Add (forced) dependency checking.

Author: retropc

.hgignore

@@ -14,3 +14,5 @@ defargs.conf
 Thumbs.db
 [dD]esktop.ini
 static/{ugly,swm,mocha,q}ui{,debug}.html
+{bin/,}.checked
+{bin/,}.compiled

bin/compile.py

@@ -1,4 +1,7 @@
 #!/usr/bin/env python
+import dependencies
+dependencies.vcheck()
+
 import pages, os, subprocess, pagegen, shutil, sys
 
 COPYRIGHT = open("js/copyright.js", "rb").read()
@@ -92,6 +95,33 @@ def main(outputdir=".", produce_debug=True):
 
   os.rmdir(coutputdir)
 
+  f = open(".compiled", "w")
+  f.close()
+  
+def has_compiled():
+  try:
+    f = open(".compiled", "r")
+    f.close()
+    return True
+  except:
+    pass
+    
+  try:
+    f = open(os.path.join("bin", ".compiled"), "r")
+    f.close()
+    return True
+  except:
+    pass
+  
+  return False
+  
+def vcheck():
+  if has_compiled():
+    return
+    
+  print >>sys.stderr, "error: not yet compiled, run compile.py first."
+  sys.exit(1)
+  
 if __name__ == "__main__":
   main()
 

bin/dependencies.py

@@ -0,0 +1,45 @@
+import sys
+
+def check_dependencies():
+  def fail(message):
+    sys.stderr.write(message + "\n")
+    sys.stderr.flush()
+    sys.exit(1)
+    
+  major, minor = sys.version_info[:2]
+  if major >= 3:
+    fail("qwebirc cannot run on python >=3 yet, install python 2.6.X:\nhttp://www.python.org/download/")
+    
+  if major < 2 or minor < 5:
+    fail("qwebirc requires python 2.5, you have: %s, install python 2.6.X:\nhttp://www.python.org/download/" % ".".join(map(str, sys.version_info[:3])))
+	
+  # this is done so we can use Python 2.5 syntax...
+  import dependencies_b
+  dependencies_b.check_dependencies()
+
+def has_checked():
+  try:
+    f = open(".checked", "r")
+    f.close()
+    return True
+  except:
+    pass
+    
+  try:
+    f = open(os.path.join("bin", ".checked"), "r")
+    f.close()
+    return True
+  except:
+    pass
+  
+  return False
+  
+def vcheck():
+  if not has_checked():
+    sys.stderr.write("first run, checking dependencies...\n")
+    sys.stderr.flush()
+    check_dependencies()
+
+if __name__ == "__main__":
+  check_dependencies()
+  

bin/dependencies_b.py

@@ -0,0 +1,105 @@
+# this is seperate to allow us to use python 2.5 syntax without
+# the dependency checker breaking on earlier versions.
+
+import sys
+import subprocess
+
+def fail(*message):
+  print >>sys.stderr, "\n".join(message)
+  sys.exit(1)
+  
+def warn(*message):
+  print >>sys.stderr, "warning:", "\nwarning: ".join(message), "\n"
+
+def check_dependencies():
+  i = 0
+  
+  check_twisted()
+  check_win32()
+  i+=check_java()
+  i+=check_hg()
+  
+  print "0 errors, %d warnings." % i
+  
+  if i == 0:
+    print "looks like you've got everything you need to run qwebirc!"
+  else:
+    print "you can run qwebirc despite these."
+
+  f = open(".checked", "w")
+  f.close()
+  
+def check_win32():
+  if not sys.platform.startswith("win"):
+    return
+  
+  try:
+    import win32con
+  except ImportError:
+    fail("qwebirc requires pywin32, see:", "http://sourceforge.net/project/showfiles.php?group_id=78018")
+  
+def check_java():
+  def java_warn(specific):
+    warn(specific, "java is not required, but allows qwebirc to compress output,", "making it faster to download.", "you can get java at http://www.java.com/")
+    
+  try:
+    p = subprocess.Popen(["java", "-version"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    p.communicate()
+    if p.wait() != 0:
+      java_warn("something went wrong looking for java.")
+      return 1
+  except WindowsError:
+    java_warn("couldn't find java.")
+    return 1
+    
+  return 0
+  
+def check_hg():
+  def hg_warn(specific):
+    warn(specific, "mercurial (hg) is not required, but allows qwebirc to save bandwidth by versioning.", "you can get hg at http://www.selenic.com/mercurial/")
+    
+  try:
+    p = subprocess.Popen(["hg", "id"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    p.communicate()
+    if p.wait() != 0:
+      hg_warn("something went wrong looking for mercurial.")
+      return 1
+  except WindowsError:
+    hg_warn("couldn't find mercurial.")
+    return 1
+    
+  return 0
+  
+def check_twisted():
+  try:
+    import twisted
+  except ImportError:
+    fail("qwebirc requires twisted (at least 8.2.0), see http://twistedmatrix.com/")
+
+  twisted_fail = lambda x, y=None: fail("you don't seem to have twisted's %s module." % x,
+                                        "your distro is most likely modular, look for a twisted web package%s." % (" %s" % y if y else "",))
+
+  try:
+    import twisted.names
+  except ImportError:
+    twisted_fail("names")
+
+  try:
+    import twisted.mail
+  except ImportError:
+    twisted_fail("mail")
+    fail("you don't seem to have twisted's mail module, your distro is most likely modular, look for a twisted mail package.")
+
+  try:
+    import twisted.web
+  except ImportError:
+    twisted_fail("web", "(not web2)")
+
+  try:
+    import twisted.words
+  except ImportError:
+    twistedfail("words")
+
+if __name__ == "__main__":
+  import dependencies
+  dependencies.check_dependencies()

clean.py

@@ -11,7 +11,11 @@
   tryunlink("static", "css", x + ".css")
   tryunlink("static", "%s.html" % x)
   tryunlink("static", "%sdebug.html" % x)  
-
+  tryunlink(".checked")
+  tryunlink(".compiled")
+  tryunlink("bin", ".checked")
+  tryunlink("bin", ".compiled")
+  
 if __name__ == "__main__":
   tryunlink("static", "js", "qwebirc.js")
   cleanpyc.main()

run.py

@@ -1,5 +1,8 @@
 #!/usr/bin/env python
 # this entire thing is a hack and badly needs reimplementing
+import bin.compile
+bin.compile.vcheck()
+
 DEFAULT_PORT = 9090
 
 from twisted.scripts.twistd import run