use 4 space tabs in configure.py, warn on re2c missing

1 files changed, 14 insertions, 13 deletions

diff --git a/configure.py b/configure.py
index 287f58a..85661b7 100755
--- a/configure.py
+++ b/configure.py
@@ -234,21 +234,22 @@ if platform not in ('mingw', 'windows'):
 
 n.comment('the depfile parser and ninja lexers are generated using re2c.')
 def has_re2c():
-  import subprocess
-  try:
-    subprocess.call(['re2c', '-v'], stdout=subprocess.PIPE)
-    return True
-  except OSError:
-    return False
+    import subprocess
+    try:
+        subprocess.call(['re2c', '-v'], stdout=subprocess.PIPE)
+        return True
+    except OSError:
+        return False
 if has_re2c():
-  n.rule('re2c',
-         command='re2c -b -i --no-generation-date -o $out $in',
-         description='RE2C $out')
-  # Generate the .cc files in the source directory so we can check them in.
-  n.build(src('depfile_parser.cc'), 're2c', src('depfile_parser.in.cc'))
-  n.build(src('lexer.cc'), 're2c', src('lexer.in.cc'))
+    n.rule('re2c',
+           command='re2c -b -i --no-generation-date -o $out $in',
+           description='RE2C $out')
+    # Generate the .cc files in the source directory so we can check them in.
+    n.build(src('depfile_parser.cc'), 're2c', src('depfile_parser.in.cc'))
+    n.build(src('lexer.cc'), 're2c', src('lexer.in.cc'))
 else:
-  n.comment('(re2c not found, using checked-in cc files instead.)')
+    print ("warning: re2c not found; changes to src/*.in.cc will not affect "
+           "your build.")
 n.newline()
 
 n.comment('Core source files all build into ninja library.')