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#! /usr/bin/env texlua
--
-- global constants
--
VERSION = "0.9.3"
FILE_SUFFIX = "_chtr"
PMX_CMD = "pmxab"
--[[
pmxchords.lua: transpose chords (\ch.C.\) and process pmxab
(c) Copyright 2013 Ondrej Fafejta <fafejtao@gmail.com>
https://github.com/fafejtao/pmxChords
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
--]]
--[[
ChangeLog:
version 0.9.3 2014-04-21 - fixed transposition problem:
If song began in E-minor and signature is changed in half of song to A-minor
transposition must be omitted.
version 0.9.2 2013-12-13 - fixed: stop processing when pmxab fail.
- When pmxab is called generated file pmxaerr.dat is not removed.
version 0.9.1 2013-12-09 - added some options. Improved processing.
version 0.9 2013-12-05 - rewritted code from perl to lua...
--]]
function usage()
print("Usage: [texlua] pmxchords.lua basename[.pmx] ")
print(" 1. transpose chords into new file basename" .. FILE_SUFFIX .. ".pmx")
print(" 2. call pmxab on transposed file basename" .. FILE_SUFFIX .. ".pmx")
print(" 3. rename basename" .. FILE_SUFFIX .. ".tex to basename.tex")
print("options: -v version")
print(" -h help")
print(" -s stop after fist step. e.g. generate only transposed basename" .. FILE_SUFFIX .. ".pmx file")
end
function whoami()
print("This is pmxchords.lua version " .. VERSION)
end
whoami()
if #arg == 0 then
usage()
os.exit(0)
end
kpse.set_program_name("luatex")
require"ChordsTr"
function parseInputSignature(line)
-- parse input signature from pmx digits line. Only one line digits format is supported!
-- e.g.
-- 1 1 2 4 2 4 0 -1
-- signature is -1 : F major
local res = string.match(line, "^%s*[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+[0-9]+%s+([%+%-]?[0-9]+)%s*$")
return tonumber(res)
end
function parseOutputSignature(line)
-- parse output signature from pmx
-- e.g.
-- K-2+2
-- output signature is +2 : D major
local res = string.match(line, "^K[%+%-]?[0-9]+([%+%-]?[0-9]+)")
return tonumber(res)
end
--
-- Strip comments from line
-- Comments begin with % character
--
function lineWithoutComment(line)
local i = string.find(line, "%%")
if (i == nil) then
return line
end
return line:sub(0, i - 1)
end
--
-- Function checks only if the line contains \ch. string.
-- It does not check correctly if notes already started. It checks only if chords started..
-- Scenario bellow will fail!
-- d44 f a r / % first line does not contain chords symbol
-- % signature is changed
-- K+0+0
-- \ch.C.\ c44 e g r4 /
--
function checkChordsAlreadyStarted(line)
local i = string.find(lineWithoutComment(line), ChordsTr.CHORDS_BEGIN)
if (i ~= nil) then
return true
end
return false;
end
function handleErr(msg)
io.stderr:write(msg .. "\n")
os.exit(2)
end
--
-- get file name without .pmx suffix
--
function getBaseFileName(fileName)
if fileName ~= "" and string.sub(fileName, -4, -1) == ".pmx" then
return string.sub(fileName, 1, -5)
else
return fileName
end
end
--
-- Make chords transposition. Generates new pmx file with transposed chords.
--
-- param baseName input file name without .pmx suffix
-- return outputBaseName transposed pmx file name without .pmx suffix
--
function makeChordsTransposition(baseName)
local inputFileName = baseName .. ".pmx"
local inputFile = io.open(inputFileName, "r")
if (inputFile == nil) then
handleErr("File does not exist: " .. inputFileName)
end
local outputBaseName = baseName .. FILE_SUFFIX -- output base name without suffix. Used for renaming generated .tex file ...
local outputFileName = outputBaseName .. ".pmx"
local outputFile = io.open(outputFileName, "w")
if (outputFile == nil) then
handleErr("Can not create temporary file: " .. outputFileName)
end
--
-- transpose chords from inputFile into outputFile
--
-- input and output signature will be parsed from input pmx file
--
local iSig = nil -- input signature
local chTr = nil -- chords transposition class
-- If song began in E-minor and signature is changed in half of song to A-minor
-- transposition must be omitted.
local chordsAlreadyStarted = false;
for line in inputFile:lines() do
if (chTr ~= nil) then
outputFile:write(chTr:lineTranspose(line) .. "\n")
else
outputFile:write(line .. "\n")
end
if (iSig == nil) then
iSig = parseInputSignature(line)
if (iSig ~= nil) then
io.stderr:write("Chords: input signature detected: " .. iSig .. "\n")
end
elseif (chTr == nil and not chordsAlreadyStarted) then
local oSig = parseOutputSignature(line)
if (oSig ~= nil) then
io.stderr:write("Chords: output signature detected: " .. oSig .. "\n")
chTr = ChordsTr(iSig, oSig)
elseif (checkChordsAlreadyStarted(line)) then
io.stderr:write("Chords: notes already started. Chords transposition is omitted.\n")
chordsAlreadyStarted = true;
end
end
end
inputFile:close()
outputFile:close()
return outputBaseName
end
--
-- Make pmxab process.
-- param baseName input file name without .pmx suffix
-- param outputBaseName transposed pmx file name without .pmx suffix
--
function pmxabProcess(baseName, outputBaseName)
--
-- call pmxab to generate .tex file
--
os.execute(PMX_CMD .. " " .. outputBaseName)
-- check error
local pmxaerr = io.open("pmxaerr.dat", "r")
if (not pmxaerr) then
handleErr("No log file.")
end
local linebuf = pmxaerr:read()
local err = tonumber(linebuf)
pmxaerr:close()
if (err ~= 0) then
handleErr("PMX process fail! " .. outputBaseName .. ".pmx")
end
os.rename(outputBaseName .. ".tex", baseName .. ".tex")
-- remove temporary files
os.remove(outputBaseName .. ".pmx")
os.remove(outputBaseName .. ".pml")
end
narg = 1
onlyTranspose = false
repeat
local this_arg = arg[narg]
if this_arg == "-v" then
os.exit(0)
elseif this_arg == "-h" then
usage()
os.exit(0)
elseif this_arg == "-s" then
onlyTranspose = true
else
local baseName = getBaseFileName(this_arg)
local outputBaseName = makeChordsTransposition(baseName)
if (onlyTranspose) then
os.exit(0)
end
pmxabProcess(baseName, outputBaseName)
end
narg = narg + 1
until narg > #arg
|
