[Libosinfo] [osinfo-db-tools PATCH 1/1] import: Introduce "--latest" option
Fabiano Fidêncio
fidencio at redhat.com
Tue Oct 9 14:34:58 UTC 2018
--latest option checks whether there's a new osinfo-db available from
the official libosinfo's release website, downloads and install it.
The download and installation is only then when the version available in
libosinfo's release website is newer than the version installed in the
(specified location in) system.
Signed-off-by: Fabiano Fidêncio <fidencio at redhat.com>
---
tools/osinfo-db-import.c | 155 +++++++++++++++++++++++++++++++++++++++
1 file changed, 155 insertions(+)
diff --git a/tools/osinfo-db-import.c b/tools/osinfo-db-import.c
index c0b4931..79a0031 100644
--- a/tools/osinfo-db-import.c
+++ b/tools/osinfo-db-import.c
@@ -31,6 +31,9 @@
#include "osinfo-db-util.h"
+#define LATEST_URI "https://fidencio.fedorapeople.org/osinfo-db-latest.txt"
+#define VERSION_FILE "VERSION"
+
const char *argv0;
static int osinfo_db_import_create_reg(GFile *file,
@@ -184,6 +187,127 @@ osinfo_db_import_download_file(const gchar *url,
return ret;
}
+static gboolean osinfo_db_get_installed_version(GFile *dir,
+ gchar **version)
+{
+ GFile *file = NULL;
+ GFileInfo *info = NULL;
+ GFileInputStream *stream = NULL;
+ goffset count;
+ GError *err = NULL;
+ gboolean ret = FALSE;
+
+ file = g_file_get_child(dir, VERSION_FILE);
+ if (file == NULL)
+ return FALSE;
+
+ info = g_file_query_info(file, "standard", G_FILE_QUERY_INFO_NONE, NULL, &err);
+ if (err != NULL) {
+ /* In the case the file was not found, it just means that there's no
+ * osinfo-db installed in the specified, directory. Let's just return
+ * TRUE and proceed normally from here. */
+ if (err->code == G_IO_ERROR_NOT_FOUND) {
+ ret = TRUE;
+ goto cleanup;
+ }
+ g_printerr("Failed to query info for the "VERSION_FILE" file: %s\n",
+ err->message);
+ goto cleanup;
+ }
+
+ stream = g_file_read(file, NULL, &err);
+ if (err != NULL) {
+ g_printerr("Failed to read the "VERSION_FILE" file: %s\n",
+ err->message);
+ goto cleanup;
+ }
+
+ count = g_file_info_get_size(info);
+ *version = g_malloc0(count*sizeof(gchar));
+ if (*version == NULL)
+ goto cleanup;
+
+ if (!g_input_stream_read_all(G_INPUT_STREAM(stream),
+ (void *)*version,
+ count,
+ NULL,
+ NULL,
+ &err)) {
+ g_printerr("Failed get the "VERSION_FILE" file content: %s\n",
+ err->message);
+ goto cleanup;
+ }
+
+ ret = TRUE;
+
+ cleanup:
+ g_object_unref(file);
+ if (info != NULL)
+ g_object_unref(info);
+ if (stream != NULL)
+ g_object_unref(stream);
+ if (err != NULL)
+ g_error_free(err);
+ if (!ret)
+ g_free(*version);
+
+ return ret;
+}
+
+static gboolean osinfo_db_get_latest_info(gchar **version,
+ gchar **url)
+{
+ GFile *uri = NULL;
+ gchar **set = NULL;
+ gchar *content = NULL;
+ GError *err = NULL;
+ gboolean ret = FALSE;
+
+ uri = g_file_new_for_uri(LATEST_URI);
+ if (uri == NULL)
+ return FALSE;
+
+ if (!g_file_load_contents(uri, NULL, &content, NULL, NULL, &err)) {
+ g_printerr("Could not load the content of "LATEST_URI": %s\n",
+ err->message);
+ goto cleanup;
+ }
+
+ /* As the osinfo-db-latest.txt file has the following format:
+ * ```
+ * 20180920
+ * https://releases.pagure.org/libosinfo/osinfo-db-20180920.tar.xz
+ * ```
+ *
+ * We can safely split the content by "\n" that the first element
+ * of the resulting array will be the version and the second will
+ * be the url. */
+ set = g_strsplit(content, "\n", 0);
+ if (set == NULL)
+ goto cleanup;
+
+ *version = g_strdup(set[0]);
+ if (*version == NULL)
+ goto cleanup;
+
+ *url = g_strdup(set[1]);
+ if (*url == NULL)
+ goto cleanup;
+
+ ret = TRUE;
+
+ cleanup:
+ g_object_unref(uri);
+ if (set != NULL)
+ g_strfreev(set);
+ if (ret != TRUE) {
+ g_free(*version);
+ g_free(*url);
+ }
+
+ return ret;
+}
+
static int osinfo_db_import_extract(GFile *target,
const char *source,
gboolean verbose)
@@ -280,6 +404,8 @@ gint main(gint argc, gchar **argv)
gboolean user = FALSE;
gboolean local = FALSE;
gboolean system = FALSE;
+ gboolean latest = FALSE;
+ gchar *latest_url = NULL;
const gchar *root = "";
const gchar *archive = NULL;
const gchar *custom = NULL;
@@ -298,6 +424,8 @@ gint main(gint argc, gchar **argv)
N_("Import into custom directory"), NULL, },
{ "root", 0, 0, G_OPTION_ARG_STRING, &root,
N_("Installation root directory"), NULL, },
+ { "latest", 0, 0, G_OPTION_ARG_NONE, (void *)&latest,
+ N_("Import the latest osinfo-db from osinfo-db's website"), NULL, },
{ NULL, 0, 0, 0, NULL, NULL, NULL },
};
argv0 = argv[0];
@@ -339,6 +467,25 @@ gint main(gint argc, gchar **argv)
archive = argc == 2 ? argv[1] : NULL;
dir = osinfo_db_get_path(root, user, local, system, custom);
+
+ if (latest) {
+ gchar *installed_version = NULL;
+ gchar *latest_version = NULL;
+
+ if (!osinfo_db_get_installed_version(dir, &installed_version))
+ goto error;
+
+ if (!osinfo_db_get_latest_info(&latest_version, &latest_url))
+ goto error;
+
+ if (g_strcmp0(latest_version, installed_version) <= 0) {
+ ret = EXIT_SUCCESS;
+ goto error;
+ }
+
+ archive = latest_url;
+ }
+
if (osinfo_db_import_extract(dir, archive, verbose) < 0)
goto error;
@@ -348,6 +495,7 @@ gint main(gint argc, gchar **argv)
if (dir) {
g_object_unref(dir);
}
+ g_free(latest_url);
g_clear_error(&error);
g_option_context_free(context);
@@ -431,6 +579,13 @@ Prefix the installation location with the root directory
given by C<PATH>. This is useful when wishing to install
into a chroot environment or equivalent.
+=item B<--latest>
+
+Downloads the latest osinfo-db release from libosinfo's official
+releases website and installs it in the desired location.
+The latest osinfo-db release is only downloaded and installed
+when it's newer than the one installed in the desired location.
+
=item B<-v>, B<--verbose>
Display verbose progress information when installing files
--
2.19.1
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