                *envchanged = 1;
                } else if (!strcmp(cmd, "--git-dir")) {
                        if (*argc < 2) {
-                               fprintf(stderr, "No directory given for --git-dir.\n" );
+                               fprintf(stderr, _("no directory given for --git-dir\n" ));
                                usage(git_usage_string);
                        }
                        setenv(GIT_DIR_ENVIRONMENT, (*argv)[1], 1);
@@ -137,7 +106,7 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
                                *envchanged = 1;
                } else if (!strcmp(cmd, "--namespace")) {
                        if (*argc < 2) {
-                               fprintf(stderr, "No namespace given for --namespace.\n" );
+                               fprintf(stderr, _("no namespace given for --namespace\n" ));
                                usage(git_usage_string);
                        }
                        setenv(GIT_NAMESPACE_ENVIRONMENT, (*argv)[1], 1);
@@ -151,7 +120,7 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
                                *envchanged = 1;
                } else if (!strcmp(cmd, "--work-tree")) {
                        if (*argc < 2) {
-                               fprintf(stderr, "No directory given for --work-tree.\n" );
+                               fprintf(stderr, _("no directory given for --work-tree\n" ));
                                usage(git_usage_string);
                        }
                        setenv(GIT_WORK_TREE_ENVIRONMENT, (*argv)[1], 1);
@@ -165,7 +134,7 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
                                *envchanged = 1;
                } else if (!strcmp(cmd, "--super-prefix")) {
                        if (*argc < 2) {
-                               fprintf(stderr, "No prefix given for --super-prefix.\n" );
+                               fprintf(stderr, _("no prefix given for --super-prefix\n" ));
                                usage(git_usage_string);
                        }
                        setenv(GIT_SUPER_PREFIX_ENVIRONMENT, (*argv)[1], 1);
@@ -187,7 +156,7 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
                                *envchanged = 1;
                } else if (!strcmp(cmd, "-c")) {
                        if (*argc < 2) {
-                               fprintf(stderr, "-c expects a configuration string\n" );
+                               fprintf(stderr, _("-c expects a configuration string\n" ));
                                usage(git_usage_string);
                        }
                        git_config_push_parameter((*argv)[1]);
@@ -213,6 +182,10 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
                        setenv(GIT_ICASE_PATHSPECS_ENVIRONMENT, "1", 1);
                        if (envchanged)
                                *envchanged = 1;
+               } else if (!strcmp(cmd, "--no-optional-locks")) {
+                       setenv(GIT_OPTIONAL_LOCKS_ENVIRONMENT, "0", 1);
+                       if (envchanged)
+                               *envchanged = 1;
                } else if (!strcmp(cmd, "--shallow-file")) {
                        (*argv)++;
                        (*argc)--;
@@ -221,19 +194,22 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
                                *envchanged = 1;
                } else if (!strcmp(cmd, "-C")) {
                        if (*argc < 2) {
-                               fprintf(stderr, "No directory given for -C.\n" );
+                               fprintf(stderr, _("no directory given for -C\n" ));
                                usage(git_usage_string);
                        }
                        if ((*argv)[1][0]) {
                                if (chdir((*argv)[1]))
-                                       die_errno("Cannot change to '%s'", (*argv)[1]);
+                                       die_errno("cannot change to '%s'", (*argv)[1]);
                                if (envchanged)
                                        *envchanged = 1;
                        }
                        (*argv)++;
                        (*argc)--;
+               } else if (!strcmp(cmd, "--list-builtins")) {
+                       list_builtins();
+                       exit(0);
                } else {
-                       fprintf(stderr, "Unknown option: %s\n", cmd);
+                       fprintf(stderr, _("unknown option: %s\n"), cmd);
                        usage(git_usage_string);
                }
 
@@ -250,19 +226,18 @@ static int handle_alias(int *argcp, const char ***argv)
        const char **new_argv;
        const char *alias_command;
        char *alias_string;
-       int unused_nongit;
-
-       save_env_before_alias();
-       setup_git_directory_gently(&unused_nongit);
 
        alias_command = (*argv)[0];
        alias_string = alias_lookup(alias_command);
        if (alias_string) {
                if (alias_string[0] == '!') {
                        struct child_process child = CHILD_PROCESS_INIT;
+                       int nongit_ok;
+
+                       /* Aliases expect GIT_PREFIX, GIT_DIR etc to be set */
+                       setup_git_directory_gently(&nongit_ok);
 
                        commit_pager_choice();
-                       restore_env(1);
 
                        child.use_shell = 1;
                        argv_array_push(&child.args, alias_string + 1);
@@ -272,7 +247,7 @@ static int handle_alias(int *argcp, const char ***argv)
                        if (ret >= 0)   /* normal exit */
                                exit(ret);
 
-                       die_errno("While expanding alias '%s': '%s'",
+                       die_errno("while expanding alias '%s': '%s'",
                            alias_command, alias_string + 1);
                }
                count = split_cmdline(alias_string, &new_argv);
@@ -281,8 +256,8 @@ static int handle_alias(int *argcp, const char ***argv)
                            split_cmdline_strerror(count));
                option_count = handle_options(&new_argv, &count, &envchanged);
                if (envchanged)
-                       die("alias '%s' changes environment variables\n"
-                                "You can use '!git' in the alias to do this.",
+                       die("alias '%s' changes environment variables.\n"
+                                "You can use '!git' in the alias to do this",
                                 alias_command);
                memmove(new_argv - option_count, new_argv,
                                count * sizeof(char *));
@@ -308,8 +283,6 @@ static int handle_alias(int *argcp, const char ***argv)
                ret = 1;
        }
 
-       restore_env(0);
-
        errno = saved_errno;
 
        return ret;
@@ -324,6 +297,7 @@ static int handle_alias(int *argcp, const char ***argv)
  */
 #define NEED_WORK_TREE         (1<<3)
 #define SUPPORT_SUPER_PREFIX   (1<<4)
+#define DELAY_PAGER_CONFIG     (1<<5)
 
 struct cmd_struct {
        const char *cmd;
@@ -347,7 +321,8 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
                        prefix = setup_git_directory_gently(&nongit_ok);
                }
 
-               if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY))
+               if (use_pager == -1 && p->option & (RUN_SETUP | RUN_SETUP_GENTLY) &&
+                   !(p->option & DELAY_PAGER_CONFIG))
                        use_pager = check_pager_config(p->cmd);
                if (use_pager == -1 && p->option & USE_PAGER)
                        use_pager = 1;
@@ -361,8 +336,6 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
        if (!help && get_super_prefix()) {
                if (!(p->option & SUPPORT_SUPER_PREFIX))
                        die("%s doesn't support --super-prefix", p->cmd);
-               if (prefix)
-                       die("can't use --super-prefix from a subdirectory");
        }
 
        if (!help && p->option & NEED_WORK_TREE)
@@ -399,7 +372,7 @@ static struct cmd_struct commands[] = {
        { "archive", cmd_archive, RUN_SETUP_GENTLY },
        { "bisect--helper", cmd_bisect__helper, RUN_SETUP },
        { "blame", cmd_blame, RUN_SETUP },
-       { "branch", cmd_branch, RUN_SETUP },
+       { "branch", cmd_branch, RUN_SETUP | DELAY_PAGER_CONFIG },
        { "bundle", cmd_bundle, RUN_SETUP_GENTLY },
        { "cat-file", cmd_cat_file, RUN_SETUP },
        { "check-attr", cmd_check_attr, RUN_SETUP },
@@ -416,7 +389,7 @@ static struct cmd_struct commands[] = {
        { "column", cmd_column, RUN_SETUP_GENTLY },
        { "commit", cmd_commit, RUN_SETUP | NEED_WORK_TREE },
        { "commit-tree", cmd_commit_tree, RUN_SETUP },
-       { "config", cmd_config, RUN_SETUP_GENTLY },
+       { "config", cmd_config, RUN_SETUP_GENTLY | DELAY_PAGER_CONFIG },
        { "count-objects", cmd_count_objects, RUN_SETUP },
        { "credential", cmd_credential, RUN_SETUP_GENTLY },
        { "describe", cmd_describe, RUN_SETUP },
@@ -424,6 +397,7 @@ static struct cmd_struct commands[] = {
        { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE },
        { "diff-index", cmd_diff_index, RUN_SETUP },
        { "diff-tree", cmd_diff_tree, RUN_SETUP },
+       { "difftool", cmd_difftool, RUN_SETUP | NEED_WORK_TREE },
        { "fast-export", cmd_fast_export, RUN_SETUP },
        { "fetch", cmd_fetch, RUN_SETUP },
        { "fetch-pack", cmd_fetch_pack, RUN_SETUP },
@@ -442,7 +416,7 @@ static struct cmd_struct commands[] = {
        { "init-db", cmd_init_db },
        { "interpret-trailers", cmd_interpret_trailers, RUN_SETUP_GENTLY },
        { "log", cmd_log, RUN_SETUP },
-       { "ls-files", cmd_ls_files, RUN_SETUP | SUPPORT_SUPER_PREFIX },
+       { "ls-files", cmd_ls_files, RUN_SETUP },
        { "ls-remote", cmd_ls_remote, RUN_SETUP_GENTLY },
        { "ls-tree", cmd_ls_tree, RUN_SETUP },
        { "mailinfo", cmd_mailinfo, RUN_SETUP_GENTLY },
@@ -471,7 +445,8 @@ static struct cmd_struct commands[] = {
        { "prune-packed", cmd_prune_packed, RUN_SETUP },
        { "pull", cmd_pull, RUN_SETUP | NEED_WORK_TREE },
        { "push", cmd_push, RUN_SETUP },
-       { "read-tree", cmd_read_tree, RUN_SETUP },
+       { "read-tree", cmd_read_tree, RUN_SETUP | SUPPORT_SUPER_PREFIX},
+       { "rebase--helper", cmd_rebase__helper, RUN_SETUP | NEED_WORK_TREE },
        { "receive-pack", cmd_receive_pack },
        { "reflog", cmd_reflog, RUN_SETUP },
        { "remote", cmd_remote, RUN_SETUP },
@@ -493,9 +468,9 @@ static struct cmd_struct commands[] = {
        { "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
        { "status", cmd_status, RUN_SETUP | NEED_WORK_TREE },
        { "stripspace", cmd_stripspace },
-       { "submodule--helper", cmd_submodule__helper, RUN_SETUP },
+       { "submodule--helper", cmd_submodule__helper, RUN_SETUP | SUPPORT_SUPER_PREFIX},
        { "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
-       { "tag", cmd_tag, RUN_SETUP },
+       { "tag", cmd_tag, RUN_SETUP | DELAY_PAGER_CONFIG },
        { "unpack-file", cmd_unpack_file, RUN_SETUP },
        { "unpack-objects", cmd_unpack_objects, RUN_SETUP },
        { "update-index", cmd_update_index, RUN_SETUP },
@@ -529,6 +504,13 @@ int is_builtin(const char *s)
        return !!get_builtin(s);
 }
 
+static void list_builtins(void)
+{
+       int i;
+       for (i = 0; i < ARRAY_SIZE(commands); i++)
+               printf("%s\n", commands[i].cmd);
+}
+
 #ifdef STRIP_EXTENSION
 static void strip_extension(const char **argv)
 {
@@ -581,7 +563,7 @@ static void execv_dashed_external(const char **argv)
        if (get_super_prefix())
                die("%s doesn't support --super-prefix", argv[0]);
 
-       if (use_pager == -1)
+       if (use_pager == -1 && !is_builtin(argv[0]))
                use_pager = check_pager_config(argv[0]);
        commit_pager_choice();
 
@@ -702,8 +684,8 @@ int cmd_main(int argc, const char **argv)
                if (errno != ENOENT)
                        break;
                if (was_alias) {
-                       fprintf(stderr, "Expansion of alias '%s' failed; "
-                               "'%s' is not a git command\n",
+                       fprintf(stderr, _("expansion of alias '%s' failed; "
+                                         "'%s' is not a git command\n"),
                                cmd, argv[0]);
                        exit(1);
                }
@@ -714,7 +696,7 @@ int cmd_main(int argc, const char **argv)
                        break;
        }
 
-       fprintf(stderr, "Failed to run command '%s': %s\n",
+       fprintf(stderr, _("failed to run command '%s': %s\n"),
                cmd, strerror(errno));
 
        return 1;