def getSquashList():
"""Get supprted squashfs compressions method"""
wantMethod = set(["lzo", "lzma", "xz", "gzip"])
usesSquashFs = getPkgActiveUses("sys-fs/squashfs-tools")
if not usesSquashFs:
return ["gzip"]
else:
pkgInfo = isPkgInstalled("sys-fs/squashfs-tools")
if pkgInfo and pkgInfo[0]["PV"]:
pkgVer = getTupleVersion(pkgInfo[0]["PV"])
gzipVer = getTupleVersion("4.2")
if pkgVer >= gzipVer:
usesSquashFs.append("gzip")
return map(lambda x: {"lzma": "xz"}.get(x, x), list(set(usesSquashFs) & wantMethod))
def isPkgInstalled(pkg, prefix="/", sortByVersion=False):
"""Check is package installed"""
pkgDir = path.join(prefix, "var/db/pkg")
if "/" in pkg:
category, op, pkg = pkg.partition("/")
res = map(
lambda x: x.update({"CATEGORY": category}) or x,
filter(lambda x: x["PN"] == pkg, map(reVerSplitToPV, listDirectory(path.join(pkgDir, category)))),
)
if len(res) > 1 and sortByVersion:
return sorted(res, key=lambda x: getTupleVersion(x["PVR"]))
else:
return res
else:
return filter(
lambda x: filter(lambda y: y["PN"] == pkg, map(reVerSplitToPV, listDirectory(x))),
listDirectory(pkgDir, fullPath=True),
)
