1 files changed, 65 insertions, 0 deletions
diff --git a/ninja/src/browse.cc b/ninja/src/browse.cc
new file mode 100644
index 00000000000..83bfe431d87
--- /dev/null
+++ b/ninja/src/browse.cc
@@ -0,0 +1,65 @@
+// Copyright 2011 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "browse.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "../build/browse_py.h"
+
+void RunBrowsePython(State* state, const char* ninja_command,
+                     const char* initial_target) {
+  // Fork off a Python process and have it run our code via its stdin.
+  // (Actually the Python process becomes the parent.)
+  int pipefd[2];
+  if (pipe(pipefd) < 0) {
+    perror("ninja: pipe");
+    return;
+  }
+
+  pid_t pid = fork();
+  if (pid < 0) {
+    perror("ninja: fork");
+    return;
+  }
+
+  if (pid > 0) {  // Parent.
+    close(pipefd[1]);
+    do {
+      if (dup2(pipefd[0], 0) < 0) {
+        perror("ninja: dup2");
+        break;
+      }
+
+      // exec Python, telling it to run the program from stdin.
+      const char* command[] = {
+        NINJA_PYTHON, "-", ninja_command, initial_target, NULL
+      };
+      execvp(command[0], (char**)command);
+      perror("ninja: execvp");
+    } while (false);
+    _exit(1);
+  } else {  // Child.
+    close(pipefd[0]);
+
+    // Write the script file into the stdin of the Python process.
+    ssize_t len = write(pipefd[1], kBrowsePy, sizeof(kBrowsePy));
+    if (len < (ssize_t)sizeof(kBrowsePy))
+      perror("ninja: write");
+    close(pipefd[1]);
+    exit(0);
+  }
+}