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stmt |
bran |
cond |
sub |
pod |
time |
code |
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package PerlX::bash; |
2
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3
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15
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15
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1703512
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use strict; |
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150
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15
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436
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4
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15
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15
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79
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use warnings; |
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34
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15
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422
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5
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6
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73
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use Exporter 'import'; |
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24
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15
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1408
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7
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our @EXPORT = ('bash'); |
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our @EXPORT_OK = (@EXPORT, qw< shq pwd head tail >); |
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our %EXPORT_TAGS = ( all => \@EXPORT_OK ); |
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our $VERSION = '0.05'; # VERSION |
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94
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use Carp; |
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38
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15
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860
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15
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15
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15
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13943
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use Contextual::Return; |
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15
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245269
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15
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87
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16
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15
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15
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25985
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use List::Util 1.33 qw< min max any >; |
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372
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15
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1622
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17
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15
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15
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107
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use Scalar::Util qw< blessed >; |
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25
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15
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677
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18
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15
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15
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8366
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use IPC::System::Simple qw< run capture EXIT_ANY $EXITVAL >; |
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15
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192813
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15
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17609
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19
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20
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# see e.g. https://mywiki.wooledge.org/BashGuide/SpecialCharacters |
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my $BASH_SPECIAL_CHARS = qr/[\s\$'"\\#\[\]!<>|;{}()~&]/; |
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my $BASH_REDIRECTION = qr/^\d[<>].+/; |
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24
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25
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26
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my @AUTOQUOTE = |
27
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( |
28
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sub { ref shift eq 'Regexp' }, |
29
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sub { blessed $_[0] and $_[0]->can('basename') }, |
30
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); |
31
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32
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sub _should_quote () |
33
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{ |
34
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168
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168
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248
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my $arg = $_; |
35
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168
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228
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local $_; |
36
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168
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100
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335
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1368
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return 1 if any { $_->($arg) } @AUTOQUOTE; |
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335
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912
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37
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161
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100
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4146
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return 0 if $arg =~ /^$BASH_SPECIAL_CHARS/; |
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142
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100
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827
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return 0 if $arg =~ $BASH_REDIRECTION; |
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136
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100
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1111
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return 1 if $arg =~ $BASH_SPECIAL_CHARS; |
40
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100
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314
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return 0; |
41
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} |
42
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43
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sub _process_bash_arg () |
44
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{ |
45
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# incoming arg is in $_ |
46
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169
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169
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298
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my $arg = $_; # make a copy |
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169
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100
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367
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croak("Use of uninitialized argument to bash") unless defined $arg; |
48
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168
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100
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299
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$arg = shq($arg) if _should_quote; |
49
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168
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546
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return $arg; |
50
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} |
51
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52
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53
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54
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sub bash (@) |
55
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{ |
56
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66
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66
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1
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95044
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my (@opts, $capture); |
57
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66
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803
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my $exit_codes = [0..125]; |
58
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59
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66
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137
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my $dash_c_cmd; |
60
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66
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100
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1116
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while ( $_[0] and ($_[0] =~ /^-/ or ref $_[0]) ) |
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100
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61
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{ |
62
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50
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147
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my $arg = shift; |
63
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50
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100
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286
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if (ref $arg) |
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100
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100
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64
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{ |
65
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36
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100
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166
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croak("bash: multiple capture specifications") if $capture; |
66
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35
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234
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$capture = $$arg; |
67
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} |
68
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elsif ($arg eq '-c') |
69
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{ |
70
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5
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8
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$dash_c_cmd = shift; |
71
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5
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100
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46
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croak("Missing argument for bash -c") unless length($dash_c_cmd); |
72
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} |
73
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elsif ($arg eq '-e') |
74
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{ |
75
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8
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101
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$exit_codes = [0]; |
76
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} |
77
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else |
78
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{ |
79
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1
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10
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push @opts, $arg; |
80
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} |
81
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} |
82
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63
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100
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185
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if (defined $dash_c_cmd) |
83
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{ |
84
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3
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100
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50
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croak("Too many arguments for bash -c") if @_; |
85
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} |
86
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else |
87
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{ |
88
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60
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100
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238
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croak("Not enough arguments for bash") unless @_; |
89
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56
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100
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66
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290
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$dash_c_cmd = shift if @_ == 1 and $_[0] and $_[0] =~ /\s/; |
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66
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90
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} |
91
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92
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58
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96
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my $filter; |
93
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58
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100
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175
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$filter = pop if ref $_[-1] eq 'CODE'; |
94
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58
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100
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100
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366
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croak("bash: multiple output redirects") if $capture and $filter; |
95
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96
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57
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194
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my @cmd = 'bash'; |
97
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57
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103
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push @cmd, @opts; |
98
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57
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159
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push @cmd, '-c'; |
99
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100
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57
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100
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250
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my $bash_cmd = $dash_c_cmd ? $dash_c_cmd : join(' ', map { _process_bash_arg } @_); |
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169
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367
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101
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56
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138
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push @cmd, $bash_cmd; |
102
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103
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56
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100
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165
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if ($capture) |
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100
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104
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{ |
105
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31
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70
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my $IFS = $ENV{IFS}; |
106
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31
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100
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94
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$IFS = " \t\n" unless defined $IFS; |
107
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108
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31
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164
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my $output = capture $exit_codes, qw< bash -c >, $bash_cmd; |
109
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30
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100
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168359
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if ($capture eq 'string') |
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100
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100
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110
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{ |
111
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24
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88
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chomp $output; |
112
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24
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1260
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return $output; |
113
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} |
114
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elsif ($capture eq 'lines') |
115
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{ |
116
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2
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19
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my @lines = split("\n", $output); |
117
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2
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100
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86
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return wantarray ? @lines : $lines[0]; |
118
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} |
119
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elsif ($capture eq 'words') |
120
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{ |
121
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3
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168
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my @words = split(/[$IFS]+/, $output); |
122
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3
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100
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156
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return wantarray ? @words : $words[0]; |
123
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} |
124
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else |
125
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{ |
126
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1
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85
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die("bash: unrecognized capture specification [$capture]"); |
127
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} |
128
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} |
129
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elsif ($filter) |
130
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{ |
131
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11
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100
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135
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$cmd[-1] =~ s/\s*(?
|
132
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9
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100
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69
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$cmd[-1] .= ' 2>&1' if $1; |
133
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134
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# This is pretty much straight out of `man perlipc`. |
135
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9
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38
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local *CHILD; |
136
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9
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8699
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my $pid = open(CHILD, "-|"); |
137
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9
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50
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449
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defined($pid) or die("bash: can't fork [$!]"); |
138
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139
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9
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100
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281
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if ($pid) # parent |
140
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{ |
141
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6
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106
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local $_; |
142
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6
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1476107
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while () |
143
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{ |
144
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60
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425
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chomp; |
145
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60
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268
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$filter->($_); |
146
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} |
147
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6
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100
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1562
|
unless (close(CHILD)) |
148
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{ |
149
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# You know how IPC::System::Simple says that `_process_child_error` is not intended |
150
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# to be called directly? Yeah, well, the alternatives are worse ... |
151
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1
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60
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IPC::System::Simple::_process_child_error($?, 'bash', $exit_codes); |
152
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} |
153
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} |
154
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else # child |
155
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{ |
156
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3
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0
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0
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exec(@cmd) or die("bash: can't exec program [$!]"); |
157
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} |
158
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} |
159
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else |
160
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{ |
161
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14
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60
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run $exit_codes, @cmd; |
162
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return |
163
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2
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2
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|
1182
|
BOOL { $EXITVAL == 0 } |
164
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3
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3
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|
3902
|
SCALAR { $EXITVAL } |
165
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12
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77988
|
; |
166
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} |
167
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} |
168
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169
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170
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sub shq |
171
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{ |
172
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46
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46
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1
|
1394
|
local $_ = shift; |
173
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#$_ = "$_"; # stringify |
174
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46
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256
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s/'/'\\''/g; # handle internal single quotes |
175
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46
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213
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"'$_'"; # quote with single quotes |
176
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} |
177
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178
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179
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180
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15
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15
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136
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use Cwd (); |
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15
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35
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15
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2705
|
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181
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*pwd = \&Cwd::cwd; |
182
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183
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184
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185
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sub head |
186
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|
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{ |
187
|
7
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|
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7
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1
|
1998
|
my $num = shift; |
188
|
7
|
100
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|
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|
56
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$num = $num < 0 ? @_ + $num : min($num, scalar @_); |
189
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7
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47
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@_[0..$num-1]; |
190
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} |
191
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192
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sub tail |
193
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|
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{ |
194
|
7
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7
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1
|
996
|
my $num = shift; |
195
|
7
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100
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23
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return () unless $num; |
196
|
6
|
100
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23
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$num = $num < 0 ? max(@_ + $num, 0) : $num - 1 ; |
197
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6
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35
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@_[$num..$#_]; |
198
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} |
199
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200
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201
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1; |
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# ABSTRACT: tighter integration between Perl and bash |
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# COPYRIGHT |
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# |
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# This module is similar to the solution presented here: |
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# http://stackoverflow.com/questions/571368/how-can-i-use-bash-syntax-in-perls-system |
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__END__ |