1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
#!/bin/sh
# untar
# =====
# Usage: untar FILE [OPTIONS]
#
# Uncompress a tarball. Expects standardized file names (i.e., '.tar.gz.gpg')
help_msg() {
cat <<-EOF
Uncompress a tarball
Usage: untar FILE [OPTIONS]
Options:
-h, --help: print this message
EOF
exit 1
}
err_msg() {
# Takes one argument:
# error message
(>&2 echo "$1")
exit 1
}
gpg_then_tar() {
# Takes two arguments:
# path to target file
# tar options
TEMP=$(basename "$1" ".gpg")
gpg -o "$TEMP" -d "$1" || err_msg "Failed to decrypt '${1}'"
tar "${2}" "$TEMP"
}
for i in "$@"; do
case $i in
-h|--help) help_msg;;
esac
done
if [ "$#" -lt 1 ]; then
err_msg "Usage: untar FILE [OPTIONS]"
elif ! test -f "$1"; then
err_msg "No file '${1}'"
exit
fi
case "$1" in
*.tar) tar -xvf "$1";;
*.tar.gz) tar -xzvf "$1";;
*.tar.gz.gpg) gpg_then_tar "$1" "-xzvf";;
*.tar.bz2) tar -xjvf "$1";;
*.tar.bz2.gpg) gpg_then_tar "$1" "-xjvf";;
*.tar.xz) tar -xJvf "$1";;
*.tar.xz.gpg) gpg_then_tar "$1" "-xJvf";;
*.tar.zst) tar --zstd -xvf "$1";;
*.tar.zst.gpg) gpg_then_tar "$1" "--zstd -xvf";;
*) err_msg "Not a known file extension '${1}'"
esac