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# common python utility routines for the Bionic tool scripts
import logging
import os
import string
import sys
def panic(msg):
sys.stderr.write(os.path.basename(sys.argv[0]) + ": error: ")
sys.stderr.write(msg)
sys.exit(1)
def get_kernel_headers_dir():
return os.path.join(get_android_root(), "external/kernel-headers")
def get_kernel_headers_original_dir():
return os.path.join(get_kernel_headers_dir(), "original")
def get_kernel_headers_modified_dir():
return os.path.join(get_kernel_headers_dir(), "modified")
def get_kernel_dir():
return os.path.join(get_android_root(), "bionic/libc/kernel")
def get_android_root():
if "ANDROID_BUILD_TOP" in os.environ:
# Verify that the current directory is in the root.
# If not, then print an error.
cwd = os.getcwd()
root = os.environ["ANDROID_BUILD_TOP"]
if len(cwd) < len(root) or not root == cwd[:len(root)]:
panic("Not in android tree pointed at by ANDROID_BUILD_TOP (%s)\n" % root)
return os.environ["ANDROID_BUILD_TOP"]
panic("Unable to find root of tree, did you forget to lunch a target?\n")
class StringOutput:
def __init__(self):
self.line = ""
def write(self,msg):
self.line += msg
logging.debug("write '%s'" % msg)
def get(self):
return self.line
def create_file_path(path):
dirs = []
while 1:
parent = os.path.dirname(path)
#print "parent: %s <- %s" % (parent, path)
if parent == "/" or parent == "":
break
dirs.append(parent)
path = parent
dirs.reverse()
for dir in dirs:
#print "dir %s" % dir
if os.path.isdir(dir):
continue
os.mkdir(dir)
class BatchFileUpdater:
"""a class used to edit several files at once"""
def __init__(self):
self.old_files = set()
self.new_files = set()
self.new_data = {}
def readFile(self,path):
#path = os.path.realpath(path)
if os.path.exists(path):
self.old_files.add(path)
def readDir(self,path):
#path = os.path.realpath(path)
for root, dirs, files in os.walk(path):
for f in files:
dst = "%s/%s" % (root,f)
self.old_files.add(dst)
def editFile(self,dst,data):
"""edit a destination file. if the file is not mapped from a source,
it will be added. return 0 if the file content wasn't changed,
1 if it was edited, or 2 if the file is new"""
#dst = os.path.realpath(dst)
result = 1
if os.path.exists(dst):
f = open(dst, "r")
olddata = f.read()
f.close()
if olddata == data:
self.old_files.remove(dst)
return 0
else:
result = 2
self.new_data[dst] = data
self.new_files.add(dst)
return result
def getChanges(self):
"""determine changes, returns (adds, deletes, edits)"""
adds = set()
edits = set()
deletes = set()
for dst in self.new_files:
if not (dst in self.old_files):
adds.add(dst)
else:
edits.add(dst)
for dst in self.old_files:
if not dst in self.new_files:
deletes.add(dst)
return (adds, deletes, edits)
def _writeFile(self,dst):
if not os.path.exists(os.path.dirname(dst)):
create_file_path(dst)
f = open(dst, "w")
f.write(self.new_data[dst])
f.close()
def updateFiles(self):
adds, deletes, edits = self.getChanges()
for dst in sorted(adds):
self._writeFile(dst)
for dst in sorted(edits):
self._writeFile(dst)
for dst in sorted(deletes):
os.remove(dst)
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