cpython/Mac/scripts/BuildApplet.py

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"""Create an applet from a Python script.
This puts up a dialog asking for a Python source file ('TEXT').
The output is a file with the same name but its ".py" suffix dropped.
It is created by copying an applet template and then adding a 'PYC '
resource named __main__ containing the compiled, marshalled script.
"""
DEBUG=0
import sys
sys.stdout = sys.stderr
import string
import os
import marshal
import imp
import macfs
import MACFS
import MacOS
from Res import *
# .pyc file (and 'PYC ' resource magic number)
MAGIC = imp.get_magic()
# Template file (searched on sys.path)
TEMPLATE = "PythonApplet"
# Specification of our resource
RESTYPE = 'PYC '
RESNAME = '__main__'
# A resource with this name sets the "owner" (creator) of the destination
# XXXX Should look for id=0
OWNERNAME = "owner resource"
# OpenResFile mode parameters
READ = 1
WRITE = 2
def findtemplate():
"""Locate the applet template along sys.path"""
for p in sys.path:
template = os.path.join(p, TEMPLATE)
try:
template, d1, d2 = macfs.ResolveAliasFile(template)
break
except (macfs.error, ValueError):
continue
else:
die("Template %s not found on sys.path" % `TEMPLATE`)
return
template = template.as_pathname()
return template
def main():
# Find the template
# (there's no point in proceeding if we can't find it)
template = findtemplate()
if DEBUG:
print 'Using template', template
# Ask for source text if not specified in sys.argv[1:]
if not sys.argv[1:]:
srcfss, ok = macfs.PromptGetFile('Select Python source file:', 'TEXT')
if not ok:
return
filename = srcfss.as_pathname()
tp, tf = os.path.split(filename)
if tf[-3:] == '.py':
tf = tf[:-3]
else:
tf = tf + '.applet'
dstfss, ok = macfs.StandardPutFile('Save application as:', tf)
if not ok: return
process(template, filename, dstfss.as_pathname())
else:
# Loop over all files to be processed
for filename in sys.argv[1:]:
process(template, filename, '')
def process(template, filename, output):
if DEBUG:
print "Processing", `filename`, "..."
# Read the source and compile it
# (there's no point overwriting the destination if it has a syntax error)
fp = open(filename)
text = fp.read()
fp.close()
try:
code = compile(text, filename, "exec")
except (SyntaxError, EOFError):
die("Syntax error in script %s" % `filename`)
return
# Set the destination file name
if string.lower(filename[-3:]) == ".py":
destname = filename[:-3]
rsrcname = destname + '.rsrc'
else:
destname = filename + ".applet"
rsrcname = filename + '.rsrc'
if output:
destname = output
# Try removing the output file
try:
os.unlink(output)
except os.error:
pass
# Create FSSpecs for the various files
template_fss = macfs.FSSpec(template)
template_fss, d1, d2 = macfs.ResolveAliasFile(template_fss)
dest_fss = macfs.FSSpec(destname)
# Copy data (not resources, yet) from the template
tmpl = open(template, "rb")
dest = open(destname, "wb")
data = tmpl.read()
if data:
dest.write(data)
dest.close()
tmpl.close()
# Open the output resource fork
try:
output = FSpOpenResFile(dest_fss, WRITE)
except MacOS.Error:
if DEBUG:
print "Creating resource fork..."
CreateResFile(destname)
output = FSpOpenResFile(dest_fss, WRITE)
# Copy the resources from the target specific resource template, if any
typesfound, ownertype = [], None
try:
input = FSpOpenResFile(rsrcname, READ)
except (MacOS.Error, ValueError):
pass
else:
typesfound, ownertype = copyres(input, output, [], 0)
CloseResFile(input)
# Check which resource-types we should not copy from the template
skiptypes = []
if 'SIZE' in typesfound: skiptypes.append('SIZE')
if 'BNDL' in typesfound: skiptypes = skiptypes + ['BNDL', 'FREF', 'icl4',
'icl8', 'ics4', 'ics8', 'ICN#', 'ics#']
skipowner = (ownertype <> None)
# Copy the resources from the template
input = FSpOpenResFile(template_fss, READ)
dummy, tmplowner = copyres(input, output, skiptypes, skipowner)
if ownertype == None:
ownertype = tmplowner
CloseResFile(input)
if ownertype == None:
die("No owner resource found in either resource file or template")
# Now set the creator, type and bundle bit of the destination
dest_finfo = dest_fss.GetFInfo()
dest_finfo.Creator = ownertype
dest_finfo.Type = 'APPL'
dest_finfo.Flags = dest_finfo.Flags | MACFS.kHasBundle
dest_finfo.Flags = dest_finfo.Flags & ~MACFS.kHasBeenInited
dest_fss.SetFInfo(dest_finfo)
# Make sure we're manipulating the output resource file now
UseResFile(output)
# Delete any existing 'PYC ' resource named __main__
try:
res = Get1NamedResource(RESTYPE, RESNAME)
res.RemoveResource()
except Error:
pass
# Create the raw data for the resource from the code object
data = marshal.dumps(code)
del code
data = (MAGIC + '\0\0\0\0') + data
# Create the resource and write it
id = 0
while id < 128:
id = Unique1ID(RESTYPE)
res = Resource(data)
res.AddResource(RESTYPE, id, RESNAME)
res.WriteResource()
res.ReleaseResource()
# Close the output file
CloseResFile(output)
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if DEBUG:
print "Applet created:", destname
# Copy resources between two resource file descriptors.
# skip a resource named '__main__' or (if skipowner is set) 'Owner resource'.
# Also skip resources with a type listed in skiptypes.
#
def copyres(input, output, skiptypes, skipowner):
ctor = None
alltypes = []
UseResFile(input)
ntypes = Count1Types()
for itype in range(1, 1+ntypes):
type = Get1IndType(itype)
if type in skiptypes:
continue
alltypes.append(type)
nresources = Count1Resources(type)
for ires in range(1, 1+nresources):
res = Get1IndResource(type, ires)
id, type, name = res.GetResInfo()
lcname = string.lower(name)
if (type, lcname) == (RESTYPE, RESNAME):
continue # Don't copy __main__ from template
# XXXX should look for id=0
if lcname == OWNERNAME:
if skipowner:
continue # Skip this one
else:
ctor = type
size = res.size
attrs = res.GetResAttrs()
if DEBUG:
print id, type, name, size, hex(attrs)
res.LoadResource()
res.DetachResource()
UseResFile(output)
try:
res2 = Get1Resource(type, id)
except MacOS.Error:
res2 = None
if res2:
if DEBUG:
print "Overwriting..."
res2.RemoveResource()
res.AddResource(type, id, name)
res.WriteResource()
attrs = attrs | res.GetResAttrs()
if DEBUG:
print "New attrs =", hex(attrs)
res.SetResAttrs(attrs)
UseResFile(input)
return alltypes, ctor
# Show a message and exit
def die(str):
message(str)
sys.exit(1)
# Show a message
def message(str, id = 256):
from Dlg import *
d = GetNewDialog(id, -1)
if not d:
print "Error:", `str`
print "DLOG id =", id, "not found."
return
tp, h, rect = d.GetDialogItem(2)
SetDialogItemText(h, str)
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d.SetDialogDefaultItem(1)
while 1:
n = ModalDialog(None)
if n == 1: break
del d
if __name__ == '__main__':
main()