convert manual allocations to argv_array

There are many manual argv allocations that predate the
argv_array API. Switching to that API brings a few
advantages:

1. We no longer have to manually compute the correct final
array size (so it's one less thing we can screw up).

2. In many cases we had to make a separate pass to count,
then allocate, then fill in the array. Now we can do it
in one pass, making the code shorter and easier to
follow.

3. argv_array handles memory ownership for us, making it
more obvious when things should be free()d and and when
not.

Most of these cases are pretty straightforward. In some, we
switch from "run_command_v" to "run_command" which lets us
directly use the argv_array embedded in "struct
child_process".

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/grep.c b/builtin/grep.c
index 4229cae390ddddcc74f3506dc892ed02b45d7eae..95ddf96d1e416f59dff08a9dde71b04cdb2b6ccd 100644 (file)
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -354,17 +354,17 @@ static void append_path(struct grep_opt *opt, const void *data, size_t len)
 static void run_pager(struct grep_opt *opt, const char *prefix)
 {
        struct string_list *path_list = opt->output_priv;
-       const char **argv = xmalloc(sizeof(const char *) * (path_list->nr + 1));
+       struct child_process child = CHILD_PROCESS_INIT;
        int i, status;
 
        for (i = 0; i < path_list->nr; i++)
-               argv[i] = path_list->items[i].string;
-       argv[path_list->nr] = NULL;
+               argv_array_push(&child.args, path_list->items[i].string);
+       child.dir = prefix;
+       child.use_shell = 1;
 
-       status = run_command_v_opt_cd_env(argv, RUN_USING_SHELL, prefix, NULL);
+       status = run_command(&child);
        if (status)
                exit(status);
-       free(argv);
 }
 
 static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec, int cached)

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index f2d6761af66c8bcc43c2da13f69fa083cf1e1e60..932afab9312ecdf12a6edcf8e649835a3006dc93 100644 (file)
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -1031,7 +1031,6 @@ static void run_update_post_hook(struct command *commands)
 {
        struct command *cmd;
        int argc;
-       const char **argv;
        struct child_process proc = CHILD_PROCESS_INIT;
        const char *hook;
 
@@ -1044,21 +1043,16 @@ static void run_update_post_hook(struct command *commands)
        if (!argc || !hook)
                return;
 
-       argv = xmalloc(sizeof(*argv) * (2 + argc));
-       argv[0] = hook;
-
-       for (argc = 1, cmd = commands; cmd; cmd = cmd->next) {
+       argv_array_push(&proc.args, hook);
+       for (cmd = commands; cmd; cmd = cmd->next) {
                if (cmd->error_string || cmd->did_not_exist)
                        continue;
-               argv[argc] = xstrdup(cmd->ref_name);
-               argc++;
+               argv_array_push(&proc.args, cmd->ref_name);
        }
-       argv[argc] = NULL;
 
        proc.no_stdin = 1;
        proc.stdout_to_stderr = 1;
        proc.err = use_sideband ? -1 : 0;
-       proc.argv = argv;
 
        if (!start_command(&proc)) {
                if (use_sideband)

diff --git a/builtin/remote-ext.c b/builtin/remote-ext.c
index e3cd25d580b0f1ee14b4a5037ceae8dc20b31f30..7457c743e8d8539c4f08df81f86c8b27c0bce392 100644 (file)
--- a/builtin/remote-ext.c
+++ b/builtin/remote-ext.c
@@ -114,30 +114,14 @@ static char *strip_escapes(const char *str, const char *service,
        }
 }
 
-/* Should be enough... */
-#define MAXARGUMENTS 256
-
-static const char **parse_argv(const char *arg, const char *service)
+static void parse_argv(struct argv_array *out, const char *arg, const char *service)
 {
-       int arguments = 0;
-       int i;
-       const char **ret;
-       char *temparray[MAXARGUMENTS + 1];
-
        while (*arg) {
-               char *expanded;
-               if (arguments == MAXARGUMENTS)
-                       die("remote-ext command has too many arguments");
-               expanded = strip_escapes(arg, service, &arg);
+               char *expanded = strip_escapes(arg, service, &arg);
                if (expanded)
-                       temparray[arguments++] = expanded;
+                       argv_array_push(out, expanded);
+               free(expanded);
        }
-
-       ret = xmalloc((arguments + 1) * sizeof(char *));
-       for (i = 0; i < arguments; i++)
-               ret[i] = temparray[i];
-       ret[arguments] = NULL;
-       return ret;
 }
 
 static void send_git_request(int stdin_fd, const char *serv, const char *repo,
@@ -158,7 +142,7 @@ static int run_child(const char *arg, const char *service)
        child.in = -1;
        child.out = -1;
        child.err = 0;
-       child.argv = parse_argv(arg, service);
+       parse_argv(&child.args, arg, service);
 
        if (start_command(&child) < 0)
                die("Can't run specified command");

diff --git a/daemon.c b/daemon.c
index be70cd4da09ccab8850be41e19b0fc4b9a10f502..1e258ac8f9cebf135aa7ac07389f3ae4a49842ff 100644 (file)
--- a/daemon.c
+++ b/daemon.c
@@ -808,7 +808,7 @@ static void check_dead_children(void)
                        cradle = &blanket->next;
 }
 
-static char **cld_argv;
+static struct argv_array cld_argv = ARGV_ARRAY_INIT;
 static void handle(int incoming, struct sockaddr *addr, socklen_t addrlen)
 {
        struct child_process cld = CHILD_PROCESS_INIT;
@@ -842,7 +842,7 @@ static void handle(int incoming, struct sockaddr *addr, socklen_t addrlen)
 #endif
        }
 
-       cld.argv = (const char **)cld_argv;
+       cld.argv = cld_argv.argv;
        cld.in = incoming;
        cld.out = dup(incoming);
 
@@ -1374,12 +1374,10 @@ int main(int argc, char **argv)
                write_file(pid_file, "%"PRIuMAX, (uintmax_t) getpid());
 
        /* prepare argv for serving-processes */
-       cld_argv = xmalloc(sizeof (char *) * (argc + 2));
-       cld_argv[0] = argv[0];  /* git-daemon */
-       cld_argv[1] = "--serve";
+       argv_array_push(&cld_argv, argv[0]); /* git-daemon */
+       argv_array_push(&cld_argv, "--serve");
        for (i = 1; i < argc; ++i)
-               cld_argv[i+1] = argv[i];
-       cld_argv[argc+1] = NULL;
+               argv_array_push(&cld_argv, argv[i]);
 
        return serve(&listen_addr, listen_port, cred);
 }

diff --git a/git.c b/git.c
index 6ed824cacfccddcb01104835b45ab934ff3f443e..e61a59c0145af8d24575e11d38ff91910b2cae8a 100644 (file)
--- a/git.c
+++ b/git.c
@@ -239,19 +239,15 @@ static int handle_alias(int *argcp, const char ***argv)
        alias_string = alias_lookup(alias_command);
        if (alias_string) {
                if (alias_string[0] == '!') {
-                       const char **alias_argv;
-                       int argc = *argcp, i;
+                       struct child_process child = CHILD_PROCESS_INIT;
 
                        commit_pager_choice();
 
-                       /* build alias_argv */
-                       alias_argv = xmalloc(sizeof(*alias_argv) * (argc + 1));
-                       alias_argv[0] = alias_string + 1;
-                       for (i = 1; i < argc; ++i)
-                               alias_argv[i] = (*argv)[i];
-                       alias_argv[argc] = NULL;
+                       child.use_shell = 1;
+                       argv_array_push(&child.args, alias_string + 1);
+                       argv_array_pushv(&child.args, (*argv) + 1);
 
-                       ret = run_command_v_opt(alias_argv, RUN_USING_SHELL);
+                       ret = run_command(&child);
                        if (ret >= 0)   /* normal exit */
                                exit(ret);
 

diff --git a/line-log.c b/line-log.c
index af6e2f799ec7e2447ee888854442a7cbfe7644e4..5877986c5a683684997e96b35409e0d8c619fa05 100644 (file)
--- a/line-log.c
+++ b/line-log.c
@@ -14,6 +14,7 @@
 #include "graph.h"
 #include "userdiff.h"
 #include "line-log.h"
+#include "argv-array.h"
 
 static void range_set_grow(struct range_set *rs, size_t extra)
 {
@@ -746,22 +747,17 @@ void line_log_init(struct rev_info *rev, const char *prefix, struct string_list
        add_line_range(rev, commit, range);
 
        if (!rev->diffopt.detect_rename) {
-               int i, count = 0;
-               struct line_log_data *r = range;
+               struct line_log_data *r;
+               struct argv_array array = ARGV_ARRAY_INIT;
                const char **paths;
-               while (r) {
-                       count++;
-                       r = r->next;
-               }
-               paths = xmalloc((count+1)*sizeof(char *));
-               r = range;
-               for (i = 0; i < count; i++) {
-                       paths[i] = xstrdup(r->path);
-                       r = r->next;
-               }
-               paths[count] = NULL;
+
+               for (r = range; r; r = r->next)
+                       argv_array_push(&array, r->path);
+               paths = argv_array_detach(&array);
+
                parse_pathspec(&rev->diffopt.pathspec, 0,
                               PATHSPEC_PREFER_FULL, "", paths);
+               /* strings are now owned by pathspec */
                free(paths);
        }
 }

diff --git a/remote-curl.c b/remote-curl.c
index f404faf0f4b9ec298ccbae34fae0c79283884d26..e81b9d560b2508c08b877d18f6cfbfddb504e9a2 100644 (file)
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -845,23 +845,22 @@ static void parse_fetch(struct strbuf *buf)
 
 static int push_dav(int nr_spec, char **specs)
 {
-       const char **argv = xmalloc((10 + nr_spec) * sizeof(char*));
-       int argc = 0, i;
+       struct child_process child = CHILD_PROCESS_INIT;
+       size_t i;
 
-       argv[argc++] = "http-push";
-       argv[argc++] = "--helper-status";
+       child.git_cmd = 1;
+       argv_array_push(&child.args, "http-push");
+       argv_array_push(&child.args, "--helper-status");
        if (options.dry_run)
-               argv[argc++] = "--dry-run";
+               argv_array_push(&child.args, "--dry-run");
        if (options.verbosity > 1)
-               argv[argc++] = "--verbose";
-       argv[argc++] = url.buf;
+               argv_array_push(&child.args, "--verbose");
+       argv_array_push(&child.args, url.buf);
        for (i = 0; i < nr_spec; i++)
-               argv[argc++] = specs[i];
-       argv[argc++] = NULL;
+               argv_array_push(&child.args, specs[i]);
 
-       if (run_command_v_opt(argv, RUN_GIT_CMD))
-               die("git-%s failed", argv[0]);
-       free(argv);
+       if (run_command(&child))
+               die("git-http-push failed");
        return 0;
 }