[PATCH 2/2] fetch: use argv_array instead of hand-building arrays
- From
Jeff King <peff@peff.net>
- Date
- Sep 1, 2012, 11:27 UTC
- Message-ID
- <20120901112735.GB19163@sigill.intra.peff.net>
- In-Reply-To
- <20120901112251.GA11445@sigill.intra.peff.net>
Fetch invokes itself recursively when recursing into submodules or handling "fetch --multiple". In both cases, it builds the child's command line by pushing options onto a statically-sized array. In both cases, the array is currently just big enough to handle the largest possible case. However, this technique is brittle and error-prone, so let's replace it with a dynamic argv_array.
Signed-off-by: Jeff King <peff@peff.net> --- Not very well tested by me, but hopefully it is simple enough that I managed not to screw it up.
It may be that fetch_populated_submodules would also benefit from conversion (here I just pass in the argc and argv separately), but I didn't look.
builtin/fetch.c | 47 +++++++++++++++++++++++++---------------------- 1 file changed, 25 insertions(+), 22 deletions(-)
diff --git a/builtin/fetch.c b/builtin/fetch.c index bb9a074..b6a8be0 100644 --- a/builtin/fetch.c +++ b/builtin/fetch.c @@ -14,6 +14,7 @@ #include "transport.h" #include "submodule.h" #include "connected.h" +#include "argv-array.h" static const char * const builtin_fetch_usage[] = { "git fetch [<options>] [<repository> [<refspec>...]]", @@ -841,38 +842,35 @@ static int fetch_multiple(struct string_list *list) return 1; } -static void add_options_to_argv(int *argc, const char **argv) +static void add_options_to_argv(struct argv_array *argv) { if (dry_run) - argv[(*argc)++] = "--dry-run"; + argv_array_push(argv, "--dry-run"); if (prune) - argv[(*argc)++] = "--prune"; + argv_array_push(argv, "--prune"); if (update_head_ok) - argv[(*argc)++] = "--update-head-ok"; + argv_array_push(argv, "--update-head-ok"); if (force) - argv[(*argc)++] = "--force"; + argv_array_push(argv, "--force"); if (keep) - argv[(*argc)++] = "--keep"; + argv_array_push(argv, "--keep"); if (recurse_submodules == RECURSE_SUBMODULES_ON) - argv[(*argc)++] = "--recurse-submodules"; + argv_array_push(argv, "--recurse-submodules"); else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) - argv[(*argc)++] = "--recurse-submodules=on-demand"; + argv_array_push(argv, "--recurse-submodules=on-demand"); if (verbosity >= 2) - argv[(*argc)++] = "-v"; + argv_array_push(argv, "-v"); if (verbosity >= 1) - argv[(*argc)++] = "-v"; + argv_array_push(argv, "-v"); else if (verbosity < 0) - argv[(*argc)++] = "-q"; + argv_array_push(argv, "-q"); } static int fetch_multiple(struct string_list *list) { int i, result = 0; - const char *argv[12] = { "fetch", "--append" }; - int argc = 2; - - add_options_to_argv(&argc, argv); + struct argv_array argv = ARGV_ARRAY_INIT; if (!append && !dry_run) { int errcode = truncate_fetch_head(); @@ -880,18 +878,22 @@ static int fetch_multiple(struct string_list *list) return errcode; } + argv_array_pushl(&argv, "fetch", "--append", NULL); + add_options_to_argv(&argv); + for (i = 0; i < list->nr; i++) { const char *name = list->items[i].string; - argv[argc] = name; - argv[argc + 1] = NULL; + argv_array_push(&argv, name); if (verbosity >= 0) printf(_("Fetching %s\n"), name); - if (run_command_v_opt(argv, RUN_GIT_CMD)) { + if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) { error(_("Could not fetch %s"), name); result = 1; } + argv_array_pop(&argv); } + argv_array_clear(&argv); return result; } @@ -1007,13 +1009,14 @@ int cmd_fetch(int argc, const char **argv, const char *prefix) } if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) { - const char *options[10]; - int num_options = 0; - add_options_to_argv(&num_options, options); - result = fetch_populated_submodules(num_options, options, + struct argv_array options = ARGV_ARRAY_INIT; + + add_options_to_argv(&options); + result = fetch_populated_submodules(options.argc, options.argv, submodule_prefix, recurse_submodules, verbosity < 0); + argv_array_clear(&options); } /* All names were strdup()ed or strndup()ed */
-- 1.7.12.rc3.8.g89db099