144 lines
2.9 KiB
Plaintext
144 lines
2.9 KiB
Plaintext
|
#!/usr/bin/perl
|
||
|
|
|
||
|
|
# Given a list of filenames on the command line or on stdin this
|
||
|
|
# script returns the interpreter that is required to run the
|
||
|
|
# filenames. Usually this is extracted from the #! line of the file
|
||
|
|
# but we also handle the various 'exec' tricks that people use to
|
||
|
|
# start the interpreter via an intermediate shell.
|
||
|
|
|
||
|
|
# Also we want to convert:
|
||
|
|
# /usr/local/bin/perl5.00404
|
||
|
|
# /usr/local/bin/tclsh8.0
|
||
|
|
# into dependencies with RPM version numbers.
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
# These have all been seen on our system or are "recommended" in
|
||
|
|
# various man pages.
|
||
|
|
|
||
|
|
# Examples:
|
||
|
|
|
||
|
|
# #!/bin/sh
|
||
|
|
# # the next line restarts using wish \
|
||
|
|
# exec wish "$0" "$@"
|
||
|
|
|
||
|
|
|
||
|
|
# #!/bin/sh -- # -*- perl -*- -p
|
||
|
|
# eval 'exec /usr/bin/perl -wS $0 ${1+"$@"}'
|
||
|
|
# if $running_under_some_shell;
|
||
|
|
|
||
|
|
|
||
|
|
# #!/bin/sh -- # -*- perl -*- -p
|
||
|
|
# eval '(exit $?0)' && eval 'exec /usr/bin/perl -wS $0 ${1+"$@"}'
|
||
|
|
|
||
|
|
|
||
|
|
# #!/bin/sh -- # -*- perl -*- -p
|
||
|
|
# & eval 'exec /usr/bin/perl -wS $0 $argv:q'
|
||
|
|
# if $running_under_some_shell;
|
||
|
|
|
||
|
|
|
||
|
|
# #! /usr/bin/env python
|
||
|
|
|
||
|
|
|
||
|
|
use File::Basename;
|
||
|
|
|
||
|
|
if ("@ARGV") {
|
||
|
|
foreach (@ARGV) {
|
||
|
|
process_file($_);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
|
||
|
|
# notice we are passed a list of filenames NOT as common in unix the
|
||
|
|
# contents of the file.
|
||
|
|
|
||
|
|
foreach (<>) {
|
||
|
|
process_file($_);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
foreach $prog (sort keys %require) {
|
||
|
|
|
||
|
|
|
||
|
|
# ignore variable interpolation and any program whose name is made
|
||
|
|
# up only of non word characters ('<', '&&', etc).
|
||
|
|
|
||
|
|
( ( $prog != /\$/ ) || ( $prog =~ /^\W+$/ ) ) &&
|
||
|
|
next;
|
||
|
|
|
||
|
|
# filenames of the form './miniperl' will be reported in canonical
|
||
|
|
# manner 'miniperl'
|
||
|
|
|
||
|
|
$prog =~ s!^\./!!;
|
||
|
|
|
||
|
|
if ( $prog !~ /\$/ ) {
|
||
|
|
print "exectuable($prog)\n";
|
||
|
|
}
|
||
|
|
|
||
|
|
$prog=basename($prog);
|
||
|
|
|
||
|
|
if ( $prog !~ /\$/ ) {
|
||
|
|
print "exectuable($prog)\n";
|
||
|
|
|
||
|
|
# get the correct version dependencies for magic numbers like:
|
||
|
|
# /usr/local/bin/perl5.00404
|
||
|
|
# /usr/local/bin/tclsh8.0
|
||
|
|
# these are always PACKAGE versions since typical executables do not
|
||
|
|
# have versions
|
||
|
|
|
||
|
|
my $version = "";
|
||
|
|
if ($module =~ s/([.0-9]+)$//) {
|
||
|
|
$version = "$1";
|
||
|
|
print "$prog>=$version\n";
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
exit 0;
|
||
|
|
|
||
|
|
|
||
|
|
sub process_file {
|
||
|
|
|
||
|
|
my ($file) = @_;
|
||
|
|
chomp $file;
|
||
|
|
|
||
|
|
my ($version, $magic) = ();
|
||
|
|
|
||
|
|
(-f $file) || return ;
|
||
|
|
|
||
|
|
open(FILE, "<$file")||
|
||
|
|
die("$0: Could not open file: '$file' : $!\n");
|
||
|
|
|
||
|
|
my $rc = sysread(FILE,$line,1000);
|
||
|
|
|
||
|
|
$rc =~ s/\#.*\n//g;
|
||
|
|
|
||
|
|
# Ignore all parameter substitution.
|
||
|
|
# I have no hope of parsing something like:
|
||
|
|
# exec ${SHELL:-/bin/sh}
|
||
|
|
$rc =~ s/\$\{.*\}//g;
|
||
|
|
$rc =~ s/echo\s+.*[\n;]//g;
|
||
|
|
|
||
|
|
if ( ($rc > 1) && ($line =~ m/^\#\!\s*/) ) {
|
||
|
|
|
||
|
|
if ($line =~ m/\b(exec|env)\s+([\'\"\`\\]+)?([^ \t\n\r]+)/) {
|
||
|
|
$require{$3} = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
# strip off extra lines and any arguments
|
||
|
|
if ($line =~ m/^\#\!\s*([^ \t\n\r]+)/) {
|
||
|
|
$require{$1} = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
close(FILE) ||
|
||
|
|
die("$0: Could not close file: '$file' : $!\n");
|
||
|
|
|
||
|
|
return ;
|
||
|
|
}
|