From 4e1dcca4b2f4b08ebdb70667a26fb0a0595f3ea4 Mon Sep 17 00:00:00 2001
From: Alexandre Dupas <alexandre.dupas@gmail.com>
Date: Tue, 8 Dec 2009 00:28:13 +0100
Subject: [PATCH] Add utility to produce a well formated tex document
 containing all chords used in songs indexed by chords names and chords
 positions.

---
 utils/songbook-gtab.py | 83 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100755 utils/songbook-gtab.py

diff --git a/utils/songbook-gtab.py b/utils/songbook-gtab.py
new file mode 100755
index 00000000..3a67355c
--- /dev/null
+++ b/utils/songbook-gtab.py
@@ -0,0 +1,83 @@
+#!/usr/bin/python
+# 
+
+import sys
+import glob
+import re
+from optparse import OptionParser
+
+# Pattern set to ignore latex command in title prefix
+gtabPattern = re.compile(r"\\gtab\{(.*)\}\{(.*)\}");
+
+def main():
+    usage = "usage: %prog [options]"
+    parser = OptionParser(usage)
+    parser.add_option("-o", "--output", dest="filename",
+                      help="write result into FILE", metavar="FILE")
+    (options, args) = parser.parse_args()
+
+    # Options processing
+    if options.filename:
+        output = open(options.filename,"w")
+    else:
+        output = sys.stdout
+
+    # Actual processing
+    chords = dict()
+    positions = dict()
+
+    songfiles = glob.glob('songs/*/*.sg')
+    
+    for file in songfiles:
+        for line in open(file):
+            result = gtabPattern.match(line)
+            if result:
+                (chord,position) = result.groups()
+                if not chords.has_key(chord):
+                    chords[chord] = set()
+                chords[chord].add(position)
+                if not positions.has_key(position):
+                    positions[position] = set()
+                positions[position].add(chord)
+
+    document = [
+        '\\documentclass{article}',        
+        '\\usepackage[chorded]{songs}',
+        '\\usepackage[utf8]{inputenc}',
+        '\\title{Accords}',
+        '\\author{Romain Goffe \\and Alexandre Dupas}',
+        '\\date{}',
+        '\\begin{document}',
+        '\\maketitle',
+        '\\begin{songs}{}', 
+        ]
+
+    document.append('\\section{Chords names}')
+
+    chordskeys = chords.keys()
+    chordskeys.sort()
+
+    for k in chordskeys:
+        document.append('\\subsection{'+k.replace('#','\\#').replace('&','\\&')+'}')
+        for p in chords[k]:
+            document.append('\\gtab{'+k+'}{'+p+'}')
+
+    document.append('\\section{Chords names}')
+
+    positionskeys = positions.keys()
+    positionskeys.sort()
+
+    for k in positionskeys:
+        document.append('\\subsection{'+k+'}')
+        for p in positions[k]:
+            document.append('\\gtab{'+p+'}{'+k+'}')
+
+    document.extend([
+            '\\end{songs}',
+            '\\end{document}',
+            ])
+
+    output.write('\n'.join(document))
+
+if __name__ == '__main__':
+    main()