support reading scoop home from the config file

[v1nh1shungry]

The recent version doesn't require defining SCOOP to specify the custom install directory. Instead, it's now recommended to use .\install.ps1 -ScoopDir 'D:\Applications\Scoop' according to https://github.com/ScoopInstaller/Install#advanced-installation. In this way, scoop stores the root path in the config file which is typically 'C:\Users\foobar.config\scoop\config.json`.

This patch adds support for reading scoop's config file to get the scoop's root path so users like me don't have to define SCOOP to have scoop-search works.

[shilangyu]

For my reference:

• scoop installer decides about the root path using the param value but fallbacking to $env:SCOOP (https://github.com/ScoopInstaller/Install/blob/f1cf244456a4201a4ee3d1ad8cea2ac96e301198/install.ps1#L559)
• the config path is determined based off the XDG directory or just ~/.config (https://github.com/ScoopInstaller/Install/blob/f1cf244456a4201a4ee3d1ad8cea2ac96e301198/install.ps1#L571)
• BUT once scoop is installed it gives higher priority to the $env:SCOOP variable over the config variable (https://github.com/ScoopInstaller/Scoop/blob/f93028001fbe5c78cc41f59e3814d2ac8e595724/lib/core.ps1#L1259)

So this PR LGTM. Except, if you could, please also read the XDG variable before reading the home directory, so that the behavior is the same as scoop's.

[shilangyu]

I think this also closes #28

[v1nh1shungry]

Thanks for the review!

Except, if you could, please also read the XDG variable before reading the home directory, so that the behavior is the same as scoop's.

I've considered it before. AFAIK the XDG variable is usually available in X, I thought scoop is mostly used in Windows. But you're right, let's keep the behavior the same as scoop's.

[shilangyu]

Thanks for the contribution!

[shilangyu]

Released as https://github.com/shilangyu/scoop-search/releases/tag/v1.3.0

[eidswe]

@v1nh1shungry @shilangyu
Unable to use scoop-search after update, encountered the same problem as #31

[v1nh1shungry]

Thanks for the report, @eidswe!

My guess is you have a config file which may be kind of C:\Users\eidswe\.config\scoop\config.json, but it doesn't have a field named root_path. Could you please check this? Thanks!

FYI, I check again the install script, and I find that when installed with SCOOP specified or the install directory is the default value, the installation won't write the root path.

[eidswe]

Yes, config.json doesn't have a field named root_path, the issue has been fixed.Thank you