Make it possible to disable `Ctrl+T` / `Alt+C` / completions (#3678)

This makes it possible to skip one of the above key bindings or
completions by setting a variable to an empty string. For example,

    FZF_CTRL_T_COMMAND= FZF_ALT_C_COMMAND= \
      eval "$(fzf --zsh)"

Co-authored-by: Junegunn Choi <junegunn.c@gmail.com>

6 files changed, 60 insertions, 23 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f902833e..fc312d79 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,22 @@
 CHANGELOG
 =========
 
+0.48.1
+------
+- CTRL-T and ALT-C bindings can be disabled by setting `FZF_CTRL_T_COMMAND` and `FZF_ALT_C_COMMAND` to empty strings respectively when sourcing the script
+    ```sh
+    # bash
+    FZF_CTRL_T_COMMAND= FZF_ALT_C_COMMAND= eval "$(fzf --bash)"
+
+    # zsh
+    FZF_CTRL_T_COMMAND= FZF_ALT_C_COMMAND= eval "$(fzf --zsh)"
+
+    # fish
+    fzf --fish | FZF_CTRL_T_COMMAND= FZF_ALT_C_COMMAND= source
+    ```
+    - Setting the variables after sourcing the script will have no effect
+- Bug fixes
+
 0.48.0
 ------
 - Shell integration scripts are now embedded in the fzf binary. This simplifies the distribution, and the users are less likely to have problems caused by using incompatible scripts and binaries.
diff --git a/README.md b/README.md
index 4b8867a0..909b5276 100644
--- a/README.md
+++ b/README.md
@@ -437,6 +437,8 @@ fish.
         --preview 'bat -n --color=always {}'
         --bind 'ctrl-/:change-preview-window(down|hidden|)'"
       ```
+    - Can be disabled by setting `FZF_CTRL_T_COMMAND` to an empty string when
+      sourcing the script
 - `CTRL-R` - Paste the selected command from history onto the command-line
     - If you want to see the commands in chronological order, press `CTRL-R`
       again which toggles sorting by relevance
@@ -462,6 +464,8 @@ fish.
         --walker-skip .git,node_modules,target
         --preview 'tree -C {}'"
       ```
+    - Can be disabled by setting `FZF_ALT_C_COMMAND` to an empty string when
+      sourcing the script
 
 If you're on a tmux session, you can start fzf in a tmux split-pane or in
 a tmux popup window by setting `FZF_TMUX_OPTS` (e.g. `export FZF_TMUX_OPTS='-p80%,60%'`).
diff --git a/shell/key-bindings.bash b/shell/key-bindings.bash
index f6cd48f1..a290e4ca 100644
--- a/shell/key-bindings.bash
+++ b/shell/key-bindings.bash
@@ -102,9 +102,11 @@ bind -m emacs-standard '"\C-z": vi-editing-mode'
 
 if (( BASH_VERSINFO[0] < 4 )); then
   # CTRL-T - Paste the selected file path into the command line
-  bind -m emacs-standard '"\C-t": " \C-b\C-k \C-u`__fzf_select__`\e\C-e\er\C-a\C-y\C-h\C-e\e \C-y\ey\C-x\C-x\C-f"'
-  bind -m vi-command '"\C-t": "\C-z\C-t\C-z"'
-  bind -m vi-insert '"\C-t": "\C-z\C-t\C-z"'
+  if [[ "${FZF_CTRL_T_COMMAND-x}" != "" ]]; then
+    bind -m emacs-standard '"\C-t": " \C-b\C-k \C-u`__fzf_select__`\e\C-e\er\C-a\C-y\C-h\C-e\e \C-y\ey\C-x\C-x\C-f"'
+    bind -m vi-command '"\C-t": "\C-z\C-t\C-z"'
+    bind -m vi-insert '"\C-t": "\C-z\C-t\C-z"'
+  fi
 
   # CTRL-R - Paste the selected command from history into the command line
   bind -m emacs-standard '"\C-r": "\C-e \C-u\C-y\ey\C-u`__fzf_history__`\e\C-e\er"'
@@ -112,9 +114,11 @@ if (( BASH_VERSINFO[0] < 4 )); then
   bind -m vi-insert '"\C-r": "\C-z\C-r\C-z"'
 else
   # CTRL-T - Paste the selected file path into the command line
-  bind -m emacs-standard -x '"\C-t": fzf-file-widget'
-  bind -m vi-command -x '"\C-t": fzf-file-widget'
-  bind -m vi-insert -x '"\C-t": fzf-file-widget'
+  if [[ "${FZF_CTRL_T_COMMAND-x}" != "" ]]; then
+    bind -m emacs-standard -x '"\C-t": fzf-file-widget'
+    bind -m vi-command -x '"\C-t": fzf-file-widget'
+    bind -m vi-insert -x '"\C-t": fzf-file-widget'
+  fi
 
   # CTRL-R - Paste the selected command from history into the command line
   bind -m emacs-standard -x '"\C-r": __fzf_history__'
@@ -123,6 +127,8 @@ else
 fi
 
 # ALT-C - cd into the selected directory
-bind -m emacs-standard '"\ec": " \C-b\C-k \C-u`__fzf_cd__`\e\C-e\er\C-m\C-y\C-h\e \C-y\ey\C-x\C-x\C-d"'
-bind -m vi-command '"\ec": "\C-z\ec\C-z"'
-bind -m vi-insert '"\ec": "\C-z\ec\C-z"'
+if [[ "${FZF_ALT_C_COMMAND-x}" != "" ]]; then
+  bind -m emacs-standard '"\ec": " \C-b\C-k \C-u`__fzf_cd__`\e\C-e\er\C-m\C-y\C-h\e \C-y\ey\C-x\C-x\C-d"'
+  bind -m vi-command '"\ec": "\C-z\ec\C-z"'
+  bind -m vi-insert '"\ec": "\C-z\ec\C-z"'
+fi
diff --git a/shell/key-bindings.fish b/shell/key-bindings.fish
index 51ddcc0d..6e62c59c 100644
--- a/shell/key-bindings.fish
+++ b/shell/key-bindings.fish
@@ -104,14 +104,22 @@ function fzf_key_bindings
     end
   end
 
-  bind \ct fzf-file-widget
   bind \cr fzf-history-widget
-  bind \ec fzf-cd-widget
+  if not set -q FZF_CTRL_T_COMMAND; or test -n "$FZF_CTRL_T_COMMAND"
+    bind \ct fzf-file-widget
+  end
+  if not set -q FZF_ALT_C_COMMAND; or test -n "$FZF_ALT_C_COMMAND"
+    bind \ec fzf-cd-widget
+  end
 
   if bind -M insert > /dev/null 2>&1
-    bind -M insert \ct fzf-file-widget
     bind -M insert \cr fzf-history-widget
-    bind -M insert \ec fzf-cd-widget
+    if not set -q FZF_CTRL_T_COMMAND; or test -n "$FZF_CTRL_T_COMMAND"
+      bind -M insert \ct fzf-file-widget
+    end
+    if not set -q FZF_ALT_C_COMMAND; or test -n "$FZF_ALT_C_COMMAND"
+      bind -M insert \ec fzf-cd-widget
+    end
   end
 
   function __fzf_parse_commandline -d 'Parse the current command line token and return split of existing filepath, fzf query, and optional -option= prefix'
diff --git a/shell/key-bindings.zsh b/shell/key-bindings.zsh
index a3699add..51aa6ea0 100644
--- a/shell/key-bindings.zsh
+++ b/shell/key-bindings.zsh
@@ -62,10 +62,12 @@ fzf-file-widget() {
   zle reset-prompt
   return $ret
 }
-zle     -N            fzf-file-widget
-bindkey -M emacs '^T' fzf-file-widget
-bindkey -M vicmd '^T' fzf-file-widget
-bindkey -M viins '^T' fzf-file-widget
+if [[ "${FZF_CTRL_T_COMMAND-x}" != "" ]]; then
+  zle     -N            fzf-file-widget
+  bindkey -M emacs '^T' fzf-file-widget
+  bindkey -M vicmd '^T' fzf-file-widget
+  bindkey -M viins '^T' fzf-file-widget
+fi
 
 # ALT-C - cd into the selected directory
 fzf-cd-widget() {
@@ -83,10 +85,12 @@ fzf-cd-widget() {
   zle reset-prompt
   return $ret
 }
-zle     -N             fzf-cd-widget
-bindkey -M emacs '\ec' fzf-cd-widget
-bindkey -M vicmd '\ec' fzf-cd-widget
-bindkey -M viins '\ec' fzf-cd-widget
+if [[ "${FZF_ALT_C_COMMAND-x}" != "" ]]; then
+  zle     -N             fzf-cd-widget
+  bindkey -M emacs '\ec' fzf-cd-widget
+  bindkey -M vicmd '\ec' fzf-cd-widget
+  bindkey -M viins '\ec' fzf-cd-widget
+fi
 
 # CTRL-R - Paste the selected command from history into the command line
 fzf-history-widget() {
diff --git a/test/test_go.rb b/test/test_go.rb
index 599d5442..97061de0 100755
--- a/test/test_go.rb
+++ b/test/test_go.rb
@@ -18,7 +18,6 @@ UNSETS = %w[
   FZF_ALT_C_COMMAND
   FZF_ALT_C_OPTS FZF_CTRL_R_OPTS
   FZF_API_KEY
-  fish_history
 ].freeze
 DEFAULT_TIMEOUT = 10
 
@@ -67,7 +66,7 @@ class Shell
     end
 
     def fish
-      UNSETS.map { |v| v + '= ' }.join + ' FZF_DEFAULT_OPTS=--no-scrollbar fish'
+      "unset #{UNSETS.join(' ')}; FZF_DEFAULT_OPTS=--no-scrollbar fish_history= fish"
     end
   end
 end