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core: Add --print-metadata-key option for show 

Useful for tools to extract simple metadata.
This commit is contained in:
Colin Walters 2011-12-26 22:09:14 -05:00
parent 8854ec59be
commit 31ba50b809
1 changed files with 41 additions and 1 deletions
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42
src/ostree/ot-builtin-show.c
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@ -29,10 +29,12 @@
static gboolean print_compose;
static char* print_variant_type;
static char* print_metadata_key;
static GOptionEntry options[] = {
{ "print-compose", 0, 0, G_OPTION_ARG_NONE, &print_compose, "If given, show the branches which make up the given compose commit", NULL },
{ "print-variant-type", 0, 0, G_OPTION_ARG_STRING, &print_variant_type, "If given, argument should be a filename and it will be interpreted as this type", NULL },
{ "print-metadata-key", 0, 0, G_OPTION_ARG_STRING, &print_metadata_key, "Print string value of metadata key KEY for given commit", "KEY" },
{ NULL }
};
@ -191,6 +193,36 @@ do_print_compose (OstreeRepo *repo,
return ret;
}
static gboolean
do_print_metadata_key (OstreeRepo *repo,
const char *resolved_rev,
const char *key,
GError **error)
{
gboolean ret = FALSE;
GVariant *commit = NULL;
GVariant *metadata = NULL;
const char *value;
if (!ostree_repo_load_variant (repo, OSTREE_OBJECT_TYPE_COMMIT,
resolved_rev, &commit, error))
goto out;
/* PARSE OSTREE_SERIALIZED_COMMIT_VARIANT */
metadata = g_variant_get_child_value (commit, 1);
if (!g_variant_lookup (metadata, key, "&s", &value))
goto out;
g_print ("%s\n", value);
ret = TRUE;
out:
ot_clear_gvariant (&metadata);
ot_clear_gvariant (&commit);
return ret;
}
gboolean
ostree_builtin_show (int argc, char **argv, GFile *repo_path, GError **error)
{
@ -217,7 +249,15 @@ ostree_builtin_show (int argc, char **argv, GFile *repo_path, GError **error)
}
rev = argv[1];
if (print_compose)
if (print_metadata_key)
{
if (!ostree_repo_resolve_rev (repo, rev, FALSE, &resolved_rev, error))
goto out;
if (!do_print_metadata_key (repo, resolved_rev, print_metadata_key, error))
goto out;
}
else if (print_compose)
{
if (!ostree_repo_resolve_rev (repo, rev, FALSE, &resolved_rev, error))
goto out;