dry run flag

1 files changed, 7 insertions, 2 deletions

diff --git a/src/ninja.cc b/src/ninja.cc
index fab3f3a..0b2af68 100644
--- a/src/ninja.cc
+++ b/src/ninja.cc
@@ -20,6 +20,7 @@ void usage() {
 "options:\n"
 "  -g       output graphviz dot file for targets and exit\n"
 "  -i FILE  specify input build file [default=build.ninja]\n"
+"  -n       dry run (don't run commands but pretend they succeeded)\n"
 "  -v       show all command lines\n"
           );
 }
@@ -34,8 +35,8 @@ int main(int argc, char** argv) {
   const char* input_file = "build.ninja";
 
   int opt;
-  bool graph = false, verbose = false;
-  while ((opt = getopt_long(argc, argv, "ghi:v", options, NULL)) != -1) {
+  bool dry_run = false, graph = false, verbose = false;
+  while ((opt = getopt_long(argc, argv, "ghi:nv", options, NULL)) != -1) {
     switch (opt) {
       case 'g':
         graph = true;
@@ -43,6 +44,9 @@ int main(int argc, char** argv) {
       case 'i':
         input_file = optarg;
         break;
+      case 'n':
+        dry_run = true;
+        break;
       case 'v':
         verbose = true;
         break;
@@ -87,6 +91,7 @@ int main(int argc, char** argv) {
 
   Builder builder(&state);
   builder.SetVerbose(verbose);
+  builder.SetDryRun(dry_run);
   for (int i = 0; i < argc; ++i) {
     if (!builder.AddTarget(argv[i], &err)) {
       if (!err.empty()) {