Prettier printing of errors.

helpers.py

@@ -50,10 +50,19 @@ def _clog(s):
     _log('\x1b[32mredo: %s\x1b[1m%s\x1b[m' % (vars.DEPTH, s))
 def _bwlog(s):
     _log('redo: %s%s' % (vars.DEPTH, s))
+
+def _cerr(s):
+    _log('\x1b[31mredo: %s\x1b[1m%s\x1b[m' % (vars.DEPTH, s))
+def _bwerr(s):
+    _log('redo: %s%s' % (vars.DEPTH, s))
+
+
 if os.isatty(2):
     log = _clog
+    err = _cerr
 else:
     log = _bwlog
+    err = _bwerr
 
 
 def debug(s):
@@ -61,7 +70,6 @@ def debug(s):
         _log('redo: %s%s' % (vars.DEPTH, s))
 
 
-
 def relpath(t, base):
     t = os.path.abspath(t)
     tparts = t.split('/')

redo-ifchange.py

@@ -45,8 +45,8 @@ def dirty_deps(t, depth):
 
 
 if not vars.TARGET:
-    sys.stderr.write('redo-ifchange: error: must be run from inside a .do\n')
+    err('redo-ifchange: error: must be run from inside a .do\n')
-    sys.exit(1)
+    sys.exit(100)
 
 want_build = []
 for t in sys.argv[1:]:

redo-ifcreate.py

@@ -5,8 +5,8 @@ from helpers import *
 
 
 if not vars.TARGET:
-    sys.stderr.write('redo-ifcreate: error: must be run from inside a .do\n')
+    err('redo-ifcreate: error: must be run from inside a .do\n')
-    sys.exit(1)
+    sys.exit(100)
 
 for t in sys.argv[1:]:
     mkdirp('%s/.redo' % vars.BASE)

redo.py

@@ -33,6 +33,10 @@ import vars
 from helpers import *
 
 
+class BuildError(Exception):
+    pass
+
+
 def find_do_file(t):
     dofile = '%s.do' % t
     if os.path.exists(dofile):
@@ -75,7 +79,7 @@ def build(t):
             stamp(t)
             return  # success
         else:
-            raise Exception('no rule to make %r' % t)
+            raise BuildError('no rule to make %r' % t)
     stamp(dofile)
     unlink(t)
     tmpname = '%s.redo.tmp' % t
@@ -102,7 +106,7 @@ def build(t):
         unlink(stampfile)
     f.close()
     if rv != 0:
-        raise Exception('non-zero return code building %r' % t)
+        raise BuildError('%s: exit code %d' % (t,rv))
 
 
 if not vars.DEPTH:
@@ -113,8 +117,14 @@ if not vars.DEPTH:
     dirnames = [os.path.dirname(p) for p in exenames]
     os.environ['PATH'] = ':'.join(dirnames) + ':' + os.environ['PATH']
 
+retcode = 0
 startdir = os.getcwd()
 for t in targets:
     mkdirp('%s/.redo' % vars.BASE)
     os.chdir(startdir)
+    try:
         build(t)
+    except BuildError, e:
+        err('%s\n' % e)
+        retcode = 1
+sys.exit(retcode)