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1# Copyright (C) 2010 The Android Open Source Project
2#
3# Licensed under the Apache License, Version 2.0 (the "License");
4# you may not use this file except in compliance with the License.
5# You may obtain a copy of the License at
6#
7#      http://www.apache.org/licenses/LICENSE-2.0
8#
9# Unless required by applicable law or agreed to in writing, software
10# distributed under the License is distributed on an "AS IS" BASIS,
11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12# See the License for the specific language governing permissions and
13# limitations under the License.
14#
15# A nawk/gawk script used to extract the package name from an application's
16# manifest (i.e. AndroidManifest.xml). Usage is:
17#
18#   awk -f <this-script> AndroidManifest.xml
19#
20# The name itself is the value of the 'package' attribute in the
21# 'manifest' element.
22#
23
24BEGIN {
25    PACKAGE="";
26    while (xml_event()) {
27        # Simply extract the value of the 'name' attribute from
28        # the top-level <manifest> element.
29        if ( XML_TYPE == "BEGIN" && XML_RPATH == "MANIFEST/" ) {
30            PACKAGE = XML_ATTR["package"];
31            break;
32        }
33    }
34    if (!PACKAGE)
35        PACKAGE = "<none>";
36
37    print PACKAGE;
38}
39
40#
41# the following is copied directly from xml.awk - see this file for
42# usage and implementation details.
43#
44function xml_event () {
45    RS=">";
46    XML_TAG=XML_TYPE="";
47    split("", XML_ATTR);
48    while ( 1 ) {
49        if (_xml_closing) { # delayed direct tag closure
50            XML_TAG = _xml_closing;
51            XML_TYPE = "END";
52            _xml_closing = "";
53            _xml_exit(XML_TAG);
54            return 1;
55        }
56        if (getline <= 0) return 0; # read new input line
57        _xml_p = index($0, "<"); # get start marker
58        if (_xml_p == 0) return 0; # end of file (or malformed input)
59        $0 = substr($0, _xml_p) # remove anything before '<'
60        # ignore CData / Comments / Processing instructions / Declarations
61        if (_xml_in_section("<!\\[[Cc][Dd][Aa][Tt][Aa]\\[", "]]") ||
62            _xml_in_section("<!--", "--") ||
63            _xml_in_section("<\\?", "\\?") ||
64            _xml_in_section("<!", "")) {
65            continue;
66        }
67        if (substr($0, 1, 2) == "</") { # is it a closing tag ?
68            XML_TYPE = "END";
69            $0 = substr($0, 3);
70        } else { # nope, it's an opening one
71            XML_TYPE = "BEGIN";
72            $0 = substr($0, 2);
73        }
74        XML_TAG = $0
75        sub("[ \r\n\t/].*$", "", XML_TAG);  # extract tag name
76        XML_TAG = toupper(XML_TAG);       # uppercase it
77        if ( XML_TAG !~ /^[A-Z][-+_.:0-9A-Z]*$/ )  # validate it
78            _xml_panic("Invalid tag name: " XML_TAG);
79        if (XML_TYPE == "BEGIN") {  # update reverse path
80            _xml_enter(XML_TAG);
81        } else {
82            _xml_exit(XML_TAG);
83        }
84        sub("[^ \r\n\t]*[ \r\n\t]*", "", $0); # get rid of tag and spaces
85        while ($0) { # process attributes
86            if ($0 == "/") {  # deal with direct closing tag, e.g. </foo>
87                _xml_closing = XML_TAG; # record delayed tag closure.
88                break
89            }
90            _xml_attrib = $0;
91            sub(/=.*$/,"",_xml_attrib);  # extract attribute name
92            sub(/^[^=]*/,"",$0);         # remove it from record
93            _xml_attrib = tolower(_xml_attrib);
94            if ( _xml_attrib !~ /^[a-z][-+_0-9a-z:]*$/ ) # validate it
95                _xml_panic("Invalid attribute name: " _xml_attrib);
96            if (substr($0,1,2) == "=\"") { # value is ="something"
97                _xml_value = substr($0,3);
98                sub(/".*$/,"",_xml_value);
99                sub(/^="[^"]*"/,"",$0);
100            } else if (substr($0,1,2) == "='") { # value is ='something'
101                _xml_value = substr($0,3);
102                sub(/'.*$/,"",_xml_value);
103                sub(/^='[^']*'/,"",$0);
104            } else {
105                _xml_panic("Invalid attribute value syntax for " _xml_attrib ": " $0);
106            }
107            XML_ATTR[_xml_attrib] = _xml_value;  # store attribute name/value
108            sub(/^[ \t\r\n]*/,"",$0); # get rid of remaining leading spaces
109        }
110        return 1; # now return, XML_TYPE/TAG/ATTR/RPATH are set
111    }
112}
113
114function _xml_panic (msg) {
115    print msg > "/dev/stderr"
116    exit(1)
117}
118
119function _xml_in_section (sec_begin, sec_end) {
120    if (!match( $0, "^" sec_begin )) return 0;
121    while (!match($0, sec_end "$")) {
122        if (getline <= 0) _xml_panic("Unexpected EOF: " ERRNO);
123    }
124    return 1;
125}
126
127function _xml_enter (tag) {
128    XML_RPATH = tag "/" XML_RPATH;
129}
130
131function _xml_exit (tag) {
132    _xml_p = index(XML_RPATH, "/");
133    _xml_expected = substr(XML_RPATH, 1, _xml_p-1);
134    if (_xml_expected != XML_TAG)
135        _xml_panic("Unexpected close tag: " XML_TAG ", expecting " _xml_expected);
136    XML_RPATH = substr(XML_RPATH, _xml_p+1);
137}
138