fix!: remove haskell module (#1418)

Given how slow the Haskell module is (#1240), it is slowing down the entire prompt
from rendering when the module is active. This commit removes the module until we
can find a faster way to retreive the Haskell version.

7 files changed, 0 insertions, 145 deletions

diff --git a/docs/config/README.md b/docs/config/README.md
index 95a89bb3f..01750a601 100644
--- a/docs/config/README.md
+++ b/docs/config/README.md
@@ -112,7 +112,6 @@ prompt_order = [
     "elm",
     "erlang",
     "golang",
-    "haskell",
     "java",
     "julia",
     "nim",
@@ -778,30 +777,6 @@ The module will be shown if any of the following conditions are met:
 [golang]
 symbol = "🏎💨 "
 ```
-## Haskell
-
-The `haskell` module shows the currently installed version of Haskell Stack version.
-The module will be shown if any of the following conditions are met:
-
-- The current directory contains a `stack.yaml` file
-
-### Options
-
-| Variable   | Default      | Description                                               |
-| ---------- | ------------ | --------------------------------------------------------- |
-| `symbol`   | `"λ "`       | The symbol used before displaying the version of Haskell. |
-| `style`    | `"bold red"` | The style for the module.                                 |
-| `disabled` | `false`      | Disables the `haskell` module.                            |
-
-
-### Example
-
-```toml
-# ~/.config/starship.toml
-
-[haskell]
-symbol = " "
-```
 
 ## Hostname
 
diff --git a/src/configs/haskell.rs b/src/configs/haskell.rs
deleted file mode 100644
index b7e29e497..000000000
--- a/src/configs/haskell.rs
+++ /dev/null
@@ -1,23 +0,0 @@
-use crate::config::{ModuleConfig, RootModuleConfig, SegmentConfig};
-
-use ansi_term::{Color, Style};
-use starship_module_config_derive::ModuleConfig;
-
-#[derive(Clone, ModuleConfig)]
-pub struct HaskellConfig<'a> {
-    pub symbol: SegmentConfig<'a>,
-    pub version: SegmentConfig<'a>,
-    pub style: Style,
-    pub disabled: bool,
-}
-
-impl<'a> RootModuleConfig<'a> for HaskellConfig<'a> {
-    fn new() -> Self {
-        HaskellConfig {
-            symbol: SegmentConfig::new("λ "),
-            version: SegmentConfig::default(),
-            style: Color::Red.bold(),
-            disabled: false,
-        }
-    }
-}
diff --git a/src/configs/mod.rs b/src/configs/mod.rs
index 48badefbc..e0a3f470b 100644
--- a/src/configs/mod.rs
+++ b/src/configs/mod.rs
@@ -17,7 +17,6 @@ pub mod git_commit;
 pub mod git_state;
 pub mod git_status;
 pub mod go;
-pub mod haskell;
 pub mod hg_branch;
 pub mod hostname;
 pub mod java;
diff --git a/src/configs/starship_root.rs b/src/configs/starship_root.rs
index f42481257..1fdc61af2 100644
--- a/src/configs/starship_root.rs
+++ b/src/configs/starship_root.rs
@@ -36,7 +36,6 @@ impl<'a> RootModuleConfig<'a> for StarshipRootConfig<'a> {
                 "elm",
                 "erlang",
                 "golang",
-                "haskell",
                 "java",
                 "julia",
                 "nim",
diff --git a/src/module.rs b/src/module.rs
index aa1ad1553..1630591b6 100644
--- a/src/module.rs
+++ b/src/module.rs
@@ -28,7 +28,6 @@ pub const ALL_MODULES: &[&str] = &[
     "git_state",
     "git_status",
     "golang",
-    "haskell",
     "hg_branch",
     "hostname",
     "java",
diff --git a/src/modules/haskell.rs b/src/modules/haskell.rs
deleted file mode 100644
index 9977809ce..000000000
--- a/src/modules/haskell.rs
+++ /dev/null
@@ -1,91 +0,0 @@
-use super::{Context, Module, RootModuleConfig, SegmentConfig};
-
-use crate::configs::haskell::HaskellConfig;
-use crate::utils;
-
-/// Creates a module with the current Haskell Stack version
-///
-/// Will display the Haskell version if any of the following criteria are met:
-///     - Current directory contains a `stack.yaml` file
-///     - Current directory contains a `.cabal` file
-///     - Current directory contains a `package.yaml` file
-pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
-    let is_haskell_project = context
-        .try_begin_scan()?
-        .set_files(&["package.yaml", "stack.yaml", "package.yml", "stack.yml"])
-        .set_extensions(&["cabal"])
-        .is_match();
-
-    if !is_haskell_project {
-        return None;
-    }
-
-    let haskell_version = utils::exec_cmd(
-        "stack",
-        &[
-            "--no-install-ghc",
-            "--lock-file",
-            "read-only",
-            "ghc",
-            "--",
-            "--numeric-version",
-        ],
-    )?
-    .stdout;
-    let formatted_version = Some(format!("v{}", haskell_version.trim()))?;
-
-    let mut module = context.new_module("haskell");
-    let config: HaskellConfig = HaskellConfig::try_load(module.config);
-    module.set_style(config.style);
-
-    module.create_segment("symbol", &config.symbol);
-    module.create_segment("version", &SegmentConfig::new(&formatted_version));
-
-    Some(module)
-}
-
-#[cfg(test)]
-mod tests {
-    use crate::modules::utils::test::render_module;
-    use ansi_term::Color;
-    use std::fs::File;
-    use std::io;
-
-    #[test]
-    fn folder_without_stack_yaml() -> io::Result<()> {
-        let dir = tempfile::tempdir()?;
-        let actual = render_module("haskell", dir.path(), None);
-        let expected = None;
-        assert_eq!(expected, actual);
-        dir.close()
-    }
-
-    #[test]
-    fn folder_with_hpack_file() -> io::Result<()> {
-        let dir = tempfile::tempdir()?;
-        File::create(dir.path().join("package.yaml"))?.sync_all()?;
-        let actual = render_module("haskell", dir.path(), None);
-        let expected = Some(format!("via {} ", Color::Red.bold().paint("λ v8.6.5")));
-        assert_eq!(expected, actual);
-        dir.close()
-    }
-    #[test]
-    fn folder_with_cabal_file() -> io::Result<()> {
-        let dir = tempfile::tempdir()?;
-        File::create(dir.path().join("test.cabal"))?.sync_all()?;
-        let actual = render_module("haskell", dir.path(), None);
-        let expected = Some(format!("via {} ", Color::Red.bold().paint("λ v8.6.5")));
-        assert_eq!(expected, actual);
-        dir.close()
-    }
-
-    #[test]
-    fn folder_with_stack_yaml() -> io::Result<()> {
-        let dir = tempfile::tempdir()?;
-        File::create(dir.path().join("stack.yaml"))?.sync_all()?;
-        let actual = render_module("haskell", dir.path(), None);
-        let expected = Some(format!("via {} ", Color::Red.bold().paint("λ v8.6.5")));
-        assert_eq!(expected, actual);
-        dir.close()
-    }
-}
diff --git a/src/modules/mod.rs b/src/modules/mod.rs
index 1a73a1a22..4ab8bf321 100644
--- a/src/modules/mod.rs
+++ b/src/modules/mod.rs
@@ -17,7 +17,6 @@ mod git_commit;
 mod git_state;
 mod git_status;
 mod golang;
-mod haskell;
 mod hg_branch;
 mod hostname;
 mod java;
@@ -72,7 +71,6 @@ pub fn handle<'a>(module: &str, context: &'a Context) -> Option<Module<'a>> {
         "git_state" => git_state::module(context),
         "git_status" => git_status::module(context),
         "golang" => golang::module(context),
-        "haskell" => haskell::module(context),
         "hg_branch" => hg_branch::module(context),
         "hostname" => hostname::module(context),
         "java" => java::module(context),
@@ -124,7 +122,6 @@ pub fn description(module: &str) -> &'static str {
         "git_state" => "The current git operation, and it's progress",
         "git_status" => "Symbol representing the state of the repo",
         "golang" => "The currently installed version of Golang",
-        "haskell" => "The currently used version of Haskell",
         "hg_branch" => "The active branch of the repo in your current directory",
         "hostname" => "The system hostname",
         "java" => "The currently installed version of Java",