feat(shell): shell integration support for fish (#186)

cable/unix-channels.toml

@@ -40,3 +40,8 @@ source_command = "tail -r $HOME/.zsh_history | cut -d\";\" -f 2-"
 [[cable_channel]]
 name = "bash-history"
 source_command = "tail -r $HOME/.bash_history"
+
+[[cable_channel]]
+name = "fish-history"
+source_command = "fish -c 'history'"
+

crates/television-utils/shell/completion.fish

@@ -0,0 +1,22 @@
+function tv_smart_autocomplete
+    set -l current_prompt (commandline -cp)
+
+    set -l output (tv --autocomplete-prompt "$current_prompt")
+
+    if test -n "$output"
+        commandline -r "$current_prompt$output"
+    end
+end
+
+function tv_shell_history
+    set -l current_prompt (commandline -cp)
+
+    set -l output (tv fish-history --input "$current_prompt")
+
+    if test -n "$output"
+        commandline -r "$output"
+    end
+end
+
+bind \ct tv_smart_autocomplete
+bind \cr tv_shell_history

crates/television-utils/src/shell.rs

@@ -11,11 +11,13 @@ pub enum Shell {
 
 const COMPLETION_ZSH: &str = include_str!("../shell/completion.zsh");
 const COMPLETION_BASH: &str = include_str!("../shell/completion.bash");
+const COMPLETION_FISH: &str = include_str!("../shell/completion.fish");
 
 pub fn completion_script(shell: Shell) -> Result<&'static str> {
     match shell {
         Shell::Bash => Ok(COMPLETION_BASH),
         Shell::Zsh => Ok(COMPLETION_ZSH),
+        Shell::Fish => Ok(COMPLETION_FISH),
         _ => color_eyre::eyre::bail!(
             "This shell is not yet supported: {:?}",
             shell