Convert panache-git from script to module (#292)

In Nushell 0.68, the `source` command has been deprecated.
Going forward, the way to utilize custom commands is
to put them into a module and import them with `use`.

This means that `panache-git.nu` had to be converted
from a script to a module so that the main prompt command
could be imported by a user's Nushell environment config.

prompt/panache-git.nu

@@ -2,13 +2,13 @@
 # An opinionated Git prompt for Nushell, styled after posh-git
 #
 # Quick Start:
-# - Download this script (panache-git.nu)
+# - Download this file (panache-git.nu)
 # - In your Nushell config:
-#   - Source this script
+#   - Import the panache-git command from the panache-git.nu module file
 #   - Set panache-git as your prompt command
 #   - Disable the separate prompt indicator by setting it to an empty string
-# - For example, with this script in your home directory:
+# - For example, with this file in your home directory:
-#     source ~/panache-git.nu
+#     use ~/panache-git.nu panache-git
 #     let-env PROMPT_COMMAND = { panache-git }
 #     let-env PROMPT_INDICATOR = { "" }
 # - Restart Nushell
@@ -16,11 +16,14 @@
 # For more documentation or to file an issue, see https://github.com/ehdevries/panache-git
 
 
-# Internal commands for building up the panache-git shell prompt
+# An opinionated Git prompt for Nushell, styled after posh-git
-module panache-plumbing {
+export def panache-git [] {
+  let prompt = ($'(current-dir) (repo-styled)' | str trim)
+  $'($prompt)> '
+}
 
-  # Get the current directory with home abbreviated
+# Get the current directory with home abbreviated
-  export def "panache-git dir" [] {
+def current-dir [] {
   let current_dir = ($env.PWD)
 
   let current_dir_relative_to_home = (
@@ -36,10 +39,10 @@ module panache-plumbing {
   })
 
   $'(ansi reset)($current_dir_abbreviated)'
-  }
+}
 
-  # Get repository status as structured data
+# Get repository status as structured data
-  export def "panache-git structured" [] {
+def repo-structured [] {
   let in_git_repo = (do --ignore-errors { git rev-parse --abbrev-ref HEAD } | is-empty | nope)
 
   let status = (if $in_git_repo {
@@ -239,11 +242,11 @@ module panache-plumbing {
     worktree_deleted_count: $worktree_deleted_count,
     merge_conflict_count: $merge_conflict_count
   }
-  }
+}
 
-  # Get repository status as a styled string
+# Get repository status as a styled string
-  export def "panache-git styled" [] {
+def repo-styled [] {
-    let status = (panache-git structured)
+  let status = (repo-structured)
 
   let is_local_only = ($status.tracking_upstream_branch != true)
 
@@ -373,104 +376,96 @@ module panache-plumbing {
   } else {
     ''
   })
-  }
+}
 
-  # Helper commands to encapsulate style and make everything else more readable
+# Helper commands to encapsulate style and make everything else more readable
 
-  def nope [] {
+def nope [] {
   each { |it| $it == false }
-  }
+}
 
-  def bright-cyan [] {
+def bright-cyan [] {
   each { |it| $"(ansi -e '96m')($it)(ansi reset)" }
-  }
+}
 
-  def bright-green [] {
+def bright-green [] {
   each { |it| $"(ansi -e '92m')($it)(ansi reset)" }
-  }
+}
 
-  def bright-red [] {
+def bright-red [] {
   each { |it| $"(ansi -e '91m')($it)(ansi reset)" }
-  }
+}
 
-  def bright-yellow [] {
+def bright-yellow [] {
   each { |it| $"(ansi -e '93m')($it)(ansi reset)" }
-  }
+}
 
-  def green [] {
+def green [] {
   each { |it| $"(ansi green)($it)(ansi reset)" }
-  }
+}
 
-  def red [] {
+def red [] {
   each { |it| $"(ansi red)($it)(ansi reset)" }
-  }
+}
 
-  def branch-local-only [
+def branch-local-only [
   branch: string
-  ] {
+] {
   $branch | bright-cyan
-  }
+}
 
-  def branch-upstream-deleted [
+def branch-upstream-deleted [
   branch: string
-  ] {
+] {
   $'($branch) (char failed)' | bright-cyan
-  }
+}
 
-  def branch-up-to-date [
+def branch-up-to-date [
   branch: string
-  ] {
+] {
   $'($branch) (char identical_to)' | bright-cyan
-  }
+}
 
-  def branch-ahead [
+def branch-ahead [
   branch: string
   ahead: int
-  ] {
+] {
   $'($branch) (char branch_ahead)($ahead)' | bright-green
-  }
+}
 
-  def branch-behind [
+def branch-behind [
   branch: string
   behind: int
-  ] {
+] {
   $'($branch) (char branch_behind)($behind)' | bright-red
-  }
+}
 
-  def branch-ahead-and-behind [
+def branch-ahead-and-behind [
   branch: string
   ahead: int
   behind: int
-  ] {
+] {
   $'($branch) (char branch_behind)($behind) (char branch_ahead)($ahead)' | bright-yellow
-  }
+}
 
-  def staging-changes [
+def staging-changes [
   added: int
   modified: int
   deleted: int
-  ] {
+] {
   $'+($added) ~($modified) -($deleted)' | green
-  }
+}
 
-  def worktree-changes [
+def worktree-changes [
   added: int
   modified: int
   deleted: int
-  ] {
+] {
   $'+($added) ~($modified) -($deleted)' | red
-  }
+}
 
-  def unresolved-conflicts [
+def unresolved-conflicts [
   conflicts: int
-  ] {
+] {
   $'!($conflicts)' | red
-  }
-}
-
-# An opinionated Git prompt for Nushell, styled after posh-git
-def panache-git [] {
-  use panache-plumbing *
-  let prompt = ($'(panache_git dir) (panache-git styled)' | str trim)
-  $'($prompt)> '
 }