Problema ao executar filtro pandoc_abnt no Windows #143

Ao executar o pandoc_abnt filter no Windows é necessário invocar o filtro passando o caminho completo do arquivo BAT.

PANDOC_ABNT_BAT deve ser configurado para funcionar no Windows.

lib/limarka/conversor.rb

@@ -24,6 +24,8 @@ class Conversor
     attr_accessor :txt
     attr_accessor :usa_pdftotext
 
+    PANDOC_ABNT_PATH = ENV["PANDOC_ABNT_PATH"] or "pandoc_abnt"
+
     # @param trabalho [Trabalho]
     def initialize(trabalho, options)
       self.t = trabalho
@@ -87,7 +89,7 @@ def pretextual(tempfile)
       "epigrafe", "resumo", "abstract", "lista_ilustracoes", "lista_tabelas", 
       "lista_siglas", "lista_simbolos", "sumario"].each_with_index do |secao,indice|
         template = "pretextual#{indice+1}-#{secao}"
-        Open3.popen3("pandoc -f markdown \"--data-dir=#{options[:templates_dir]}\" --template=#{template} -t latex --filter pandoc_abnt") {|stdin, stdout, stderr, wait_thr|
+        Open3.popen3("pandoc -f markdown \"--data-dir=#{options[:templates_dir]}\" --template=#{template} -t latex --filter #{PANDOC_ABNT_PATH}") {|stdin, stdout, stderr, wait_thr|
           stdin.write(hash_to_yaml(t.configuracao))
           stdin.write("\n")
           if t.errata? and necessita_de_arquivo_de_texto.include?(secao) then
@@ -174,7 +176,7 @@ def secao_indice
 
     def textual(pretextual_tempfile, postextual_tempfile)
       valida_yaml
-      Open3.popen3("pandoc -f markdown+raw_tex -t latex -s \"--data-dir=#{options[:templates_dir]}\" --template=trabalho-academico --normalize --top-level-division=chapter --include-before-body=#{pretextual_tempfile.path}  --include-after-body=#{postextual_tempfile.path} --filter pandoc_abnt") {|stdin, stdout, stderr, wait_thr|
+      Open3.popen3("pandoc -f markdown+raw_tex -t latex -s \"--data-dir=#{options[:templates_dir]}\" --template=trabalho-academico --normalize --top-level-division=chapter --include-before-body=#{pretextual_tempfile.path}  --include-after-body=#{postextual_tempfile.path} --filter #{PANDOC_ABNT_PATH}") {|stdin, stdout, stderr, wait_thr|
         stdin.write(File.read(options[:templates_dir] + '/templates/configuracao-tecnica.yaml'))
         stdin.write("\n")
         stdin.write(hash_to_yaml(t.configuracao))
@@ -240,7 +242,7 @@ def self.tex_file(configuracao)
     def secao(template, condicao_para_conteudo, conteudo_externo)
       s = StringIO.new
 
-      Open3.popen3("pandoc -f markdown \"--data-dir=#{options[:templates_dir]}\" --template=#{template} --top-level-division=chapter -t latex --filter pandoc_abnt") {|stdin, stdout, stderr, wait_thr|
+      Open3.popen3("pandoc -f markdown \"--data-dir=#{options[:templates_dir]}\" --template=#{template} --top-level-division=chapter -t latex --filter #{PANDOC_ABNT_PATH}") {|stdin, stdout, stderr, wait_thr|
         stdin.write(hash_to_yaml(t.configuracao))
         stdin.write("\n")
         if (condicao_para_conteudo) then