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# make_patch.py

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    00001 #!/usr/bin/env python
    00002
    00003 import os, sys, re
    00004 from subprocess import Popen, PIPE, STDOUT
    00005 from fnmatch import fnmatch
    00006 import logging
    00007
    00008 def command(cmd, *args, **kwargs):
    00009     """
    00010     Simple wrapper to execute a command and return standard output and standard error.
    00011     """
    00012     d = {"stdout": PIPE, "stderr": PIPE}
    00013     d.update(kwargs)
    00014     cmd = [cmd] + list(args)
    00015     logging.debug("Execute command: %r %r", " ".join(cmd), kwargs)
    00016     proc = apply(Popen, (cmd,), d)
    00017     return proc.communicate()
    00018
    00019 cmt = lambda *args, **kwargs: apply(command, ("cmt",) + args, kwargs)
    00020 cvs = lambda *args, **kwargs: apply(command, ("cvs",) + args, kwargs)
    00021 svn = lambda *args, **kwargs: apply(command, ("svn",) + args, kwargs)
    00022
    00023 def broadcast_packages():
    00024     """
    00025     Find the local packages the current one depends on (using 'cmt broadcast').
    00026     Returns a list of pairs ("package name","path to the cmt directory").
    00027     """
    00028     # make cmt print one line per package with python syntax
    00029     if not sys.platform.startswith("win"):
    00030         pkg_dirs = "[\n" + cmt("broadcast",r'echo "(\"<package>\", \"$PWD\"),"')[0] + ']'
    00031     else:
    00032         pkg_dirs = "[\n" + cmt("broadcast",r'echo ("<package>", r"%<package>root%\cmt"),')[0] + ']'
    00033     # Clean up a bit the output (actually needed only on Windows because of the newlines)
    00034     pkg_dirs = "\n".join([l.strip() for l in pkg_dirs.splitlines() if not l.startswith("#")])
    00035     return eval(pkg_dirs)
    00036
    00037 def matches(filename, patterns):
    00038     """
    00039     Returns True if any of the specified glob patterns (list of strings) matched
    00040     the string 'filename'.
    00041     """
    00042     for p in patterns:
    00043         if fnmatch(filename, p):
    00044             logging.debug("Excluding file: %r", filename)
    00045             return True
    00046     return False
    00047
    00048 def expand_dirs(files, basepath = ""):
    00049     """
    00050     Replace the entries in files that correspond to directories with the list of
    00051     files in those directories.
    00052     """
    00053     if basepath:
    00054         lb = len(basepath)+1
    00055     else:
    00056         lb = 0
    00057     newlist = []
    00058     for f in files:
    00059         base = os.path.join(basepath, f)
    00060         if os.path.isdir(base):
    00061             for root, ds, fs in os.walk(base):
    00062                 for ff in fs:
    00063                     newlist.append(os.path.join(root,ff)[lb:])
    00064         else:
    00065             newlist.append(f)
    00066     return newlist
    00067
    00068 def revision_diff_cmd(cwd):
    00069     if os.path.isdir(os.path.join(cwd, "CVS")):
    00070         return cvs("diff", "-upN", cwd = cwd)
    00071     else:
    00072         # special treatment to show new files in a way compatible with CVS
    00073         out, err = svn("status", cwd = cwd)
    00074
    00075         newfiles = [ l
    00076                      for l in out.splitlines()
    00077                      if l.startswith("? ") ]
    00078         out, err = svn("diff", cwd = cwd)
    00079         if newfiles:
    00080             out = "\n".join(newfiles) + "\n" + out
    00081         return out, err
    00082
    00083 def diff_pkg(name, cmtdir, exclusions = []):
    00084     """
    00085     Return the patch data for a package.
    00086     """
    00087     rootdir = os.path.dirname(cmtdir)
    00088     out, err = revision_diff_cmd(cwd = rootdir)
    00089     # extract new files
    00090     new_files = [ l.split(None,1)[1]
    00091                   for l in out.splitlines()
    00092                   if l.startswith("? ") ]
    00093     new_files = expand_dirs(new_files, rootdir)
    00094     new_files = [ f
    00095                   for f in new_files
    00096                   if not matches(f, exclusions) ]
    00097     # make diff segments for added files
    00098     for f in new_files:
    00099         logging.info("Added file %r", f)
    00100         #out += "diff -u -p -N %s\n" % os.path.basename(f)
    00101         #out += command("diff", "-upN", "/dev/null", f,
    00102         #               cwd = rootdir)[0]
    00103         out += "Index: %s\n" % f
    00104         out += "===================================================================\n"
    00105         out += command("diff", "-upN", "/dev/null", f,
    00106                        cwd = rootdir)[0]
    00107     # extract removed files
    00108     removed_files = [ l.split()[-1]
    00109                       for l in err.splitlines()
    00110                       if "cannot find" in l ]
    00111     removed_files = [ f
    00112                       for f in removed_files
    00113                       if not matches(f, exclusions) ]
    00114     # make diff segments for removed files (more tricky)
    00115     for f in removed_files:
    00116         logging.info("Removed file %r", f)
    00117         # retrieve the original content from CVS
    00118         orig = cvs("up", "-p", f,
    00119                    cwd = rootdir)[0]
    00120         out += "diff -u -p -N %s\n" % os.path.basename(f)
    00121         out += "--- %s\t1 Jan 1970 00:00:00 -0000\n" % f
    00122         out += "+++ /dev/null\t1 Jan 1970 00:00:00 -0000\n"
    00123         lines = orig.splitlines()
    00124         out += "@@ -1,%d +0,0 @@\n" % len(lines)
    00125         for l in lines:
    00126             out += '-%s\n' % l
    00127     # Fix the paths to have the package names
    00128     rex = re.compile(r"^(Index: |\? |\+\+\+ |--- (?!/dev/null))", re.MULTILINE)
    00129     out = rex.sub(r"\1%s/" % name, out)
    00130     return out
    00131
    00132 def main():
    00133     from optparse import OptionParser
    00134     parser = OptionParser(description = "Produce a patch file from a CMT project. "
    00135                                         "The patch contains the changes with respect "
    00136                                         "to the CVS repository, including new files "
    00137                                         "that are present only locally. Run the script "
    00138                                         "from the cmt directory of a package." )
    00139     parser.add_option("-x", "--exclude", action="append", type="string",
    00140                       metavar="PATTERN", dest="exclusions",
    00141                       help="Pattern to exclude new files from the patch")
    00142     parser.add_option("-o", "--output", action="store", type="string",
    00143                       help="Name of the file to send the output to. Standard "
    00144                            "output is used if not specified")
    00145     parser.add_option("-v", "--verbose", action="store_true",
    00146                       help="Print some progress information on standard error")
    00147     parser.add_option("--debug", action="store_true",
    00148                       help="Print debug information on standard error")
    00149     parser.set_defaults(exclusions = [])
    00150
    00151     opts, args = parser.parse_args()
    00152
    00153     if opts.debug:
    00154         logging.basicConfig(level = logging.DEBUG)
    00155     elif opts.verbose:
    00156         logging.basicConfig(level = logging.INFO)
    00157
    00158     # default exclusions
    00159     opts.exclusions += [ "*.py[co]",
    00160                          "*.patch",
    00161                          "cmt/cleanup.*",
    00162                          "cmt/setup.*",
    00163                          "cmt/*.make",
    00164                          "cmt/Makefile",
    00165                          "cmt/*.nmake",
    00166                          "cmt/*.nmakesav",
    00167                          "cmt/NMake",
    00168                          "cmt/install*.history",
    00169                          "cmt/build.*.log",
    00170                          "cmt/version.cmt",
    00171                          "genConf",
    00172                          "slc3_ia32_gcc323*",
    00173                          "slc4_ia32_gcc34*",
    00174                          "slc4_amd64_gcc34*",
    00175                          "slc4_amd64_gcc43*",
    00176                          "win32_vc71*",
    00177                          "i686-slc3-gcc323*",
    00178                          "i686-slc4-gcc34*",
    00179                          "i686-slc4-gcc41*",
    00180                          "x86_64-slc4-gcc34*",
    00181                          "x86_64-slc4-gcc41*",
    00182                          "i686-slc5-gcc43*",
    00183                          "x86_64-slc5-gcc43*",
    00184                          "x86_64-slc5-icc*",
    00185                          ]
    00186     if "CMTCONFIG" in os.environ:
    00187         opts.exclusions.append(os.environ["CMTCONFIG"])
    00188
    00189     # check if we are in the cmt directory before broadcasting
    00190     if not (os.path.basename(os.getcwd()) == "cmt" and os.path.exists("requirements")):
    00191         logging.error("This script must be executed from the cmt directory of a package.")
    00192         return 1
    00193
    00194     pkgs = broadcast_packages()
    00195     num_pkgs = len(pkgs)
    00196     count = 0
    00197
    00198     patch = ""
    00199     for name, path in pkgs:
    00200         count += 1
    00201         logging.info("Processing %s from %s (%d/%d)",
    00202                      name, os.path.dirname(path), count, num_pkgs)
    00203         patch += diff_pkg(name, path, opts.exclusions)
    00204
    00205     if sys.platform.startswith("win"):
    00206         # fix newlines chars
    00207         patch = patch.replace("\r","")
    00208
    00209     if opts.output:
    00210         logging.info("Writing patch file %r", opts.output)
    00211         open(opts.output,"w").write(patch)
    00212     else:
    00213         sys.stdout.write(patch)
    00214     return 0
    00215
    00216 if __name__ == "__main__":
    00217     sys.exit(main())