Convert file encodings

Here's to a new bit of code!

I wrote this program once, called Tester, which my dad is using in his day-to-day language teaching.

I wrote the thing quite a long time ago, so it's a bit buggy here and there, and one of the problems is that it doesn't handle encodings well. Since dad is thinking about using Ubuntu, the mishandled encodings are a problem: he used to have them encoded as WINDOWS-1250, but the current settings allow him to use only UTF-8 on Ubuntu.

Hence, this program, to convert between the two. Since the files come in bulk, I figured doing entire directories at once is a good idea.

Also, I wrote it in about an hour and a bit, so it might be a bit buggy here and there...

Here's the code:

1 #!/bin/bash
2 
3 # Convert directory 
4 #
5 # Convert text files in the directory from one encoding to another,
6 # all in a simple GUI. Converts between UTF-8 and WINDOWS-1250.
7 # 
8 # Requires:
9 #   zenity
10#   iconv
11# Author:
12#   Konrad Siek
13
14
15# Get directory to convert files in
16directory=$(\
17    zenity \
18    --file-selection \
19    --directory \
20    --title="Select a directory to convert" \
21)
22
23# If none selected, quit.
24if [ $? != 0 ] 
25then
26    exit 1
27fi
28
29# Select source encoding from a list.
30source_encoding=$(\
31    zenity --list \
32    --column="Encoding" \
33    --title="Source encoding" \
34    --text="The files are currently encoded as... " \
35    WINDOWS-1250 UTF-8 \
36)
37
38# If none selected, quit.
39if [ $? != 0 ] 
40then
41    exit 1
42fi
43
44# Select destination encoding from a list.
45destination_encoding=$(\
46    zenity --list \
47    --column="Encoding" \
48    --title="Destination encoding" \
49    --text="And you want these files encoded as... " \
50    UTF-8 WINDOWS-1250 \
51)
52
53# If none selected, quit.
54if [ $? != 0 ] 
55then
56    exit 1
57fi 
58
59# For all files in the selected directory...
60find "$directory" -type f | while read f
61do 
62    # Get information about the file.
63    extension=${f#*.}
64    basename=$(basename "$f" ".$extension")
65    addition=$(echo "$destination_encoding" | tr -d - | tr [A-Z] [a-z])
66    output="$directory/$basename.$addition.$extension"
67    
68    # Convert encoding.
69    iconv \
70        --from-code="$source_encoding" \
71        --to-code="$destination_encoding" \
72        --output="$output" \
73        "$f"
74
75    echo "Created $directory/$basename.$addition.$extension"
76done
77
78# Notify on finish
79zenity --info --text="Operation complete." --title="Complete"
80

The code is also available at GitHub as bash/convert_directory.