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document environment variable for starship prompt (#4691)

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It would appear that starship needs an environment variable set to output the prompt correctly on a per shell basis.
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Michael Rutter 2022-03-01 23:38:35 +00:00 committed by GitHub
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docs/3rd_Party_Prompts.md
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@ -32,10 +32,11 @@ let-env PROMPT_COMMAND = { oh-my-posh --config ~/.poshthemes/M365Princess.omp.js
1. Follow the links above and install starship.
2. Install nerdfonts depending on your preferences.
3. If you want the default ticking clock with date & time on the right prompt execut this command `hide PROMPT_COMMAND_RIGHT`
4. If you don't want the default indicator, you can run this command `let-env PROMPT_INDICATOR = " "`
5. Set starship as your left prompt with this command `let-env PROMPT_COMMAND = { starship prompt --cmd-duration $env.CMD_DURATION_MS --status $env.LAST_EXIT_CODE | str trim }`. Note that you may not have to use `str trim` in the nushell prompt if you disable starship's default newline setting with this entry in the starship.toml file `add_newline = false`. There have been reports that this might not play nice with nushell prompts. We're still testing.
6. Since nushell supports a right prompt you can also play around with starship's ability to set a right prompt. Setting the right prompt in nushell is identical to setting the left prompt however you use `PROMPT_COMMAND_RIGHT`.
3. Set the starship shell environment variable to `nu` by running this commend `let-env STARSHIP_SHELL = "nu"`
4. If you want the default ticking clock with date & time on the right prompt execut this command `hide PROMPT_COMMAND_RIGHT`
5. If you don't want the default indicator, you can run this command `let-env PROMPT_INDICATOR = " "`
6. Set starship as your left prompt with this command `let-env PROMPT_COMMAND = { starship prompt --cmd-duration $env.CMD_DURATION_MS --status $env.LAST_EXIT_CODE | str trim }`. Note that you may not have to use `str trim` in the nushell prompt if you disable starship's default newline setting with this entry in the starship.toml file `add_newline = false`. There have been reports that this might not play nice with nushell prompts. We're still testing.
7. Since nushell supports a right prompt you can also play around with starship's ability to set a right prompt. Setting the right prompt in nushell is identical to setting the left prompt however you use `PROMPT_COMMAND_RIGHT`.
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