Force regen if ninja file is missing

For issue #39.

1 files changed, 20 insertions, 9 deletions

diff --git a/ninja.cc b/ninja.cc
index 896d87f..c638267 100644
--- a/ninja.cc
+++ b/ninja.cc
@@ -191,6 +191,14 @@ class NinjaGenerator {
     GenerateStamp(orig_args);
   }
 
+  static string GetNinjaFilename() {
+    return GetFilename("build%s.ninja");
+  }
+
+  static string GetShellScriptFilename() {
+    return GetFilename("ninja%s.sh");
+  }
+
   static string GetStampFilename() {
     return GetFilename(".kati_stamp%s");
   }
@@ -554,15 +562,7 @@ class NinjaGenerator {
     fprintf(fp_, "\n\n");
   }
 
-  string GetNinjaFilename() const {
-    return GetFilename("build%s.ninja");
-  }
-
-  string GetShellScriptFilename() const {
-    return GetFilename("ninja%s.sh");
-  }
-
-  string GetEnvScriptFilename() const {
+  static string GetEnvScriptFilename() {
     return GetFilename("env%s.sh");
   }
 
@@ -808,6 +808,17 @@ bool NeedsRegen(double start_time, const string& orig_args) {
       }                                                                 \
     })
 
+  if (!Exists(NinjaGenerator::GetNinjaFilename())) {
+    fprintf(stderr, "%s is missing, regenerating...\n",
+            NinjaGenerator::GetNinjaFilename().c_str());
+    return true;
+  }
+  if (!Exists(NinjaGenerator::GetShellScriptFilename())) {
+    fprintf(stderr, "%s is missing, regenerating...\n",
+            NinjaGenerator::GetShellScriptFilename().c_str());
+    return true;
+  }
+
   const string& stamp_filename = NinjaGenerator::GetStampFilename();
   FILE* fp = fopen(stamp_filename.c_str(), "rb+");
   if (!fp) {