make platform a command-line arg to configure

2 files changed, 20 insertions, 10 deletions

diff --git a/HACKING b/HACKING
index f70b2bf..48e695c 100644
--- a/HACKING
+++ b/HACKING
@@ -35,7 +35,7 @@ Documentation guidelines:
 
 Windows development:
 - sudo apt-get install gcc-mingw32 wine
-- NINJA_PLATFORM=mingw ./configure
+- ./configure.py --platform=mingw
 - Build gtest:
   - unpack it into your source dir
   - ./configure CC=i586-mingw32msvc-cc CXX=i586-mingw32msvc-c++
diff --git a/configure.py b/configure.py
index 48b4ce1..1dc777e 100755
--- a/configure.py
+++ b/configure.py
@@ -19,21 +19,31 @@
 Projects that use ninja themselves should either write a similar script
 or use a meta-build system that supports Ninja output."""
 
+from optparse import OptionParser
 import os
 import sys
 sys.path.insert(0, 'misc')
 
 import ninja
 
-platform = os.environ.get('NINJA_PLATFORM', sys.platform)
-if platform.startswith('linux'):
-    platform = 'linux'
-elif platform.startswith('freebsd'):
-    platform = 'freebsd'
-elif platform.startswith('mingw'):
-    platform = 'mingw'
-elif platform.startswith('win'):
-    platform = 'windows'
+parser = OptionParser()
+platforms = ['linux', 'freebsd', 'mingw', 'windows']
+parser.add_option('--platform',
+                  help='target platform (' + '/'.join(platforms) + ')',
+                  choices=platforms)
+(options, args) = parser.parse_args()
+
+platform = options.platform
+if platform is None:
+    platform = sys.platform
+    if platform.startswith('linux'):
+        platform = 'linux'
+    elif platform.startswith('freebsd'):
+        platform = 'freebsd'
+    elif platform.startswith('mingw'):
+        platform = 'mingw'
+    elif platform.startswith('win'):
+        platform = 'windows'
 
 BUILD_FILENAME = 'build.ninja'
 buildfile = open(BUILD_FILENAME, 'w')