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102 lines
3.1 KiB
Python
Executable File
102 lines
3.1 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# This script is run during configure, taking variables set in configure
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# and producing a JSON file that describes some portions of the build
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# configuration, such as the target OS and CPU.
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#
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# The output file is intended to be used as input to the mozinfo package.
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from __future__ import with_statement
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import os, re, sys
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def build_dict(env=os.environ):
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"""
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Build a dict containing data about the build configuration from
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the environment.
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"""
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d = {}
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# Check that all required variables are present first.
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required = ["TARGET_CPU", "OS_TARGET"]
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missing = [r for r in required if r not in env]
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if missing:
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raise Exception("Missing required environment variables: " %
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', '.join(missing))
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# os
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o = env["OS_TARGET"]
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known_os = {"Linux": "linux",
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"WINNT": "win",
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"Darwin": "mac",
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"Android": "android"}
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if o in known_os:
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d["os"] = known_os[o]
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else:
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# Allow unknown values, just lowercase them.
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d["os"] = o.lower()
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# processor
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p = env["TARGET_CPU"]
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# do some slight massaging for some values
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#TODO: retain specific values in case someone wants them?
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if p.startswith("arm"):
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p = "arm"
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elif re.match("i[3-9]86", p):
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p = "x86"
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d["processor"] = p
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# hardcoded list of 64-bit CPUs
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if p in ["x86_64", "ppc64"]:
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d["bits"] = 64
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# hardcoded list of known 32-bit CPUs
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elif p in ["x86", "arm", "ppc"]:
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d["bits"] = 32
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# other CPUs will wind up with unknown bits
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# debug
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d["debug"] = 'MOZ_DEBUG' in env and env['MOZ_DEBUG'] == '1'
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return d
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#TODO: replace this with the json module when Python >= 2.6 is a requirement.
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class JsonValue:
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"""
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A class to serialize Python values into JSON-compatible representations.
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"""
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def __init__(self, v):
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if v is not None and not (isinstance(v,str) or isinstance(v,bool) or isinstance(v,int)):
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raise Exception("Unhandled data type: %s" % type(v))
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self.v = v
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def __repr__(self):
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if self.v is None:
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return "null"
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if isinstance(self.v,bool):
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return str(self.v).lower()
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return repr(self.v)
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def jsonify(d):
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"""
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Return a JSON string of the dict |d|. Only handles a subset of Python
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value types: bool, str, int, None.
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"""
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jd = {}
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for k, v in d.iteritems():
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jd[k] = JsonValue(v)
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return repr(jd)
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def write_json(file, env=os.environ):
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"""
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Write JSON data about the configuration specified in |env|
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to |file|, which may be a filename or file-like object.
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See build_dict for information about what environment variables are used,
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and what keys are produced.
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"""
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s = jsonify(build_dict(env))
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if isinstance(file, basestring):
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with open(file, "w") as f:
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f.write(s)
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else:
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file.write(s)
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if __name__ == '__main__':
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try:
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write_json(sys.argv[1] if len(sys.argv) > 1 else sys.stdout)
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except Exception, e:
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print >>sys.stderr, str(e)
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sys.exit(1)
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