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package Env::PS1; |
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978
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use strict; |
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use Carp; |
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6874
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use AutoLoader 'AUTOLOAD'; |
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2382
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our $VERSION = 0.06; |
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our $_getpwuid = eval { getpwuid($>) }; # Not supported on some platforms |
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sub import { |
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my $class = shift; |
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return unless @_; |
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my ($caller) = caller; |
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for (@_) { |
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/^\$(.+)/ or croak qq/$class can't export "$_", try "\$$_"/; |
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no strict 'refs'; |
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1507
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tie ${"$caller\::$1"}, $class, $1; |
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} |
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} |
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sub TIESCALAR { |
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my ($class, $var) = @_; |
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my $self = bless { |
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var => $var || 'PS1', |
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format => '', |
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}, $class; |
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2
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$self->cache(); |
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2
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return $self; |
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} |
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sub STORE { |
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my $self = shift; |
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if (ref $$self{var}) { ${$$self{var}} = shift } |
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else { $ENV{$$self{var}} = shift } |
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} |
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sub FETCH { |
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my $self = shift; |
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100
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my $format = ref($$self{var}) ? ${$$self{var}} : $ENV{$$self{var}} ; |
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$format =~ s#(\\\\)|(?
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100
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$1 ? '\\\\' : $2 ? $ENV{$2} : $ENV{$3} |
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100
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#ge; |
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100
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100
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unless ($format eq $$self{format} and exists $ENV{CLICOLOR} |
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and $ENV{CLICOLOR} eq $$self{clicolor}) { |
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@$self{qw/format clicolor/} = ($format, $ENV{CLICOLOR}); |
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$$self{cache} = [ $self->cache($format) ]; |
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} |
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100
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my $string = join '', map { ref($_) ? $_->() : $_ } @{$$self{cache}}; |
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12
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$string =~ s#\$\((.+)\)# |
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0
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0
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`$1`; |
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#ge; |
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12
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242
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return $string; |
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} |
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56
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sub sprintf { |
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1
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1
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1
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3
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my $format = pop; |
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1
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7
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$format =~ s#(\\\\)|(?
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0
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0
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0
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$1 ? '\\\\' : $2 ? $ENV{$2} : $ENV{$3} |
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0
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60
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#ge; |
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1
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50
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5
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return join '', map { ref($_) ? $_->() : $_ } Env::PS1->cache($format); |
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1
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12
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62
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} |
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64
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our @user_info; # ($name,$passwd,$uid,$gid,$quota,$comment,$gcos,$dir,$shell,$expire) |
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our %map; # for custom stuff |
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our %alias = ( |
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'$' => 'dollar', |
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'@' => 'D', t => 'D', T => 'D', A => 'D', |
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); |
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71
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sub cache { |
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14
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0
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my ($self, $format) = @_; |
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14
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100
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33
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return '' unless defined $format; # get rid of uninitialised warnings |
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12
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50
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15654
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@user_info = getpwuid($>) if $_getpwuid; |
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12
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25
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my @parts; |
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#print "# string: $format\n"; |
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12
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101
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while ($format =~ s/^(.*?)(\\\\|\\([aenr]|0\d\d)|\\(.)|!)//s) { |
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20
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100
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112
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push @parts, $1 || ''; |
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20
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100
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126
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if ($2 eq '\\\\') { push @parts, '\\' } # stripped when \! is substitued |
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100
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10
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100
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100
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100
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50
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80
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2
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elsif ($2 eq '!') { push @parts, '!!' } # posix prompt escape :$ |
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4
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340
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elsif ($3) { push @parts, eval qq/"\\$3"/ } |
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121
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elsif (exists $map{$4}) { |
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2
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my $item = $map{$4}; |
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2
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50
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66
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if (ref $item and $format =~ s/^\{(.*?)\}//) { |
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0
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0
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push @parts, $item->($1); # obscure foo |
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} |
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2
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8
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else { push @parts, $item } |
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} |
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elsif (grep {$4 eq $_} qw/C D P/) { # special cases |
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2
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6
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my $sub = $4 ; |
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2
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18
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$format =~ s/^\{(.*?)\}//; |
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2
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push @parts, $self->$sub($sub, $1); |
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} |
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0
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0
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elsif ($4 eq '[' or $4 eq ']') { next } |
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else { |
96
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8
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100
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31
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my $sub = exists($alias{$4}) ? $alias{$4} : uc($4) ; |
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8
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100
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push @parts, $self->can($sub) ? ($self->$sub($4)) : $4; |
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} |
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} |
100
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12
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push @parts, $format; |
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12
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22
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my @cache = (''); |
102
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12
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for (@parts) { # optimise: join strings, push code refs |
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50
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100
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100
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181
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if (ref $_ or ref $cache[-1]) { push @cache, $_ } |
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2
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6
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104
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48
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84
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else { $cache[-1] .= $_ } |
105
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} |
106
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12
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810
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return @cache; |
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} |
108
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109
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## format subs |
110
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111
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5
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5
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0
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49
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sub U { $user_info[0] || $ENV{USER} || $ENV{LOGNAME} } |
112
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113
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sub W { |
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0
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0
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0
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0
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0
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return sub { $ENV{PWD} eq $ENV{HOME} ? "~" : $ENV{PWD} } if $_[1] eq 'w'; |
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0
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115
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return sub { |
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0
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0
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0
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return '/' if $ENV{PWD} eq '/'; |
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0
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0
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0
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if($ENV{PWD} eq $ENV{HOME}) { |
118
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0
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return "~"; |
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} |
120
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0
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0
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$ENV{PWD} =~ m#([^/]*)/?$#; |
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0
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0
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return $1; |
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0
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0
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}; |
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} |
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125
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## others defined below for Autoload |
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127
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1; |
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129
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__END__ |