1 files changed, 103 insertions, 0 deletions
diff --git a/src/ninja.cc b/src/ninja.cc
new file mode 100644
index 0000000..f39c77f
--- /dev/null
+++ b/src/ninja.cc
@@ -0,0 +1,103 @@
+#include "ninja.h"
+
+#include <getopt.h>
+#include <limits.h>
+#include <stdio.h>
+
+#include "build.h"
+#include "graphviz.h"
+#include "parsers.h"
+
+option options[] = {
+  { "help", no_argument, NULL, 'h' },
+  { }
+};
+
+void usage() {
+  fprintf(stderr,
+"usage: ninja [options] target\n"
+"\n"
+"options:\n"
+"  -g       output graphviz dot file for targets and exit\n"
+"  -i FILE  specify input build file [default=build.ninja]\n"
+          );
+}
+
+struct RealFileReader : public ManifestParser::FileReader {
+  bool ReadFile(const string& path, string* content, string* err) {
+    return ::ReadFile(path, content, err) == 0;
+  }
+};
+
+int main(int argc, char** argv) {
+  const char* input_file = "build.ninja";
+
+  int opt;
+  bool graph = false;
+  while ((opt = getopt_long(argc, argv, "ghi:", options, NULL)) != -1) {
+    switch (opt) {
+      case 'g':
+        graph = true;
+        break;
+      case 'i':
+        input_file = optarg;
+        break;
+      case 'h':
+      default:
+        usage();
+        return 1;
+    }
+  }
+  if (optind >= argc) {
+    fprintf(stderr, "expected target to build\n");
+    usage();
+    return 1;
+  }
+  argv += optind;
+  argc -= optind;
+
+  char cwd[PATH_MAX];
+  if (!getcwd(cwd, sizeof(cwd))) {
+    perror("getcwd");
+    return 1;
+  }
+
+  State state;
+  RealFileReader file_reader;
+  ManifestParser parser(&state, &file_reader);
+  parser.set_root(cwd);
+  string err;
+  if (!parser.Load(input_file, &err)) {
+    fprintf(stderr, "error loading '%s': %s\n", input_file, err.c_str());
+    return 1;
+  }
+
+  if (graph) {
+    GraphViz graph;
+    graph.Start();
+    for (int i = 0; i < argc; ++i)
+      graph.AddTarget(state.GetNode(argv[i]));
+    graph.Finish();
+    return 0;
+  }
+
+  Builder builder(&state);
+  for (int i = 0; i < argc; ++i) {
+    if (!builder.AddTarget(argv[i], &err)) {
+      if (!err.empty()) {
+        fprintf(stderr, "%s\n", err.c_str());
+        return 1;
+      } else {
+        // Added a target that is already up-to-date; not really
+        // an error.
+      }
+    }
+  }
+
+  bool success = builder.Build(&err);
+  if (!err.empty()) {
+    printf("build stopped: %s.\n", err.c_str());
+  }
+
+  return success ? 0 : 1;
+}