Goal
Sometimes you want to run a long running process without feedback. PV is a tool that allows you to do just that.
Example
- Running a mysqldump
mysqldump <yourparams> | pv --progress --size 100m > /tmp/dump.sql - Importing a mysql dump
pv dump.sql | mysql <yourparams> - Copying a large file
pv /originallocation/largefile.bin > /otherlocation/largefile.bin - Create a zip file
pv largefile.txt | zip > largefile.zip - Create a tar archive
tar -czf - ./foldertotar | (pv -p --timer --rate --bytes > backup.tgz)
Problem
Sounds cool, but pv isn’t available by default.
Solution
Luckily, there is an easy solution.
Simply add the pv package in your .platform.app.yaml file. This will automatically install pv. So you can use it.
dependencies:
nodejs: # Specify one NPM package per line.
pv: '~1.0.1'
Note: you can do this in any container type. PHP, nodejs, golang, …
This works because there is a nodejs package that does the heavy lifting for us.
For more information on dependencies, check our documentation