factor browse out into its own file

1 files changed, 53 insertions, 0 deletions

diff --git a/src/browse.cc b/src/browse.cc
new file mode 100644
index 0000000..4507e0d
--- /dev/null
+++ b/src/browse.cc
@@ -0,0 +1,53 @@
+// 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 "ninja.h"
+
+// Import browse.py as binary data.
+asm(
+".data\n"
+"browse_data_begin:\n"
+".incbin \"src/browse.py\"\n"
+"browse_data_end:\n"
+);
+// Declare the symbols defined above.
+extern const char browse_data_begin[];
+extern const char browse_data_end[];
+
+void RunBrowsePython(State* state, const char* ninja_command) {
+  // Create a temporary file, dump the Python code into it, and
+  // delete the file, keeping our open handle to it.
+  char tmpl[] = "browsepy-XXXXXX";
+  int fd = mkstemp(tmpl);
+  unlink(tmpl);
+  const int browse_data_len = browse_data_end - browse_data_begin;
+  int len = write(fd, browse_data_begin, browse_data_len);
+  if (len < browse_data_len) {
+    perror("write");
+    return;
+  }
+
+  // exec Python, telling it to use our script file.
+  const char* command[] = {
+    "python", "/proc/self/fd/3", ninja_command, NULL
+  };
+  execvp(command[0], (char**)command);
+
+  // If we get here, the exec failed.
+  printf("ERROR: Failed to spawn python for graph browsing, aborting.\n");
+}