instiki/vendor/bluecloth-1.0.0/utils.rb

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#
# Install/distribution utility functions
# $Id: utils.rb,v 1.1 2005/01/07 23:01:51 alexeyv Exp $
#
# Copyright (c) 2001-2004, The FaerieMUD Consortium.
#
# This is free software. You may use, modify, and/or redistribute this
# software under the terms of the Perl Artistic License. (See
# http://language.perl.com/misc/Artistic.html)
#
BEGIN {
require 'find'
begin
require 'readline'
include Readline
rescue LoadError => e
$stderr.puts "Faking readline..."
def readline( prompt )
$stderr.print prompt.chomp
return $stdin.gets.chomp
end
end
}
class File
Win32Exts = %w{.exe .com .bat}
def self::which( prog, path=ENV['PATH'] )
path.split(File::PATH_SEPARATOR).each {|dir|
# If running under Windows, look for prog + extensions
if File::ALT_SEPARATOR
ext = Win32Exts.find_all {|ext|
f = File::join(dir, prog+ext)
File::executable?(f) && !File::directory?(f)
}
ext.each {|f|
f = File::join( dir, prog + f ).gsub(%r:/:,'\\')
if block_given? then yield( f ) else return f end
}
else
f = File::join( dir, prog )
if File::executable?( f ) && ! File::directory?( f )
if block_given? then yield(f) else return f end
end
end
}
end
end
module UtilityFunctions
# The list of regexen that eliminate files from the MANIFEST
ANTIMANIFEST = [
/makedist\.rb/,
/\bCVS\b/,
/~$/,
/^#/,
%r{docs/html},
%r{docs/man},
/\bTEMPLATE\.\w+\.tpl\b/,
/\.cvsignore/,
/\.s?o$/,
]
AMRegexp = Regexp::union( *ANTIMANIFEST )
# Set some ANSI escape code constants (Shamelessly stolen from Perl's
# Term::ANSIColor by Russ Allbery <rra@stanford.edu> and Zenin <zenin@best.com>
AnsiAttributes = {
'clear' => 0,
'reset' => 0,
'bold' => 1,
'dark' => 2,
'underline' => 4,
'underscore' => 4,
'blink' => 5,
'reverse' => 7,
'concealed' => 8,
'black' => 30, 'on_black' => 40,
'red' => 31, 'on_red' => 41,
'green' => 32, 'on_green' => 42,
'yellow' => 33, 'on_yellow' => 43,
'blue' => 34, 'on_blue' => 44,
'magenta' => 35, 'on_magenta' => 45,
'cyan' => 36, 'on_cyan' => 46,
'white' => 37, 'on_white' => 47
}
ErasePreviousLine = "\033[A\033[K"
###############
module_function
###############
# Create a string that contains the ANSI codes specified and return it
def ansiCode( *attributes )
return '' unless /(?:vt10[03]|xterm(?:-color)?|linux)/i =~ ENV['TERM']
attr = attributes.collect {|a| AnsiAttributes[a] ? AnsiAttributes[a] : nil}.compact.join(';')
if attr.empty?
return ''
else
return "\e[%sm" % attr
end
end
# Test for the presence of the specified <tt>library</tt>, and output a
# message describing the test using <tt>nicename</tt>. If <tt>nicename</tt>
# is <tt>nil</tt>, the value in <tt>library</tt> is used to build a default.
def testForLibrary( library, nicename=nil )
nicename ||= library
message( "Testing for the #{nicename} library..." )
found = false
begin
require library
rescue LoadError => err
message "no found (%s)\n" % err.message
else
message "found\n"
found = true
end
return found
end
# Test for the presence of the specified <tt>library</tt>, and output a
# message describing the problem using <tt>nicename</tt>. If
# <tt>nicename</tt> is <tt>nil</tt>, the value in <tt>library</tt> is used
# to build a default. If <tt>raaUrl</tt> and/or <tt>downloadUrl</tt> are
# specified, they are also use to build a message describing how to find the
# required library. If <tt>fatal</tt> is <tt>true</tt>, a missing library
# will cause the program to abort.
def testForRequiredLibrary( library, nicename=nil, raaUrl=nil, downloadUrl=nil, fatal=true )
nicename ||= library
unless testForLibrary( library, nicename )
msgs = [ "You are missing the required #{nicename} library.\n" ]
msgs << "RAA: #{raaUrl}\n" if raaUrl
msgs << "Download: #{downloadUrl}\n" if downloadUrl
if fatal
abort msgs.join('')
else
errorMessage msgs.join('')
end
end
return true
end
### Output <tt>msg</tt> as a ANSI-colored program/section header (white on
### blue).
def header( msg )
msg.chomp!
$stderr.puts ansiCode( 'bold', 'white', 'on_blue' ) + msg + ansiCode( 'reset' )
$stderr.flush
end
### Output <tt>msg</tt> to STDERR and flush it.
def message( msg )
$stderr.print ansiCode( 'cyan' ) + msg + ansiCode( 'reset' )
$stderr.flush
end
### Output the specified <tt>msg</tt> as an ANSI-colored error message
### (white on red).
def errorMessage( msg )
message ansiCode( 'bold', 'white', 'on_red' ) + msg + ansiCode( 'reset' )
end
### Output the specified <tt>msg</tt> as an ANSI-colored debugging message
### (yellow on blue).
def debugMsg( msg )
return unless $DEBUG
msg.chomp!
$stderr.puts ansiCode( 'bold', 'yellow', 'on_blue' ) + ">>> #{msg}" + ansiCode( 'reset' )
$stderr.flush
end
### Erase the previous line (if supported by your terminal) and output the
### specified <tt>msg</tt> instead.
def replaceMessage( msg )
print ErasePreviousLine
message( msg )
end
### Output a divider made up of <tt>length</tt> hyphen characters.
def divider( length=75 )
puts "\r" + ("-" * length )
end
alias :writeLine :divider
### Output the specified <tt>msg</tt> colored in ANSI red and exit with a
### status of 1.
def abort( msg )
print ansiCode( 'bold', 'red' ) + "Aborted: " + msg.chomp + ansiCode( 'reset' ) + "\n\n"
Kernel.exit!( 1 )
end
### Output the specified <tt>promptString</tt> as a prompt (in green) and
### return the user's input with leading and trailing spaces removed.
def prompt( promptString )
promptString.chomp!
return readline( ansiCode('bold', 'green') + "#{promptString}: " + ansiCode('reset') ).strip
end
### Prompt the user with the given <tt>promptString</tt> via #prompt,
### substituting the given <tt>default</tt> if the user doesn't input
### anything.
def promptWithDefault( promptString, default )
response = prompt( "%s [%s]" % [ promptString, default ] )
if response.empty?
return default
else
return response
end
end
### Search for the program specified by the given <tt>progname</tt> in the
### user's <tt>PATH</tt>, and return the full path to it, or <tt>nil</tt> if
### no such program is in the path.
def findProgram( progname )
ENV['PATH'].split(File::PATH_SEPARATOR).each {|d|
file = File.join( d, progname )
return file if File.executable?( file )
}
return nil
end
### Using the CVS log for the given <tt>file</tt> attempt to guess what the
### next release version might be. This only works if releases are tagged
### with tags like 'RELEASE_x_y'.
def extractNextVersionFromTags( file )
message "Attempting to extract next release version from CVS tags for #{file}...\n"
raise RuntimeError, "No such file '#{file}'" unless File.exists?( file )
cvsPath = findProgram( 'cvs' ) or
raise RuntimeError, "Cannot find the 'cvs' program. Aborting."
output = %x{#{cvsPath} log #{file}}
release = [ 0, 0 ]
output.scan( /RELEASE_(\d+)_(\d+)/ ) {|match|
if $1.to_i > release[0] || $2.to_i > release[1]
release = [ $1.to_i, $2.to_i ]
replaceMessage( "Found %d.%02d...\n" % release )
end
}
if release[1] >= 99
release[0] += 1
release[1] = 1
else
release[1] += 1
end
return "%d.%02d" % release
end
### Write a new manifest file with the given +named+, moving any current one
### aside with an ".old" suffix if +backup+ is true.
def makeManifest( name="MANIFEST", backup=true )
message "Making manifest file '#{name}'"
# Move an old one aside if a backup is desired
if backup and File::exists?( name )
File::rename( name, name + ".old" )
end
File::open( name, File::WRONLY|File::TRUNC|File::CREAT ) {|ofh|
Find::find( "." ) do |file|
Find.prune if AMRegexp =~ file
Find.prune if %r{/\.} =~ file
Find.prune if /TEMPLATE/ =~ file
next if File::directory?( file )
ofh.puts file
end
}
end
### Read the specified <tt>manifestFile</tt>, which is a text file
### describing which files to package up for a distribution. The manifest
### should consist of one or more lines, each containing one filename or
### shell glob pattern.
def readManifest( manifestFile="MANIFEST" )
message "Reading manifest..."
raise "Missing #{manifestFile}, please remake it" unless File.exists? manifestFile
manifest = IO::readlines( manifestFile ).collect {|line|
line.chomp
}.select {|line|
line !~ /^(\s*(#.*)?)?$/
}
filelist = []
for pat in manifest
$stderr.puts "Adding files that match '#{pat}' to the file list" if $VERBOSE
filelist |= Dir.glob( pat ).find_all {|f| FileTest.file?(f)}
end
message "found #{filelist.length} files.\n"
return filelist
end
### Given a <tt>filelist</tt> like that returned by #readManifest, remove
### the entries therein which match the Regexp objects in the given
### <tt>antimanifest</tt> and return the resultant Array.
def vetManifest( filelist, antimanifest=ANITMANIFEST )
origLength = filelist.length
message "Vetting manifest..."
for regex in antimanifest
if $VERBOSE
message "\n\tPattern /#{regex.source}/ removed: " +
filelist.find_all {|file| regex.match(file)}.join(', ')
end
filelist.delete_if {|file| regex.match(file)}
end
message "removed #{origLength - filelist.length} files from the list.\n"
return filelist
end
### Combine a call to #readManifest with one to #vetManifest.
def getVettedManifest( manifestFile="MANIFEST", antimanifest=ANTIMANIFEST )
vetManifest( readManifest(manifestFile), antimanifest )
end
### Given a documentation <tt>catalogFile</tt>, extract the title, if
### available, and return it. Otherwise generate a title from the name of
### the CVS module.
def findRdocTitle( catalogFile="docs/CATALOG" )
# Try extracting it from the CATALOG file from a line that looks like:
# Title: Foo Bar Module
title = findCatalogKeyword( 'title', catalogFile )
# If that doesn't work for some reason, try grabbing the name of the CVS
# repository the directory belongs to.
if title.nil? && File::directory?( "CVS" ) &&
File::exists?( "CVS/Repository" )
title = File::read( "CVS/Repository" ).chomp
end
# As a last resort, use the name of the project directory
if title.nil?
distdir = File::dirname( __FILE__ )
distdir = File::dirname( distdir ) if /docs$/ =~ distdir
title = File::basename( distdir )
end
return title
end
### Given a documentation <tt>catalogFile</tt>, extract the name of the file
### to use as the initally displayed page. If extraction fails, the
### +default+ will be used if it exists. Returns +nil+ if there is no main
### file to be found.
def findRdocMain( catalogFile="docs/CATALOG", default="README" )
# Try extracting it from the CATALOG file from a line that looks like:
# Main: Foo Bar Module
main = findCatalogKeyword( 'main', catalogFile )
# Try to make some educated guesses if that doesn't work
if main.nil?
basedir = File::dirname( __FILE__ )
basedir = File::dirname( basedir ) if /docs$/ =~ basedir
if File::exists?( File::join(basedir, default) )
main = default
end
end
return main
end
### Given a documentation <tt>catalogFile</tt>, extract an upload URL for
### RDoc.
def findRdocUpload( catalogFile="docs/CATALOG" )
findCatalogKeyword( 'upload', catalogFile )
end
### Given a documentation <tt>catalogFile</tt>, extract a CVS web frontend
### URL for RDoc.
def findRdocCvsURL( catalogFile="docs/CATALOG" )
findCatalogKeyword( 'webcvs', catalogFile )
end
### Given a documentation <tt>catalogFile</tt>, try extracting the given
### +keyword+'s value from it. Keywords are lines that look like:
### # <keyword>: <value>
### Returns +nil+ if the catalog file was unreadable or didn't contain the
### specified +keyword+.
def findCatalogKeyword( keyword, catalogFile="docs/CATALOG" )
val = nil
if File::exists? catalogFile
message "Extracting '#{keyword}' from CATALOG file (%s).\n" % catalogFile
File::foreach( catalogFile ) {|line|
debugMsg( "Examining line #{line.inspect}..." )
val = $1.strip and break if /^#\s*#{keyword}:\s*(.*)$/i =~ line
}
end
return val
end
### Given a documentation <tt>catalogFile</tt>, which is in the same format
### as that described by #readManifest, read and expand it, and then return
### a list of those files which appear to have RDoc documentation in
### them. If <tt>catalogFile</tt> is nil or does not exist, the MANIFEST
### file is used instead.
def findRdocableFiles( catalogFile="docs/CATALOG" )
startlist = []
if File.exists? catalogFile
message "Using CATALOG file (%s).\n" % catalogFile
startlist = getVettedManifest( catalogFile )
else
message "Using default MANIFEST\n"
startlist = getVettedManifest()
end
message "Looking for RDoc comments in:\n" if $VERBOSE
startlist.select {|fn|
message " #{fn}: " if $VERBOSE
found = false
File::open( fn, "r" ) {|fh|
fh.each {|line|
if line =~ /^(\s*#)?\s*=/ || line =~ /:\w+:/ || line =~ %r{/\*}
found = true
break
end
}
}
message( (found ? "yes" : "no") + "\n" ) if $VERBOSE
found
}
end
### Open a file and filter each of its lines through the given block a
### <tt>line</tt> at a time. The return value of the block is used as the
### new line, or omitted if the block returns <tt>nil</tt> or
### <tt>false</tt>.
def editInPlace( file ) # :yields: line
raise "No block specified for editing operation" unless block_given?
tempName = "#{file}.#{$$}"
File::open( tempName, File::RDWR|File::CREAT, 0600 ) {|tempfile|
File::unlink( tempName )
File::open( file, File::RDONLY ) {|fh|
fh.each {|line|
newline = yield( line ) or next
tempfile.print( newline )
}
}
tempfile.seek(0)
File::open( file, File::TRUNC|File::WRONLY, 0644 ) {|newfile|
newfile.print( tempfile.read )
}
}
end
### Execute the specified shell <tt>command</tt>, read the results, and
### return them. Like a %x{} that returns an Array instead of a String.
def shellCommand( *command )
raise "Empty command" if command.empty?
cmdpipe = IO::popen( command.join(' '), 'r' )
return cmdpipe.readlines
end
### Execute a block with $VERBOSE set to +false+, restoring it to its
### previous value before returning.
def verboseOff
raise LocalJumpError, "No block given" unless block_given?
thrcrit = Thread.critical
oldverbose = $VERBOSE
begin
Thread.critical = true
$VERBOSE = false
yield
ensure
$VERBOSE = oldverbose
Thread.critical = false
end
end
### Try the specified code block, printing the given
def try( msg, bind=nil )
result = nil
if msg =~ /^to\s/
message = "Trying #{msg}..."
else
message = msg
end
begin
rval = nil
if block_given?
rval = yield
else
file, line = caller(1)[0].split(/:/,2)
rval = eval( msg, bind, file, line.to_i )
end
result = rval.inspect
rescue Exception => err
if err.backtrace
nicetrace = err.backtrace.delete_if {|frame|
/in `(try|eval)'/ =~ frame
}.join("\n\t")
else
nicetrace = "Exception had no backtrace"
end
result = err.message + "\n\t" + nicetrace
ensure
puts result
end
end
def time
start = Time::now
stimes = Process::times
rval = yield
etimes = Process::times
$stderr.puts "Time elapsed: %0.5f user, %0.5f system (%0.5f wall clock seconds)" % [
etimes.utime - stimes.utime,
etimes.stime - stimes.stime,
Time::now.to_f - start.to_f,
]
return rval
end
end