Add fish support for enter_accept (#1315)

* Add fish support for `enter_accept`

Also fixes shell detection. Who trusted me to write jetlagged code last
night huh?

* Document

atuin-common/src/utils.rs

@@ -115,7 +115,12 @@ pub fn get_current_dir() -> String {
 
 pub fn is_zsh() -> bool {
     // only set on zsh
-    env::var("ZSH_VERSION").is_ok()
+    env::var("ATUIN_SHELL_ZSH").is_ok()
+}
+
+pub fn is_fish() -> bool {
+    // only set on zsh
+    env::var("ATUIN_SHELL_FISH").is_ok()
 }
 
 #[cfg(test)]

atuin/src/command/client/search/interactive.rs

@@ -703,9 +703,10 @@ pub async fn history(
 
     if index < results.len() {
         let mut command = results.swap_remove(index).command;
-        if accept && utils::is_zsh() {
+        if accept && (utils::is_zsh() || utils::is_fish()) {
             command = String::from("__atuin_accept__:") + &command;
         }
+
         // index is in bounds so we return that entry
         Ok(command)
     } else if index == RETURN_ORIGINAL {

atuin/src/shell/atuin.fish

@@ -8,19 +8,26 @@ end
 
 function _atuin_postexec --on-event fish_postexec
     set s $status
+
     if test -n "$ATUIN_HISTORY_ID"
         ATUIN_LOG=error atuin history end --exit $s -- $ATUIN_HISTORY_ID &>/dev/null &
         disown
     end
+
     set --erase ATUIN_HISTORY_ID
 end
 
 function _atuin_search
-    set h (ATUIN_LOG=error atuin search $argv -i -- (commandline -b) 3>&1 1>&2 2>&3)
+    set h (ATUIN_SHELL_FISH=t ATUIN_LOG=error atuin search $argv -i -- (commandline -b) 3>&1 1>&2 2>&3)
     commandline -f repaint
+
     if test -n "$h"
+        if string match -g '__atuin_accept__:*' "$h"
+          eval (string match -r '__atuin_accept__:(.*|\s*)' "$h"  | awk 'NR == 2')
+        else
           commandline -r "$h"
         end
+    end
 end
 
 function _atuin_bind_up
@@ -32,6 +39,7 @@ function _atuin_bind_up
 
     # Only invoke atuin if we're on the top line of the command
     set -l lineno (commandline --line)
+
     switch $lineno
         case 1
             _atuin_search --shell-up-key-binding

atuin/src/shell/atuin.zsh

@@ -10,7 +10,6 @@
 autoload -U add-zsh-hook
 
 export ATUIN_SESSION=$(atuin uuid)
-export ATUIN_HISTORY="atuin history list"
 
 _atuin_preexec() {
     local id
@@ -34,7 +33,7 @@ _atuin_search() {
     # swap stderr and stdout, so that the tui stuff works
     # TODO: not this
     # shellcheck disable=SC2048
-    output=$(ATUIN_LOG=error atuin search $* -i -- $BUFFER 3>&1 1>&2 2>&3)
+    output=$(ATUIN_SHELL_ZSH=t ATUIN_LOG=error atuin search $* -i -- $BUFFER 3>&1 1>&2 2>&3)
 
     zle reset-prompt
 

docs/docs/config/config.md

@@ -309,7 +309,7 @@ remote sync server. Any longer than this and the request will fail.
 ## enter_accept
 Default: false
 
-Only supported on Zsh.
+Only supported on Zsh and Fish.
 
 When set to true, Atuin will default to immediately executing a command rather
 than the user having to press enter twice. Pressing tab will return to the