move standalone script to become a plugin offering "--genscript",

adjust paths accordingly and add CHANGELOG entry.

--HG--
branch : trunk

py/plugin/pytest_genscript.py

@@ -0,0 +1,63 @@
+#! /usr/bin/env python
+
+import os
+import zlib
+import base64
+import sys
+try:
+    import pickle
+except Importerror:
+    import cPickle as pickle
+
+def pytest_addoption(parser):
+    group = parser.getgroup("general")
+    group.addoption("--genscript", action="store", default=None, 
+        dest="genscript", metavar="path", 
+        help="create standalone py.test script at given target path.")
+
+def pytest_configure(config):
+    genscript = config.getvalue("genscript")
+    if genscript:
+        import py
+        mydir = py.path.local(__file__).dirpath()
+        infile = mydir.join("standalonetemplate.py")
+        pybasedir = py.path.local(py.__file__).dirpath().dirpath()
+        main(pybasedir, outfile=genscript, infile=infile)
+        raise SystemExit(0)
+
+def main(pybasedir, outfile, infile):
+    os.chdir(str(pybasedir))
+    outfile = str(outfile)
+    infile = str(infile)
+    files = []
+    for dirpath, dirnames, filenames in os.walk("py"):
+        for f in filenames:
+            if not f.endswith(".py"):
+                continue
+                
+            fn = os.path.join(dirpath, f)
+            files.append(fn)
+
+    name2src = {}
+    for f in files:
+        k = f.replace("/", ".")[:-3]
+        name2src[k] = open(f, "rb").read()
+
+    data = pickle.dumps(name2src, 2)
+    data = zlib.compress(data, 9)
+    data = base64.encodestring(data)
+
+    exe = open(infile, "rb").read()
+    exe = exe.replace("@SOURCES@", data)
+
+    open(outfile, "wb").write(exe)
+    os.chmod(outfile, 493)  # 0755
+    sys.stdout.write("generated standalone py.test at %r, have fun!\n" % outfile)
+
+if __name__=="__main__":
+    dn = os.path.dirname
+    here = os.path.abspath(dn(__file__)) # py/plugin/
+    pybasedir = dn(dn(here))
+    outfile = os.path.join(os.getcwd(), "py.test-standalone")
+    infile = os.path.join(here, 'standalonetemplate.py')
+    main(pybasedir, outfile, infile)