1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
use v6;
unit class File::Which::Win32;
use NativeCall;
try require Win32::Registry qw<&RegGetValueW &key-exists &open-key &close-key &wstr>;
method which(Str $exec, Bool :$all = False) {
return Any unless $exec;
fail("This only works on Windows") unless $*DISTRO.is-win;
my @PATHEXT = '';
# WinNT. PATHEXT might be set on Cygwin, but not used.
if ( %*ENV<PATHEXT>.defined ) {
@PATHEXT = flat( %*ENV<PATHEXT>.split(';') );
} else {
# Win9X or other: doesn't have PATHEXT, so needs hardcoded.
@PATHEXT.push( <.com .exe .bat> );
}
my @results;
my @path = flat( $*SPEC.path );
for @path.map({ $*SPEC.catfile($_, $exec) }) -> $base {
for @PATHEXT -> $ext {
my $file = $base ~ $ext;
# Ignore possibly -x directories
next if $file.IO ~~ :d;
# Windows systems don't pass -x on
# non-exe/bat/com files. so we check -e.
# However, we don't want to pass -e on files
# that aren't in PATHEXT, like README.
if @PATHEXT[1..@PATHEXT.elems - 1].grep({ $file.match(/ $_ $ /, :i) })
&& $file.IO ~~ :e
{
if $all {
@results.push( $file );
} else {
return $file;
}
}
}
}
return @results.unique if $all && @results;
# Fallback to using win32 API to find executable location
return self.which-win32-api($exec, @PATHEXT) || Any;
}
#
# Searches for and retrieves a file or protocol association-related string from the registry.
#
# https://msdn.microsoft.com/en-us/library/windows/desktop/bb773471%28v=vs.85%29.aspx
# https://source.winehq.org/WineAPI/AssocQueryStringA.html
#
sub AssocQueryStringA(uint32 $flags, uint32 $str, Str $assoc, uint32 $extra,
CArray[uint8] $path, CArray[uint32] $out) returns uint32 is native('shlwapi') { * };
# This finds the executable path using the registry instead of the PATH
# environment variable
method which-win32-api(Str $exec, @paths) {
constant ASSOCF_OPEN_BYEXENAME = 0x2;
constant ASSOCSTR_EXECUTABLE = 0x2;
constant MAX_PATH = 260;
constant S_OK = 0;
my $path = CArray[uint8].new;
$path[$_] = 0 for 0..MAX_PATH - 1;
my $size = CArray[uint32].new;
$size[0] = MAX_PATH;
my $hresult = &::("AssocQueryStringA")(ASSOCF_OPEN_BYEXENAME, ASSOCSTR_EXECUTABLE,
$exec, 0, $path, $size);
# Return nothing if it fails
if $hresult == S_OK {
# Compose path from CArray using the size DWORD (uint32)
# Ignore null marker from null-terminated string
my $exe-path = '';
for 0 .. $size[0] - 2 {
$exe-path ~= chr($path[$_]);
}
# Return the executable path string if found
return $exe-path if $exe-path;
}
# search registry for apps
my $has-extension = @paths.first({ $exec.ends-with($_, :i)}).so;
my @keys-to-check;
@keys-to-check = $has-extension
?? $exec
!! @paths.map: { $exec ~ $_ } ;
my @hives-to-check = <local_machine current_user>;
my $key = 'SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths';
for @keys-to-check -> $k {
for @hives-to-check -> $h {
my $full-key = $h ~ "\\$key\\$k";
if &::("key-exists")($full-key) {
return get-path $full-key;
}
}
}
}
sub get-path(Str:D $key) {
my $k = &::("open-key")($key);
my int32 $b = 600;
my $value = CArray[uint16].new;
$value[$_] = 0 for ^$b;
my $blah = &::("RegGetValueW")($k, &::("wstr")(''), &::("wstr")(''), 0x0000ffff, 0,
$value, $b);
my $name = '';
$value[$b] = 0;
if !$blah {
for ^$b {
last if !$value[$_].so;
$name ~= chr($value[$_]);
}
}
&::("close-key")($k);
# Sometimes, the path is surrounded by quotes for some reason. Remove them.
$name.=trans( '"' => '');
return $name;
}
=begin pod
=head1 NAME
File::Which::Win32 - Win32 which implementation
=head1 SYNOPSIS
use File::Which::Win32;
my $o = File::Which::Win32.new;
say $o.which('raku');
=head1 DESCRIPTION
Implements the which method under win32-based platforms
=head1 METHODS
=head2 which
Returns the full executable path string
=head1 AUTHOR
Ahmad M. Zawawi <ahmad.zawawi@gmail.com>
=head1 COPYRIGHT AND LICENSE
Copyright 2016 Ahmad M. Zawawi
This library is free software; you can redistribute it and/or modify it under
the MIT License
=end pod
|
