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
|
#!/usr/bin/perl
use warnings;
use strict;
use v5.10.1;
use Cwd qw(abs_path);
use File::Spec;
use Getopt::Long;
use Pod::Usage;
my %opts = (
input => '@BUILDSCRIPT@',
template_dir => '@TEMPLATE_DIR@',
);
my $template_name_charset = qr/[[:alnum:]+_.@-]/;
my $template_marker = qr/# template/;
sub burp {
my ($file_name, @lines) = @_;
open (my $fh, ">", $file_name) || die "can't create $file_name $!" ;
print $fh @lines;
close $fh;
}
# read a template marker line and parse values into a hash
# format is "# template (start|input); key=value; key2=value2; ..."
sub parse_template_line {
my ($line, $filename, $linenumber) = @_;
my %values;
my ($marker, @elements) = split(/;\s?/, $line);
($values{command}) = ($marker =~ /$template_marker (.*)/);
foreach my $element (@elements) {
my ($key, $val) = ($element =~ /^([a-z0-9]+)=(.*)$/);
die "invalid key/value pair $filename:$linenumber: $line"
unless $key and $val;
$values{$key} = $val;
}
# end doesn't take arguments
if ($values{command} ne "end") {
if (!$values{name}) {
die "invalid template line: can't find template name\n",
"$filename:$linenumber: $line";
}
unless ($values{name} =~ /^$template_name_charset+$/) {
die "invalid chars used in name '$values{name}'. allowed: [:alnum:]+_.@-\n",
"$filename:$linenumber: $line";
}
}
return \%values;
}
# load a template, process possibly existing markers (nested templates)
sub load_template {
my ($values) = @_;
my $ret = "";
my $path;
if (!$opts{newest} and $values->{version}) {
$path = "$opts{template_dir}/$values->{name}-$values->{version}.template";
} else {
$path = "$opts{template_dir}/$values->{name}.template";
}
# resolve symlink(s) and use the real file's name for version detection
my ($version) = (abs_path($path) =~ /-([0-9.]+)[.]template$/);
if (!$version) {
die "Couldn't detect version for template '$values->{name}'";
}
my $parsed = process_file($path);
$ret .= "# template start; name=$values->{name}; version=$version;\n";
$ret .= $parsed;
$ret .= "# template end;\n";
return $ret;
}
# process input file and load templates for all markers found
sub process_file {
my ($filename) = @_;
my $ret = "";
my $nesting_level = 0;
my $linenumber = 0;
open (my $fh, "<", $filename) or die "failed to open '$filename': $!";
my @lines = <$fh>;
close $fh;
foreach my $line (@lines) {
$linenumber++;
if ($line =~ $template_marker) {
my $values = parse_template_line($line, $filename, $linenumber);
given ($values->{command}) {
when (['start', 'input']) {
if ($nesting_level == 0) {
$ret .= load_template($values);
}
}
when ('end') {
# nothing to do here, just for completeness
}
default {
die "Unknown template marker '$values->{command}'\n",
"$filename:$linenumber: $line";
}
}
$nesting_level++ if $values->{command} eq "start";
$nesting_level-- if $values->{command} eq "end";
# marker lines should never be added
next;
}
# we replace code inside blocks with the template
# so we ignore the content of the block
next if $nesting_level > 0;
$ret .= $line;
}
return $ret;
}
Getopt::Long::Configure ("bundling");
GetOptions(
"help" => sub {pod2usage(-exitval => 0, -verbose => 1); },
"h" => sub {pod2usage(-exitval => 0, -verbose => 0); },
"input|p=s" => \$opts{input},
"output|o=s" => \$opts{output},
"newest|n" => \$opts{newest},
"template-dir=s" => \$opts{template_dir},
) or pod2usage(1);
$opts{output} = $opts{input} unless $opts{output};
$opts{input} = "/dev/stdin" if $opts{input} eq "-";
$opts{output} = "/dev/stdout" if $opts{output} eq "-";
burp($opts{output}, process_file($opts{input}));
__END__
=head1 SYNOPSIS
makepkg-template [options]
Options:
--input, -p <file> Build script to read (default: @BUILDSCRIPT@)
--output, -o <file> file to output to (default: input file)
--newest, -n update templates to newest version
(default: use specified version in the template markers)
--template-dir <dir> directory to search for templates
(default: @TEMPLATE_DIR@)
=cut
# vim: set noet:
|
