Add command-line option to write output to a file

1 files changed, 11 insertions, 2 deletions

diff --git a/tools/serd-pipe.c b/tools/serd-pipe.c
index 080fc9a1..84893506 100644
--- a/tools/serd-pipe.c
+++ b/tools/serd-pipe.c
@@ -52,6 +52,7 @@ print_usage(const char* const name, const bool error)
     "  -s STRING    Parse STRING as input.\n"
     "  -t           Write terser output without newlines.\n"
     "  -v           Display version information and exit.\n"
+    "  -w FILENAME  Write output to FILENAME instead of stdout.\n"
     "  -x           Support parsing variable nodes like \"?x\".\n";
 
   FILE* const os = error ? stderr : stdout;
@@ -121,6 +122,7 @@ main(int argc, char** argv)
   const char*     add_prefix    = "";
   const char*     chop_prefix   = NULL;
   const char*     root_uri      = NULL;
+  const char*     out_filename  = NULL;
   int             a             = 1;
   for (; a < argc && argv[a][0] == '-'; ++a) {
     if (argv[a][1] == '\0') {
@@ -238,6 +240,13 @@ main(int argc, char** argv)
 
         input_string = argv[a];
         break;
+      } else if (opt == 'w') {
+        if (argv[a][o + 1] || ++a == argc) {
+          return missing_arg(argv[0], 'w');
+        }
+
+        out_filename = argv[a];
+        break;
       } else {
         SERDI_ERRORF("invalid option -- '%s'\n", argv[a] + 1);
         return print_usage(prog, true);
@@ -285,7 +294,7 @@ main(int argc, char** argv)
   SerdEnv* const env =
     serd_env_new(base ? serd_node_string_view(base) : serd_empty_string());
 
-  SerdOutputStream out = serd_open_tool_output("-");
+  SerdOutputStream out = serd_open_tool_output(out_filename);
   if (!out.stream) {
     perror("serdi: error opening output file");
     return 1;
@@ -366,7 +375,7 @@ main(int argc, char** argv)
   serd_node_free(base);
   serd_world_free(world);
 
-  if (fclose(stdout)) {
+  if (serd_close_output(&out)) {
     perror("serd-pipe: write error");
     st = SERD_BAD_STREAM;
   }