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"""
This file is part of the Ventoo program.
This is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
It is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this software. If not, see <http://www.gnu.org/licenses/>.
Copyright 2010 Christopher Harvey
"""
import augeas
import os.path as osp
import getpass
import shutil
import os
import pdb
"""
Fills the fileSet parameter with the files that augeas loaded.
The returned files are system paths
"""
def accumulateFiles(a, node="/files", fileSet=[]):
aug_root = a.get("/augeas/root")
thisChildren = a.match(osp.join(node, '*'))
for child in thisChildren:
sysPath = osp.join(aug_root, osp.relpath(child, '/files'))
if osp.isfile(sysPath):
fileSet.append(sysPath)
elif osp.isdir(sysPath):
accumulateFiles(a, child, fileSet)
return fileSet
"""
Use an augeas file path to get a ventoo module name.
"""
def getVentooModuleNameFromAugPath(a, augPath):
aug_root = a.get("/augeas/root")
sysPath = osp.join(aug_root, osp.relpath(augPath, '/files'))
return str.split(osp.split(sysPath)[1], ".")[0]
"""
Use a full system path to get a ventoo module name.
"""
def getVentooModuleNameFromSysPath(a, sysPath):
#remove the first character '/' if sysPath is absolute or join wont work.
if sysPath[0] == '/':
augQuery = osp.join('augeas/files', sysPath[1:], 'lens/info')
else:
augQuery = osp.join('augeas/files', sysPath, 'lens/info')
lensFile = a.get(augQuery)
return str.split(osp.split(lensFile)[1], ".")[0]
"""
Get an augeas path to a file from a system path
"""
def getAugeasPathFromSystemPath(a, sysPath):
aug_root = a.get("/augeas/root")
if aug_root != '/':
tmp = osp.relpath(sysPath, aug_root)
else:
tmp = sysPath
return osp.join('/files/', stripLeadingSlash(tmp))
"""
Return an int that says how much to add to 'have' so that it matches mult.
Mult can be a number, or ?, +, *
"""
def matchDiff(mult, have):
if mult == '*':
return 0
elif mult == '+':
if have > 0:
return 0
else:
return 1
elif mult == '?':
return 0
else:
return max(0, int(mult) - have)
"""
True if adding more to 'have' will make the match invalid.
"""
def matchExact(mult, have):
if mult == '*':
return False
elif mult == '+':
return False
elif mult == '?':
if have == 0:
return False
elif have == 1:
return True
else:
raise ValueError("passed ? and "+str(have)+" to matchExact")
elif int(mult) == have:
return True
elif int(mult) < have:
raise ValueError("passed "+mult+" and "+str(have)+" to matchExact")
return False
"""
True if the children in augPath are
augPath/1
augPath/2
etc...
"""
def isDupLevel(a, augPath):
q = osp.join(augPath, '*')
matches = a.match(q)
for match in matches:
try:
int(osp.split(match)[1])
return True
except ValueError:
pass
return False
"""
Turn /foo/bar/ into /foo/bar
"""
def stripTrailingSlash(a):
if a.endswith('/'):
ret = a[0:len(a)-1]
else:
ret = a
return ret
"""
Turn /foo/bar/ into foo/bar/
"""
def stripLeadingSlash(a):
if a.startswith('/'):
ret = a[1:]
else:
ret = a
return ret
def stripBothSlashes(a):
return stripTrailingSlash(stripLeadingSlash(a))
"""
Get the path to the directory where the diff tree is to be stored.
"""
def getDiffRoot():
return osp.join('/tmp', getpass.getuser(), 'augeas')
"""
Called by makeDiffTree, this actually checks files and performs the copies.
makeDiffTree only walks the directories and sets up the base paths.
"""
def __makeCopies(bases, currentDir, files):
#bases[0] = copyTargetBase
#bases[1] = aug_root
if osp.commonprefix([bases[0], currentDir]) == bases[0]:
return #ignore anything inside where we are copying to.
for f in files:
if f.endswith(".augnew"):
#print 'would copy ' + srcFile + ' to ' + targetDir
srcFile = osp.join(currentDir, f)
targetDir = osp.join(bases[0], osp.relpath(currentDir, bases[1]))
targetFile = osp.join(targetDir, f)
try:
os.makedirs(targetDir) #make sure target dir exists
except:
pass #don't care if it already exists.
shutil.copy(srcFile, targetFile)
"""
Make a tree in treeRoot that contains a replica of the edited
filesystem except with .augnew files for future comparisions.
"""
def makeDiffTree(a, treeRoot):
saveMethod = a.get('augeas/save')
userName = getpass.getuser()
#if userName == 'root':
# raise ValueError("this function isn't safe to be run as root.")
if saveMethod != 'newfile':
raise ValueError('the save method for augeas is not "newfile"')
if not osp.isdir(treeRoot):
raise ValueError(treeRoot + ' is not a directory')
files = accumulateFiles(a)
for i in range(len(files)): #append .augnew to each file.
files[i] += '.augnew'
a.save()
for f in files:
#each file could exist, copy the ones that do.
if osp.isfile(f):
try:
os.makedirs(osp.join("/tmp", userName, "augeas", stripLeadingSlash(osp.split(f)[0])))
except:
pass #don't care if it exists.
shutil.move(f, osp.join("/tmp", userName, "augeas", stripLeadingSlash(f)))
"""
Turns a system path like /etc/hosts into a the place where its
diff (edited) version would be saved. Use this function to compare
two files.
"""
def getDiffLocation(a, sysPath):
aug_root = a.get("/augeas/root")
return osp.join(getDiffRoot(), stripBothSlashes(sysPath)) + '.augnew'
def getFileErrorList(a, node = "augeas/files", errorList = {}):
aug_root = a.get("/augeas/files/")
thisChildren = a.match(osp.join(node, '*'))
for child in thisChildren:
thisError = a.get(osp.join(child, "error"))
if not thisError == None:
errorList[osp.relpath(child, "/augeas/files")] = thisError
else:
getFileErrorList(a, child, errorList)
return errorList
"""
Removes numbers form paths. a/1/foo/bar/5/6/blah -> a/foo/bar/blah
"""
def removeNumbers(path):
out = ""
for node in path.split("/"):
try:
tmp = int(node)
except ValueError:
out = osp.join(out, node)
return out
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