Initial commit

tools/cml2-tools/configtrans.py

@@ -0,0 +1,122 @@
+#!/usr/bin/env python
+"""
+configtrans.py -- translate between CML1 and CML2 config formats.
+
+This handles the impedance mismatch between CML2's explicit NAME=VALUE
+output format and the formats expected by the Linux build machinery.
+
+Note: it also makes backups whenever it touches a file.
+
+configtrans.py -h includeout -s configout cml2file
+configtrans.py -t <newconfig >oldconfig
+"""
+import sys, os, getopt, re
+
+def linetrans(hook, instream, outstream, trailer=None):
+    "Line-by-line translation between streams."
+    if not hasattr(instream, "readline"):
+        instream = open(instream, "r")
+    if not hasattr(outstream, "readline"):
+        outstream = open(outstream, "w")
+    while 1:
+        line = instream.readline()
+        if not line:
+            break
+        new = hook(line)
+        if new:
+            outstream.write(new)
+    instream.close()
+    if trailer:
+        outstream.write(trailer)
+    outstream.close()
+
+def write_include(line):
+    "Transform a SYMBOL=VALUE line to CML1 include format."
+    if line.find("PRIVATE") > -1 or line[:2] == "$$":
+        return ""
+    match = isnotset.match(line)
+    if match:
+        return "#undef  %s\n" % match.group(1)
+    if line == "#\n":
+        return None
+    elif line[0] == "#":
+        return "/* " + line[1:].strip() + " */\n"
+    eq = line.find("=")
+    if eq == -1:
+        return line
+    else:
+        line = line.split('#')[0]
+        symbol = line[:eq]
+        value = line[eq+1 :].strip()
+    if value == 'y':
+        return "#define %s 1\n" % symbol
+    elif value == 'm':
+        return "#undef %s\n#define %s_MODULE 1\n" % (symbol, symbol)
+    elif value == 'n':
+        return "#undef  %s\n" % symbol
+    else:
+        return "#define %s %s\n" % (symbol, value)
+
+def write_defconfig(line):
+    "Transform a SYMBOL=VALUE line to CML1 defconfig format."
+    if line[:2] == "$$":
+        return ""
+    eq = line.find("=")
+    if eq == -1:
+        return line
+    else:
+        line = line.split('#')[0]
+        line = line.strip()
+        if len(line) == 0 or line[-1] != "\n":
+            line += "\n"
+        symbol = line[:eq]
+        value = line[eq+1:].strip()
+    if value == 'n':
+        return "# %s is not set\n" % symbol
+    else:
+        return line
+
+def revert(line):
+    "Translate a CML1 defconfig file to CML2 format."
+    match = isnotset.match(line)
+    if match:
+        return "%s=n\n" % match.group(1)
+    else:
+        return line
+
+if __name__ == '__main__':
+    isnotset = re.compile("^# (.*) is not set")
+    include = defconfig = translate = None
+    (options, arguments) = getopt.getopt(sys.argv[1:], "h:s:t")
+    for (switch, val) in options:
+	if switch == '-h':
+	    includefile = val
+            try:
+                os.rename(val, val + ".old")
+            except OSError:
+                pass
+	elif switch == '-s':
+	    defconfig = val
+            try:
+                os.rename(val, val + ".old")
+            except OSError:
+                pass
+	elif switch == '-t':
+            translate = 1
+    if len(arguments) > 0:
+        try:
+            if includefile:
+                linetrans(write_include, arguments[0], includefile, "#define AUTOCONF_INCLUDED\n")
+            if defconfig:
+                linetrans(write_defconfig, arguments[0], defconfig)
+        except IOError, args:
+            sys.stderr.write("configtrans: " + args[1] + "\n");
+            raise SystemExit, 1
+    elif translate:
+        linetrans(revert, sys.stdin, sys.stdout)
+    else:
+        print "usage: configtrans.py -t [-h includefile] [-s defconfig] file"
+        raise SystemExit, 1
+
+# That's all, folks!
+