[gnome-continuous-yocto/gnomeostree-3.28-rocko: 7983/8267] oe-pkgdata-util: add unescape option to read-value

[Emmanuele Bassi <ebassi src gnome org>]

commit 6172b0131fbfc3a43b7b6d98819058f1e2ce2a92
Author: Ross Burton <ross burton intel com>
Date:   Wed Oct 4 14:12:41 2017 +0100

    oe-pkgdata-util: add unescape option to read-value
    
    Some fields are multiline values which have been escaped, so add an option to
    unescape the \n and \t.
    
    (From OE-Core rev: 4165ec0057c6bbb24de681572034262351d9b34f)
    
    Signed-off-by: Ross Burton <ross burton intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 scripts/oe-pkgdata-util |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/scripts/oe-pkgdata-util b/scripts/oe-pkgdata-util
index a690870..c6fba56 100755
--- a/scripts/oe-pkgdata-util
+++ b/scripts/oe-pkgdata-util
@@ -197,6 +197,10 @@ def read_value(args):
                 # PKGSIZE is now in bytes, but we we want it in KB
                 pkgsize = (int(value) + 1024 // 2) // 1024
                 value = "%d" % pkgsize
+            if args.unescape:
+                import codecs
+                # escape_decode() unescapes backslash encodings in byte streams
+                value = codecs.escape_decode(bytes(value, "utf-8"))[0].decode("utf-8")
             if args.prefix_name:
                 print('%s %s' % (pkg_name, value))
             else:
@@ -552,6 +556,7 @@ def main():
     parser_read_value.add_argument('pkg', nargs='*', help='Runtime package name to look up')
     parser_read_value.add_argument('-f', '--file', help='Read package names from the specified file (one per 
line, first field only)')
     parser_read_value.add_argument('-n', '--prefix-name', help='Prefix output with package name', 
action='store_true')
+    parser_read_value.add_argument('-u', '--unescape', help='Expand escapes such as \\n', 
action='store_true')
     parser_read_value.set_defaults(func=read_value)
 
     parser_glob = subparsers.add_parser('glob',