Set cd-create-profile date to SOURCE_DATE_EPOCH or input timestamp

Since cd-create-profile is transforming existing data into an ICC profile it
makes sense for the creation timestamp of the ICC profile to be the modification
time of the source data.

It also respects the SOURCE_DATE_EPOCH environment variable for ease of
reproducible package builds.

1 files changed, 52 insertions, 0 deletions

diff --git a/client/cd-create-profile.c b/client/cd-create-profile.c
index e4f0f4a..34aabca 100644
--- a/client/cd-create-profile.c
+++ b/client/cd-create-profile.c
@@ -681,6 +681,51 @@ cd_util_icc_set_metadata_coverage (CdIcc *icc, GError **error)
 	return TRUE;
 }
 
+static GDateTime *
+cd_util_get_creation_time (const gchar *source_filename, GError **error)
+{
+	GTimeVal epoch_tv;
+	const gchar *epoch_str;
+	g_autoptr(GDateTime) creation_time = NULL;
+	g_autoptr(GFileInfo) file_info = NULL;
+	g_autoptr(GFile) source_file = NULL;
+
+	/* use SOURCE_DATE_EPOCH if specified */
+	epoch_str = g_getenv ("SOURCE_DATE_EPOCH");
+	if (epoch_str != NULL) {
+		guint64 epoch_val = g_ascii_strtoull (epoch_str, NULL, 10);
+		if (epoch_val == 0) {
+			g_set_error (error, 1, 0,
+				     "$SOURCE_DATE_EPOCH invalid %s",
+				     epoch_str);
+			return NULL;
+		}
+		creation_time = g_date_time_new_from_unix_utc (epoch_val);
+		if (creation_time == NULL) {
+			g_set_error_literal (error, 1, 0,
+					     "build date not supported");
+			return NULL;
+		}
+		return g_steal_pointer (&creation_time);
+	}
+
+	/* use the source file */
+	source_file = g_file_new_for_path (source_filename);
+	file_info = g_file_query_info (source_file,
+				       G_FILE_ATTRIBUTE_TIME_MODIFIED,
+				       0, NULL, error);
+	if (file_info == NULL)
+		return NULL;
+	g_file_info_get_modification_time (file_info, &epoch_tv);
+	creation_time = g_date_time_new_from_unix_utc (epoch_tv.tv_sec);
+	if (creation_time == NULL) {
+		g_set_error_literal (error, 1, 0,
+				     "build date not supported");
+		return NULL;
+	}
+	return g_steal_pointer (&creation_time);
+}
+
 static gboolean
 cd_util_create_from_xml (CdUtilPrivate *priv,
 			 const gchar *filename,
@@ -693,6 +738,7 @@ cd_util_create_from_xml (CdUtilPrivate *priv,
 	gssize data_len = -1;
 	g_autofree gchar *data = NULL;
 	g_autoptr(CdDom) dom = NULL;
+	g_autoptr(GDateTime) creation_time = NULL;
 
 	/* parse the XML into DOM */
 	if (!g_file_get_contents (filename, &data, (gsize *) &data_len, error))
@@ -757,6 +803,12 @@ cd_util_create_from_xml (CdUtilPrivate *priv,
 				     cd_dom_get_node_data (tmp));
 	}
 
+	/* set created time */
+	creation_time = cd_util_get_creation_time (filename, error);
+	if (creation_time == NULL)
+		return FALSE;
+	cd_icc_set_created (priv->icc, creation_time);
+
 	/* add CMS defines */
 	cd_icc_add_metadata (priv->icc,
 			     CD_PROFILE_METADATA_CMF_PRODUCT,