Archives and Compression

Compression Suffix

Choose an Output Name

Compression tools usually add a suffix to an archive name. A case statement can map a selected method to the output file name.

Program

Play the script to choose a compression method and see the resulting archive name.

compression_suffix.sh 
#!/usr/bin/env bash

method=
base="reports.tar"
case "$method" in
    gzip) output="${base}.gz" ;;
    xz) output="${base}.xz" ;;
    none) output="$base" ;;
esac
echo "$output"

#!/usr/bin/env bash

method=
base="reports.tar"
case "$method" in
    gzip) output="${base}.gz" ;;
    xz) output="${base}.xz" ;;
    none) output="$base" ;;
esac
echo "$output"

#!/usr/bin/env bash

method=
base="reports.tar"
case "$method" in
    gzip) output="${base}.gz" ;;
    xz) output="${base}.xz" ;;
    none) output="$base" ;;
esac
echo "$output"
case `case "$method" in` selects a branch by pattern.
suffix The chosen method controls the output suffix.
no compression The `none` branch keeps the original tar archive name.