beginner here. I want to write a simple script for use in the bash terminal, but I don't know how to make it. The gist is that I have a folder filled with different files, some .foo, some .bar, etc. I want to create a script that takes all the .foo files and perform a command on them, but in the same line rename them so that the output file is named file.baz.
For example: command -i file.foo -o file.baz for all .foo files in a directory.
You can use the rename command:
$ rename .foo .baz *.foo
Note that on some systems rename points to prename which uses a different syntax:
$ prename 's/.foo$/.baz' *.foo
Use man rename to find out which one you have.
You can provide the file list directly on the command line, using a globbing pattern:
$ your_script *.foo
Your script can then iterate over the list like this (using your command's usage):
for file in "$@"; do
your_command -i "$file" -o "${file%.*}.baz"
done
${file%.*} resolves as the name of the file without its extension (file.foo -> file). More information on string manipulation is available here.
for command in "$@", of course, my bad. I didn't know about the command built-in, will look into it, thanks
for file in *.foo; do your_command -i "$file" -o "${file%.foo}.baz"; done or such.