fix(nushell): append to existing nu keybindings instead of replacing them (#635)

## 📺 PR Description

Fixes #628

## Checklist

<!-- a quick pass through the following items to make sure you haven't
forgotten anything -->

- [ ] my commits **and PR title** follow the [conventional
commits](https://www.conventionalcommits.org/en/v1.0.0/#summary) format
- [ ] if this is a new feature, I have added tests to consolidate the
feature and prevent regressions
- [ ] if this is a bug fix, I have added a test that reproduces the bug
(if applicable)
- [ ] I have added a reasonable amount of documentation to the code
where appropriate

justfile

@@ -75,21 +75,10 @@ alias b := build
 # Build the project in release mode
 br: (build 'release')
 
-
-# test the zsh shell completion script in debug mode
-# Run: `source <(just generate-zsh-completion)` directly in zsh
-@generate-zsh-completion:
-	cargo run -- init zsh | sed 's/tv /.\/target\/debug\/tv /'
-
-# test the fish shell completion script in debug mode
-# Run: `source <(just generate-fish-completion)` directly in fish
-@generate-fish-completion:
-	cargo run -- init fish | sed '2,$ s/tv /.\/target\/debug\/tv /'
-
-# test the bash shell completion script in debug mode
-# Run: `source <(just generate-bash-completion)` directly in bash
-@generate-bash-completion:
-	cargo run -- init bash | sed 's/tv /.\/target\/debug\/tv /'
+# Generate a dev shell integration script for local development
+@generate-dev-shell-integration shell='zsh':
+	cargo run -- init {{ shell }} | sed 's/tv /.\/target\/debug\/tv /' > dev_shell_integration.{{ shell }}
+	echo 'To activate {{ shell }} dev integration, run:  `source dev_shell_integration.{{ shell }}`'
 
 # Update the project's changelog
 @update-changelog:

television/utils/shell/README.md

@@ -0,0 +1,16 @@
+# Developing locally
+
+In order to develop locally on the shell integration scripts, here are a couple of steps to follow:
+
+0. Clone the repo, make sure you're up to date and have the [just](https://github.com/casey/just) command runner installed.
+1. Make your changes to any one of the shell scripts (`television/utils/shell/`)
+2. Generate a dev version of the script by running:
+   ```sh
+   just generate-dev-shell-integration zsh
+   ```
+   (or `fish`, `bash`, etc. depending on the shell you are using)
+3. Source the generated script in your shell:
+   ```sh
+   source dev_shell_integration.zsh
+   ```
+4. Test the changes by using the shell integration keybindings or commands in your terminal.

television/utils/shell/completion.fish

@@ -1,4 +1,4 @@
-function __tv_parse_commandline --description 'Parse the current command line token and return split of existing filepath, and tv query'
+function __tv_parse_commandline --description 'Parse the current command line token and return split of existing filepath, and query'
     # credits to the junegunn/fzf project
     # https://github.com/junegunn/fzf/blob/9c1a47acf7453f9dad5905b7f23ad06e5195d51f/shell/key-bindings.fish#L53-L131
 

television/utils/shell/completion.nu

@@ -29,29 +29,31 @@ def tv_shell_history [] {
 }
 
 # Bind custom keybindings
-
 $env.config = (
   $env.config
-  | upsert keybindings [
-        {
-            name: tv_completion,
-            modifier: Control,
-            keycode: char_t,
-            mode: [vi_normal, vi_insert, emacs],
-            event: {
-                send: executehostcommand,
-                cmd: "tv_smart_autocomplete"
-            }
-        }
-        {
-            name: tv_history,
-            modifier: Control,
-            keycode: char_r,
-            mode: [vi_normal, vi_insert, emacs],
-            event: {
-                send: executehostcommand,
-                cmd: "tv_shell_history"
-            }
-        }
-    ]
+  | upsert keybindings (
+      $env.config.keybindings
+      | append [
+          {
+              name: tv_completion,
+              modifier: Control,
+              keycode: char_t,
+              mode: [vi_normal, vi_insert, emacs],
+              event: {
+                  send: executehostcommand,
+                  cmd: "tv_smart_autocomplete"
+              }
+          }
+          {
+              name: tv_history,
+              modifier: Control,
+              keycode: char_r,
+              mode: [vi_normal, vi_insert, emacs],
+              event: {
+                  send: executehostcommand,
+                  cmd: "tv_shell_history"
+              }
+          }
+      ]
+  )
 )