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63 lines
1.9 KiB
Plaintext
63 lines
1.9 KiB
Plaintext
---
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id: haskell
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title: Haskell
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sidebar_label: Haskell
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---
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## What
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Display the currently active Glasgow Haskell Compiler (GHC) version.
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## Sample Configuration
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```json
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{
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"type": "haskell",
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"style": "powerline",
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"powerline_symbol": "\uE0B0",
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"foreground": "#906cff",
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"background": "#100e23",
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"template": " \ue61f {{ .Full }}"
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}
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```
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## Properties
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- home_enabled: `boolean` - display the segment in the HOME folder or not - defaults to `false`
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- fetch_version: `boolean` - display the GHC version - defaults to `true`
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- missing_command_text: `string` - text to display when the command is missing - defaults to empty
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- display_mode: `string` - determines when the segment is displayed
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- `always`: the segment is always displayed
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- `files`: the segment is only displayed when `*.hs`, `*.lhs`, `stack.yaml`, `package.yaml`, `*.cabal`,
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or `cabal.project` files are present (default)
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- version_url_template: `string` - a go [text/template][go-text-template] [template][templates] that creates
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the URL of the version info / release notes
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- stack_ghc_mode: `string` - determines when to use stack ghc to retrieve the version information.
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Using stack ghc will decrease performance.
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- `never`: never use stack ghc (default)
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- `package`: only use stack ghc when `stack.yaml` is in the root of the package
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- `always`: always use stack ghc
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## Template ([info][templates])
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:::note default template
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```template
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{{ if .Error }}{{ .Error }}{{ else }}{{ .Full }}{{ end }}
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```
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:::
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### Properties
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- `.Full`: `string` - the full version
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- `.Major`: `string` - major number
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- `.Minor`: `string` - minor number
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- `.Patch`: `string` - patch number
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- `.URL`: `string` - URL of the version info / release notes
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- `.Error`: `string` - error encountered when fetching the version string
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- `.StackGhc`: `boolean` - `true` if stack ghc was used, otherwise `false`
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[go-text-template]: https://golang.org/pkg/text/template/
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[templates]: /docs/configuration/templates
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