Icon theme with overrides from config

[ElPapiMango]

• os: debian
• lsd --version: lsd 0.23.1
• echo $TERM: Windows Terminal
• echo $LS_COLORS:

Current behavior

Created icons.yaml in ~/config/lsd folder based on example in documentation. Docs says

"The final set of icons used will be a combination of what is shipped with in lsd with overrides from config applied on top of it".

However this does not work for me. Icons from what is shipped is gone anď only this in icons.yaml is used.

Using icon theme. Config.yaml and icons.yaml has a default icon.

Removing icon theme and now config.yaml and icons.yaml have the icon that is shipped.

[zwpaper]

icon theme is currently on master and not yet released, please try to build master or wait until we release 0.24.0

[ElPapiMango]

Using master though and rebuilt it today and same issue.

[sudame]

I found that if we set extension field in icons.yaml, the default theme for extension is unexpectedly ignored. The same thing happens when we set name field and filetype field.

Speaking on a code basis, I believe the following is the cause of this bug.
https://github.com/Peltoche/lsd/blob/da61909835b281d7f7950ec3f763cd077b5b8f02/src/theme.rs#L78-L86

The return value typed D has Default trait so Serde (Rust's (de)serialize library) will use default field if the field is not set. However in this case a user sets the field so the default field must be ignored.

example

When you set icons.yaml like:

extension:
    rs: 🦀 

lsd constructs IconTheme struct like:

name:
    a.out: \u{f489}
    api: \u{f98c}
    # and the other default values...
extension:
    rs: 🦀
    # ↑ only!
filetype:
    dir: \u{f115}
    file: \u{f016}
    # and the other default entries...

but we want like this:

name:
    a.out: \u{f489}
    api: \u{f98c}
    # and the other default entries...
extension:
    rs: 🦀
    1: \u{f02d}
    2: \u{f02d}
    # and default entries other than those set in the configuration file...
filetype:
    dir: \u{f115}
    file: \u{f016}
    # and the other default values...

Edit

I found that filetype can marge icons.yaml with the default values because IconTheme.filetype is a struct with Default tarit (the others are HashMap<String, String>).

[meain]

@sudame would you like to take a shot at creating a fix for this?

[sudame]

@meain OK, I'll try this.