feat(scoop-info): Show app installed/download size

[tech189]

Description

• Adds two new pieces of information to the scoop info command when using the -v verbose switch
• If the app is installed, it will get the list of files inside the app's installation folder, its persist folder and any cached downloads.
• Then it will add these up and display them one by one with a total underneath.
• If the app isn't installed, then it will try to get the URL from the manifest for the current architecture and get the Content-Length header from the download server. It will add up the total for each file given in the manifest.
• Then it will display the total download size or 'Unknown' if the server doesn't provide the info (e.g. sourceforge).
• If the app is cached but not installed, it will let the user know if the latest version is in the cache.

For example, for installed apps:

Name           : sharex
Description    : Screen capture, file sharing and productivity tool.
<other properties...>
Installed size : App: 16.1 MB
                 Persist: 768.3 KB
                 Cache: 7.2 MB
                 Total: 24.1 MB
Binaries       : ShareX.exe
Shortcuts      : ShareX

Another example with a not yet installed app:

Name          : vlc
Description   : A free and open source cross-platform multimedia player and framework that plays most multimedia files
                as well as DVDs, Audio CDs, VCDs, and various streaming protocols.
<other properties...>
Download size : 35.2 MB
Binaries      : vlc.exe
Shortcuts     : VLC media player

An example with an app that is uninstalled but the latest version can be installed using cache:

Name          : chef-workstation
Description   : Chef Workstation is Chef's modern developer tool kit that includes Chef Infra, InSpec and Habitat plus
                a host of resources, helpers and testing tools that make automating infrastructure, application and
                security testing easier than ever. Chef Workstation supercedes ChefDK.
<other properties...>
Download size : 620.7 MB (latest version is cached)
Shortcuts     : Chef Workstation
Path Added    : C:\Users\me\scoop\apps\chef-workstation\current\bin

Motivation and Context

• Closes [Feature] Display app's installation size in scoop info #4840
• Closes Feature request - Show possible download size in status command #2381
• Allows users to quickly determine the total size of an app without leaving their terminal session
• Allows users to determine the data usage of downloading an app before installing

How Has This Been Tested?

• Tested with many apps: those with and without persisted data or cached data, with those that are uninstalled and not.
• Tested to see if it double counts persisted data when evaluating app size - it doesn't.
• Tested the download size with manifests with architecture blocks and those without.
• Tested download size with manifests with multiple urls and those with just one.

Checklist:

• I have read the Contributing Guide.
• I have updated the documentation accordingly.
  • added to changelog
• I have updated the tests accordingly.
  • not sure which tests should be run

[rashil2000]

Hey, this looks great, but I think you forgot to use the $verbose switch 😅

[tech189]

Oops, yeah I totally forgot! I added the check now :)

[rashil2000]

There's a catch here. When showing installed size, the code shows the sizes for previous app versions too. This is a bit wrong IMO, since the 'App size' will be double or triple (if there are 2/3 older versions kept) the actual size. One solution is to show another category 'Previous versions' and show their sizes separately from the 'current' version size.

[tech189]

Now it looks like this:

Installed size : Current version: 70.8 MB
                 Old versions: 139.5 MB
                 Persisted data: 8.1 MB
                 Cached downloads: 50.7 MB
                 Total: 269.1 MB

I had to make the category names a bit longer to make them line up roughly. Would it be a good idea to add further spaces so that they line up perfectly like so:

Installed size : Current version:  70.8 MB
                 Old versions:     139.5 MB
                 Persisted data:   8.1 MB
                 Cached downloads: 50.7 MB
                 Total:            269.1 MB

Or maybe a '-----' divider before the total? Or keep it as it is?

[rashil2000]

Would it be a good idea to add further spaces so that they line up perfectly

Yes!

[tech189]

Okay, sorted. Now each total lines up in a column :)

[rashil2000]

Idea: Should we omit a particular size field if its value is 0 B?

[tech189]

Output is now as short as possible 🚀

For app with files in each category:

Installed size : Current version:  41.2 MB
                 Old versions:     35.4 MB
                 Persisted data:   882 B
                 Cached downloads: 20.1 MB
                 Total:            96.6 MB

App with no old versions:

Installed size : Current version:  311.4 MB
                 Persisted data:   21.1 MB
                 Cached downloads: 361.5 MB
                 Total:            693.9 MB

App with no persisted data:

Installed size : Current version:  13.9 MB
                 Cached downloads: 17.3 MB
                 Total:            31.2 MB

App with no cache either:

Installed size : 276.6 MB

[rashil2000]

@niheaven can this feature be released in 0.2.2? It's been sitting for a while.

[niheaven]

Will review tomorrow and find something to tweak at a glance.

v0.2.2 fixes Get-Manifest()'s bugs and should be released ASAP.

[niheaven]

Some tweak, and been tested

[tech189]

Thanks for the review and tweaks! I think it's ready now, I've tested it all too.

I only found one issue but I think it's not related to my changes - I'll open up an issue after this is merged into develop. (if you install an app with app-name@x.x.x syntax, it does not show up in scoop-info as 'installed' - and so instead of showing app size, it will show the download size even though it is already installed)