305 lines
8.3 KiB
Perl
305 lines
8.3 KiB
Perl
#!/usr/bin/env perl
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# pltags - create a tags file for Perl code, for use by vi(m)
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#
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# Distributed with Vim <http://www.vim.org/>, latest version always available
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# at <http://www.mscha.com/mscha.html?pltags#tools>
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#
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# Version 2.3, 28 February 2002
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#
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# Written by Michael Schaap <pltags@mscha.com>. Suggestions for improvement
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# are very welcome!
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#
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# This script will not work with Perl 4 or below!
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#
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# Revision history:
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# 1.0 1997? Original version, quickly hacked together
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# 2.0 1999? Completely rewritten, better structured and documented,
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# support for variables, packages, Exuberant Ctags extensions
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# 2.1 Jun 2000 Fixed critical bug (typo in comment) ;-)
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# Support multiple level packages (e.g. Archive::Zip::Member)
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# 2.2 Jul 2001 'Glob' wildcards - especially useful under Windows
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# (thanks to Serge Sivkov and Jason King)
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# Bug fix: reset package name for each file
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# 2.21 Jul 2001 Oops... bug in variable detection (/local../ -> /^local.../)
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# 2.3 Feb 2002 Support variables declared with "our"
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# (thanks to Lutz Mende)
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# Complain about undeclared variables
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use strict;
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# Used modules
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use Getopt::Long;
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# Options with their defaults
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my $do_subs = 1; # --subs, --nosubs include subs in tags file?
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my $do_vars = 1; # --vars, --novars include variables in tags file?
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my $do_pkgs = 1; # --pkgs, --nopkgs include packages in tags file?
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my $do_exts = 1; # --extensions, --noextensions
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# include Exuberant Ctags extensions
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# Global variables
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my $VERSION = "2.21"; # pltags version
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my $status = 0; # GetOptions return value
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my $file = ""; # File being processed
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my @tags = (); # List of produced tags
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my $is_pkg = 0; # Are we tagging a package?
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my $has_subs = 0; # Has this file any subs yet?
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my $package_name = ""; # Name of current package
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my $var_continues = 0; # Variable declaration continues on last line
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my $line = ""; # Current line in file
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my $stmt = ""; # Current Perl statement
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my @vars = (); # List of variables in declaration
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my $var = ""; # Variable in declaration
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my $tagline = ""; # Tag file line
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# Create a tag file line and push it on the list of found tags
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sub MakeTag($$$$$)
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{
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my ($tag, # Tag name
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$type, # Type of tag
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$is_static, # Is this a static tag?
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$file, # File in which tag appears
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$line) = @_; # Line in which tag appears
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my $tagline = ""; # Created tag line
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# Only process tag if not empty
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if ($tag)
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{
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# Get rid of \n, and escape / and \ in line
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chomp $line;
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$line =~ s/\\/\\\\/g;
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$line =~ s/\//\\\//g;
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# Create a tag line
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$tagline = "$tag\t$file\t/^$line\$/";
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# If we're told to do so, add extensions
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if ($do_exts)
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{
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$tagline .= ";\"\t$type"
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. ($is_static ? "\tfile:" : "")
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. ($package_name ? "\tclass:$package_name" : "");
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}
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# Push it on the stack
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push (@tags, $tagline);
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}
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}
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# Parse package name from statement
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sub PackageName($)
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{
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my ($stmt) = @_; # Statement
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# Look for the argument to "package". Return it if found, else return ""
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if ($stmt =~ /^package\s+([\w:]+)/)
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{
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my $pkgname = $1;
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# Remove any parent package name(s)
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$pkgname =~ s/.*://;
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return $pkgname;
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}
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else
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{
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return "";
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}
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}
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# Parse sub name from statement
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sub SubName($)
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{
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my ($stmt) = @_; # Statement
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# Look for the argument to "sub". Return it if found, else return ""
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if ($stmt =~ /^sub\s+([\w:]+)/)
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{
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my $subname = $1;
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# Remove any parent package name(s)
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$subname =~ s/.*://;
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return $subname;
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}
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else
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{
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return "";
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}
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}
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# Parse all variable names from statement
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sub VarNames($)
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{
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my ($stmt) = @_;
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# Remove my or local from statement, if present
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$stmt =~ s/^(my|our|local)\s+//;
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# Remove any assignment piece
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$stmt =~ s/\s*=.*//;
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# Now find all variable names, i.e. "words" preceded by $, @ or %
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@vars = ($stmt =~ /[\$\@\%]([\w:]+)\b/g);
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# Remove any parent package name(s)
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map(s/.*://, @vars);
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return (@vars);
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}
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sub functionNoParentheses {
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return 1
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}
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############### Start ###############
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print "\npltags $VERSION by Michael Schaap <mscha\@mscha.com>\n\n";
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# Get options
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$status = GetOptions("subs!" => \$do_subs,
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"vars!" => \$do_vars,
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"pkgs!" => \$do_pkgs,
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"extensions!" => \$do_exts);
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# Usage if error in options or no arguments given
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unless ($status && @ARGV)
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{
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print "\n" unless ($status);
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print " Usage: $0 [options] filename ...\n\n";
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print " Where options can be:\n";
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print " --subs (--nosubs) (don't) include sub declarations in tag file\n";
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print " --vars (--novars) (don't) include variable declarations in tag file\n";
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print " --pkgs (--nopkgs) (don't) include package declarations in tag file\n";
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print " --extensions (--noextensions)\n";
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print " (don't) include Exuberant Ctags / Vim style\n";
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print " extensions in tag file\n\n";
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print " Default options: ";
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print ($do_subs ? "--subs " : "--nosubs ");
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print ($do_vars ? "--vars " : "--novars ");
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print ($do_pkgs ? "--pkgs " : "--nopkgs ");
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print ($do_exts ? "--extensions\n\n" : "--noextensions\n\n");
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print " Example: $0 *.pl *.pm ../shared/*.pm\n\n";
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exit;
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}
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# Loop through files on command line - 'glob' any wildcards, since Windows
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# doesn't do this for us
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foreach $file (map { glob } @ARGV)
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{
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# Skip if this is not a file we can open. Also skip tags files and backup
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# files
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next unless ((-f $file) && (-r $file) && ($file !~ /tags$/)
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&& ($file !~ /~$/));
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print "Tagging file $file...\n";
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$is_pkg = 0;
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$package_name = "";
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$has_subs = 0;
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$var_continues = 0;
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open (IN, $file) or die "Can't open file '$file': $!";
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# Loop through file
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foreach $line (<IN>)
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{
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# Statement is line with comments and whitespace trimmed
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($stmt = $line) =~ s/#.*//;
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$stmt =~ s/^\s*//;
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$stmt =~ s/\s*$//;
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# Nothing left? Never mind.
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next unless ($stmt);
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# This is a variable declaration if one was started on the previous
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# line, or if this line starts with my or local
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if ($var_continues or ($stmt =~/^my\b/)
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or ($stmt =~/^our\b/) or ($stmt =~/^local\b/))
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{
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# The declaration continues if the line does not end with ;
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$var_continues = ($stmt !~ /;$/);
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# Loop through all variable names in the declaration
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foreach $var (VarNames($stmt))
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{
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# Make a tag for this variable unless we're told not to. We
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# assume that a variable is always static, unless it appears
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# in a package before any sub. (Not necessarily true, but
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# it's ok for most purposes and Vim works fine even if it is
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# incorrect)
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if ($do_vars)
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{
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MakeTag($var, "v", (!$is_pkg or $has_subs), $file, $line);
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}
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}
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}
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# This is a package declaration if the line starts with package
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elsif ($stmt =~/^package\b/)
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{
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# Get name of the package
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$package_name = PackageName($stmt);
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if ($package_name)
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{
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# Remember that we're doing a package
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$is_pkg = 1;
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# Make a tag for this package unless we're told not to. A
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# package is never static.
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if ($do_pkgs)
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{
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MakeTag($package_name, "p", 0, $file, $line);
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}
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}
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}
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# This is a sub declaration if the line starts with sub
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elsif ($stmt =~/^sub\b/)
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{
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# Remember that this file has subs
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$has_subs = 1;
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# Make a tag for this sub unless we're told not to. We assume
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# that a sub is static, unless it appears in a package. (Not
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# necessarily true, but it's ok for most purposes and Vim works
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# fine even if it is incorrect)
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if ($do_subs)
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{
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MakeTag(SubName($stmt), "s", (!$is_pkg), $file, $line);
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}
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}
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}
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close (IN);
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}
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# Do we have any tags? If so, write them to the tags file
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if (@tags)
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{
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# Add some tag file extensions if we're told to
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if ($do_exts)
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{
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push (@tags, "!_TAG_FILE_FORMAT\t2\t/extended format/");
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push (@tags, "!_TAG_FILE_SORTED\t1\t/0=unsorted, 1=sorted/");
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push (@tags, "!_TAG_PROGRAM_AUTHOR\tMichael Schaap\t/mscha\@mscha.com/");
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push (@tags, "!_TAG_PROGRAM_NAME\tpltags\t//");
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push (@tags, "!_TAG_PROGRAM_VERSION\t$VERSION\t/supports multiple tags and extended format/");
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}
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print "\nWriting tags file.\n";
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open (OUT, ">tags") or die "Can't open tags file: $!";
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foreach $tagline (sort @tags)
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{
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print OUT "$tagline\n";
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}
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close (OUT);
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}
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else
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{
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print "\nNo tags found.\n";
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}
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