Leverage existing bash completion

This is a PoC implementation for leveraging existing bash completion

git **<tab>
kubectl **<tab>

README.md

@@ -28,14 +28,13 @@ history, processes, hostnames, bookmarks, git commits, etc. It implements
 a "fuzzy" matching algorithm, so you can quickly type in patterns with omitted
 characters and still get the results you want.
 
-Pros
+Highlights
-----
+----------
 
-- Portable, no dependencies
+- 📦 **Portable** — Distributed as a single binary for easy installation
-- Blazingly fast
+- ⚡ **Blazingly fast** — Highly optimized code instantly processes millions of items
-- Extremely versatile
+- 🛠️ **Extremely versatile** — Fully customizable via an event-action binding mechanism
-- Batteries included
+- 🔋 **Batteries included** — Includes integration with bash, zsh, fish, Vim, and Neovim
-    - bash/zsh/fish integration, tmux integration, Vim/Neovim plugin
 
 Sponsors ❤️
 -----------
@@ -44,7 +43,7 @@ I would like to thank all the sponsors of this project who make it possible for
 
 If you'd like to sponsor this project, please visit https://github.com/sponsors/junegunn.
 
-<!-- sponsors --><a href="https://github.com/miyanokomiya"><img src="https://github.com/miyanokomiya.png" width="60px" alt="miyanokomiya" /></a><a href="https://github.com/jonhoo"><img src="https://github.com/jonhoo.png" width="60px" alt="Jon Gjengset" /></a><a href="https://github.com/AceofSpades5757"><img src="https://github.com/AceofSpades5757.png" width="60px" alt="Kyle L. Davis" /></a><a href="https://github.com/Frederick888"><img src="https://github.com/Frederick888.png" width="60px" alt="Frederick Zhang" /></a><a href="https://github.com/moritzdietz"><img src="https://github.com/moritzdietz.png" width="60px" alt="Moritz Dietz" /></a><a href="https://github.com/mikker"><img src="https://github.com/mikker.png" width="60px" alt="Mikkel Malmberg" /></a><a href="https://github.com/pldubouilh"><img src="https://github.com/pldubouilh.png" width="60px" alt="Pierre Dubouilh" /></a><a href="https://github.com/trantor"><img src="https://github.com/trantor.png" width="60px" alt="Fulvio Scapin" /></a><a href="https://github.com/rcorre"><img src="https://github.com/rcorre.png" width="60px" alt="Ryan Roden-Corrent" /></a><a href="https://github.com/blissdev"><img src="https://github.com/blissdev.png" width="60px" alt="Jordan Arentsen" /></a><a href="https://github.com/mislav"><img src="https://github.com/mislav.png" width="60px" alt="Mislav Marohnić" /></a><a href="https://github.com/aexvir"><img src="https://github.com/aexvir.png" width="60px" alt="Alex Viscreanu" /></a><a href="https://github.com/dbalatero"><img src="https://github.com/dbalatero.png" width="60px" alt="David Balatero" /></a><a href="https://github.com/moobar"><img src="https://github.com/moobar.png" width="60px" alt="" /></a><a href="https://github.com/majjoha"><img src="https://github.com/majjoha.png" width="60px" alt="Mathias Jean Johansen" /></a><a href="https://github.com/benelan"><img src="https://github.com/benelan.png" width="60px" alt="Ben Elan" /></a><a href="https://github.com/pawelduda"><img src="https://github.com/pawelduda.png" width="60px" alt="Paweł Duda" /></a><a href="https://github.com/slezica"><img src="https://github.com/slezica.png" width="60px" alt="Santiago Lezica" /></a><a href="https://github.com/pbwn"><img src="https://github.com/pbwn.png" width="60px" alt="" /></a><a href="https://github.com/timgluz"><img src="https://github.com/timgluz.png" width="60px" alt="Timo Sulg" /></a><a href="https://github.com/pyrho"><img src="https://github.com/pyrho.png" width="60px" alt="Damien Rajon" /></a><a href="https://github.com/ArtBIT"><img src="https://github.com/ArtBIT.png" width="60px" alt="ArtBIT" /></a><a href="https://github.com/da-moon"><img src="https://github.com/da-moon.png" width="60px" alt="" /></a><a href="https://github.com/jiangyinzuo"><img src="https://github.com/jiangyinzuo.png" width="60px" alt="Yinzuo Jiang" /></a><a href="https://github.com/hovissimo"><img src="https://github.com/hovissimo.png" width="60px" alt="Hovis" /></a><a href="https://github.com/dariusjonda"><img src="https://github.com/dariusjonda.png" width="60px" alt="Darius Jonda" /></a><a href="https://github.com/cristiand391"><img src="https://github.com/cristiand391.png" width="60px" alt="Cristian Dominguez" /></a><a href="https://github.com/eliangcs"><img src="https://github.com/eliangcs.png" width="60px" alt="Chang-Hung Liang" /></a><a href="https://github.com/asphaltbuffet"><img src="https://github.com/asphaltbuffet.png" width="60px" alt="Ben Lechlitner" /></a><a href="https://github.com/yash1th"><img src="https://github.com/yash1th.png" width="60px" alt="yash" /></a><a href="https://github.com/looshch"><img src="https://github.com/looshch.png" width="60px" alt="george looshch" /></a><a href="https://github.com/kg8m"><img src="https://github.com/kg8m.png" width="60px" alt="Takumi KAGIYAMA" /></a><a href="https://github.com/polm"><img src="https://github.com/polm.png" width="60px" alt="Paul OLeary McCann" /></a><a href="https://github.com/rbeeger"><img src="https://github.com/rbeeger.png" width="60px" alt="Robert Beeger" /></a><a href="https://github.com/veebch"><img src="https://github.com/veebch.png" width="60px" alt="VEEB Projects" /></a><a href="https://github.com/yowayb"><img src="https://github.com/yowayb.png" width="60px" alt="Yoway Buorn" /></a><a href="https://github.com/scalisi"><img src="https://github.com/scalisi.png" width="60px" alt="Josh Scalisi" /></a><a href="https://github.com/alecbcs"><img src="https://github.com/alecbcs.png" width="60px" alt="Alec Scott" /></a><a href="https://github.com/thnxdev"><img src="https://github.com/thnxdev.png" width="60px" alt="thanks.dev" /></a><a href="https://github.com/artursapek"><img src="https://github.com/artursapek.png" width="60px" alt="Artur Sapek" /></a><a href="https://github.com/ramnes"><img src="https://github.com/ramnes.png" width="60px" alt="Guillaume Gelin" /></a><a href="https://github.com/jyc"><img src="https://github.com/jyc.png" width="60px" alt="" /></a><a href="https://githubLine truncated
+<!-- sponsors --><a href="https://github.com/miyanokomiya"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;20733354?u&#x3D;363dbf6d7becb19a848535228189abc7b263697c&amp;v&#x3D;4" width="60px" alt="miyanokomiya" /></a><a href="https://github.com/jonhoo"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;176295?u&#x3D;264ece14e9ef7ce507becbaecc6b4ac4271d4e4f&amp;v&#x3D;4" width="60px" alt="Jon Gjengset" /></a><a href="https://github.com/AceofSpades5757"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;10341888?u&#x3D;996946cf9555e309a6a1fd03d2c72080217b4999&amp;v&#x3D;4" width="60px" alt="Kyle L. Davis" /></a><a href="https://github.com/Frederick888"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;4507647?u&#x3D;8feed5449181b62831b6f4f526cf2c075d7833b2&amp;v&#x3D;4" width="60px" alt="Frederick Zhang" /></a><a href="https://github.com/moritzdietz"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;7935536?u&#x3D;79a728c053f252e08eb2b3d1030569058c8f6c63&amp;v&#x3D;4" width="60px" alt="Moritz Dietz" /></a><a href="https://github.com/mikker"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;2819?u&#x3D;6a2ada89a4baf89ee431d6940ed674cb46eceb88&amp;v&#x3D;4" width="60px" alt="Mikkel Malmberg" /></a><a href="https://github.com/pldubouilh"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;760637?u&#x3D;476f763b74ce175e0c6d74789b304ad94ecddd4b&amp;v&#x3D;4" width="60px" alt="Pierre Dubouilh" /></a><a href="https://github.com/trantor"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;69568?v&#x3D;4" width="60px" alt="Fulvio Scapin" /></a><a href="https://github.com/rcorre"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;2496231?u&#x3D;2a46dcfdbcdc02f29ac395d8de5efd222fa174bc&amp;v&#x3D;4" width="60px" alt="Ryan Roden-Corrent" /></a><a href="https://github.com/blissdev"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;3456?v&#x3D;4" width="60px" alt="Jordan Arentsen" /></a><a href="https://github.com/mislav"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;887?u&#x3D;5ce21332bfb47e39de1fddeb28b4192d1f8d543a&amp;v&#x3D;4" width="60px" alt="Mislav Marohnić" /></a><a href="https://github.com/aexvir"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;8055505?u&#x3D;3cc5cc4daba1b0eb027c6b20b29720831832025d&amp;v&#x3D;4" width="60px" alt="Alex Viscreanu" /></a><a href="https://github.com/dbalatero"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;59429?u&#x3D;67d5158d381fa28b0ce849b3976dc7c8ac1faa54&amp;v&#x3D;4" width="60px" alt="David Balatero" /></a><a href="https://github.com/moobar"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;4176540?v&#x3D;4" width="60px" alt="" /></a><a href="https://github.com/majjoha"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;233988?v&#x3D;4" width="60px" alt="Mathias Jean Johansen" /></a><a href="https://github.com/benelan"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;10986395?u&#x3D;44009e8406b0a1f2487a2710e0763b345590fa7c&amp;v&#x3D;4" width="60px" alt="Ben Elan" /></a><a href="https://github.com/pawelduda"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;3728827?u&#x3D;18306be396fdb2560e04ff5db57d9024c40ec561&amp;v&#x3D;4" width="60px" alt="Paweł Duda" /></a><a href="https://github.com/slezica"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;321596?u&#x3D;8423ec39c6f046851335d192a5837cc0f0336be3&amp;v&#x3D;4" width="60px" alt="Santiago Lezica" /></a><a href="https://github.com/pbwn"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;34809091?u&#x3D;5a0fbe67ca5c1df360398daf2700a5d69ee91904&amp;v&#x3D;4" width="60px" alt="" /></a><a href="https://github.com/timgluz"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;1223889?u&#x3D;a13c54a9e52d336ac32a11b23e4295e47c6caf4c&amp;v&#x3D;4" width="60px" alt="Timo Sulg" /></a><a href="https://github.com/pyrho"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;145502?v&#x3D;4" width="60px" alt="Damien Rajon" /></a><a href="https://github.com/ArtBIT"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;184220?u&#x3D;cc51cc2de93c463e38b11debb64d4bf1c248cfe3&amp;v&#x3D;4" width="60px" alt="ArtBIT" /></a><a href="https://github.com/da-moon"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;17126777?u&#x3D;6b7aeb3f4c9011efba1719ca1d22ba5fd810007a&amp;v&#x3D;4" width="60px" alt="" /></a><a href="https://github.com/hovissimo"><img src="https:&#x2F;&#x2F;avatars.githubusercontent.com&#x2F;u&#x2F;6434414?u&#x3D;e58fccf7558d7e3a4ab209a560afc2cd45460af1&amp;v&#x3D;4" width="60px" alt="Hovis" /></a><a href="https://github.com/dariusjonda"><img src="https:&#x2F;&#x2F;avatars.githubusercontentLine truncated
 
 Table of Contents
 -----------------

go.mod

@@ -6,8 +6,8 @@ require (
 	github.com/junegunn/go-shellwords v0.0.0-20240813092932-a62c48c52e97
 	github.com/mattn/go-isatty v0.0.20
 	github.com/rivo/uniseg v0.4.7
-	golang.org/x/sys v0.24.0
+	golang.org/x/sys v0.25.0
-	golang.org/x/term v0.23.0
+	golang.org/x/term v0.24.0
 )
 
 require (

go.sum

@@ -36,14 +36,14 @@ golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/sys v0.24.0 h1:Twjiwq9dn6R1fQcyiK+wQyHWfaz/BJB+YIpzU/Cv3Xg=
+golang.org/x/sys v0.25.0 h1:r+8e+loiHxRqhXVl6ML1nO3l1+oFoWbnlu2Ehimmi34=
-golang.org/x/sys v0.24.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.25.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
 golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
-golang.org/x/term v0.23.0 h1:F6D4vR+EHoL9/sWAWgAR1H2DcHr4PareCbAaCo1RpuU=
+golang.org/x/term v0.24.0 h1:Mh5cbb+Zk2hqqXNO7S1iTjEphVL+jb8ZWaqh/g+JWkM=
-golang.org/x/term v0.23.0/go.mod h1:DgV24QBUrK6jhZXl+20l6UWznPlwAHm1Q1mGHtydmSk=
+golang.org/x/term v0.24.0/go.mod h1:lOBK/LVxemqiMij05LGJ0tzNr8xlmwBRJ81PX6wVLH8=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=

man/man1/fzf.1

@@ -21,7 +21,7 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ..
-.TH fzf 1 "Aug 2024" "fzf 0.55.0" "fzf - a command-line fuzzy finder"
+.TH fzf 1 "Sep 2024" "fzf 0.56.0" "fzf - a command-line fuzzy finder"
 
 .SH NAME
 fzf - a command-line fuzzy finder
@@ -756,7 +756,7 @@ default value 0 (or \fBcenter\fR) will put the label at the center of the
 border line.
 
 .TP
-.BI "\-\-preview\-window=" "[POSITION][,SIZE[%]][,border\-BORDER_OPT][,[no]wrap][,[no]follow][,[no]cycle][,[no]hidden][,+SCROLL[OFFSETS][/DENOM]][,~HEADER_LINES][,default][,<SIZE_THRESHOLD(ALTERNATIVE_LAYOUT)]"
+.BI "\-\-preview\-window=" "[POSITION][,SIZE[%]][,border\-BORDER_OPT][,[no]wrap][,[no]follow][,[no]cycle][,[no]info][,[no]hidden][,+SCROLL[OFFSETS][/DENOM]][,~HEADER_LINES][,default][,<SIZE_THRESHOLD(ALTERNATIVE_LAYOUT)]"
 
 .RS
 .B POSITION: (default: right)
@@ -790,6 +790,9 @@ e.g.
 
 * Cyclic scrolling is enabled with \fBcycle\fR flag.
 
+* To hide the scroll offset information on the top right corner, specify
+\fBnoinfo\fR.
+
 * To change the style of the border of the preview window, specify one of
 the options for \fB\-\-border\fR with \fBborder\-\fR prefix.
 e.g. \fBborder\-rounded\fR (border with rounded edges, default),

shell/completion.bash

@@ -264,6 +264,7 @@ _fzf_handle_dynamic_completion() {
     # _completion_loader may not have updated completion for the command
     if [[ "$(complete -p "$orig_cmd" 2> /dev/null)" != "$orig_complete" ]]; then
       __fzf_orig_completion < <(complete -p "$orig_cmd" 2> /dev/null)
+      __fzf_orig_completion_get_orig_func "$cmd" || ret=1
 
       # Update orig_complete by _fzf_orig_completion entry
       [[ $orig_complete =~ ' -F '(_fzf_[^ ]+)' ' ]] &&
@@ -282,7 +283,7 @@ _fzf_handle_dynamic_completion() {
 }
 
 __fzf_generic_path_completion() {
-  local cur base dir leftover matches trigger cmd
+  local cur base dir leftover matches trigger cmd rest
   cmd="${COMP_WORDS[0]}"
   if [[ $cmd == \\* ]]; then
     cmd="${cmd:1}"
@@ -294,6 +295,16 @@ __fzf_generic_path_completion() {
     base=${cur:0:${#cur}-${#trigger}}
     eval "base=$base" 2> /dev/null || return
 
+    # Try to leverage existing completion
+    rest=("${@:4}")
+    unset 'rest[${#rest[@]}-2]'
+    COMP_LINE=${COMP_LINE:0:${#COMP_LINE}-${#trigger}}
+    COMP_POINT=$((COMP_POINT-${#trigger}))
+    COMP_WORDS[$COMP_CWORD]=$base
+    _fzf_handle_dynamic_completion "$cmd" "${rest[@]}"
+    [[ $? -ne 0 ]] &&
+      _fzf_handle_dynamic_completion "$cmd" "${rest[@]}"
+
     dir=
     [[ $base = *"/"* ]] && dir="$base"
     while true; do
@@ -305,7 +316,11 @@ __fzf_generic_path_completion() {
         matches=$(
           export FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --scheme=path" "${FZF_COMPLETION_OPTS-} $2")
           unset FZF_DEFAULT_COMMAND FZF_DEFAULT_OPTS_FILE
-          if declare -F "$1" > /dev/null; then
+          if [[ ${#COMPREPLY[@]} -gt 0 ]]; then
+            for h in "${COMPREPLY[@]}"; do
+              echo "$h"
+            done | command sort -u | __fzf_comprun "$4" -q "$leftover"
+          elif declare -F "$1" > /dev/null; then
             eval "$1 $(printf %q "$dir")" | __fzf_comprun "$4" -q "$leftover"
           else
             if [[ $1 =~ dir ]]; then
@@ -373,7 +388,20 @@ _fzf_complete() {
   if [[ "$cur" == *"$trigger" ]] && [[ $cur != *'$('* ]] && [[ $cur != *':='* ]] && [[ $cur != *'`'* ]]; then
     cur=${cur:0:${#cur}-${#trigger}}
 
+    # Try to leverage existing completion
+    COMP_LINE=${COMP_LINE:0:${#COMP_LINE}-${#trigger}}
+    COMP_POINT=$((COMP_POINT-${#trigger}))
+    unset 'rest[${#rest[@]}-2]'
+    _fzf_handle_dynamic_completion "$cmd" "${rest[@]}"
+    [[ $? -ne 0 ]] &&
+      _fzf_handle_dynamic_completion "$cmd" "${rest[@]}"
+
     selected=$(
+      (if [[ ${#COMPREPLY[@]} -gt 0 ]]; then
+        for h in "${COMPREPLY[@]}"; do
+          echo "$h"
+        done
+      fi; cat) | command sort -u |
       FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse" "${FZF_COMPLETION_OPTS-} $str_arg") \
       FZF_DEFAULT_OPTS_FILE='' \
         __fzf_comprun "${rest[0]}" "${args[@]}" -q "$cur" | $post | command tr '\n' ' ')

src/options.go

@@ -120,8 +120,8 @@ Usage: fzf [options]
     --preview=COMMAND       Command to preview highlighted line ({})
     --preview-window=OPT    Preview window layout (default: right:50%)
                             [up|down|left|right][,SIZE[%]]
-                            [,[no]wrap][,[no]cycle][,[no]follow][,[no]hidden]
+                            [,[no]wrap][,[no]cycle][,[no]follow][,[no]info]
-                            [,border-BORDER_OPT]
+                            [,[no]hidden][,border-BORDER_OPT]
                             [,+SCROLL[OFFSETS][/DENOM]][,~HEADER_LINES]
                             [,default][,<SIZE_THRESHOLD(ALTERNATIVE_LAYOUT)]
     --preview-label=LABEL
@@ -271,6 +271,7 @@ type previewOpts struct {
 	wrap        bool
 	cycle       bool
 	follow      bool
+	info        bool
 	border      tui.BorderShape
 	headerLines int
 	threshold   int
@@ -386,7 +387,7 @@ func (a previewOpts) sameLayout(b previewOpts) bool {
 }
 
 func (a previewOpts) sameContentLayout(b previewOpts) bool {
-	return a.wrap == b.wrap && a.headerLines == b.headerLines
+	return a.wrap == b.wrap && a.headerLines == b.headerLines && a.info == b.info
 }
 
 func firstLine(s string) string {
@@ -508,7 +509,7 @@ func filterNonEmpty(input []string) []string {
 }
 
 func defaultPreviewOpts(command string) previewOpts {
-	return previewOpts{command, posRight, sizeSpec{50, true}, "", false, false, false, false, tui.DefaultBorderShape, 0, 0, nil}
+	return previewOpts{command, posRight, sizeSpec{50, true}, "", false, false, false, false, true, tui.DefaultBorderShape, 0, 0, nil}
 }
 
 func defaultOptions() *Options {
@@ -1789,6 +1790,10 @@ func parsePreviewWindowImpl(opts *previewOpts, input string) error {
 			opts.follow = true
 		case "nofollow":
 			opts.follow = false
+		case "info":
+			opts.info = true
+		case "noinfo":
+			opts.info = false
 		default:
 			if headerRegex.MatchString(token) {
 				if opts.headerLines, err = atoi(token[1:]); err != nil {

src/proxy.go

@@ -9,6 +9,7 @@ import (
 	"os/exec"
 	"os/signal"
 	"path/filepath"
+	"regexp"
 	"strings"
 	"time"
 
@@ -32,7 +33,7 @@ func fifo(name string) (string, error) {
 	return output, nil
 }
 
-func runProxy(commandPrefix string, cmdBuilder func(temp string) *exec.Cmd, opts *Options, withExports bool) (int, error) {
+func runProxy(commandPrefix string, cmdBuilder func(temp string, needBash bool) (*exec.Cmd, error), opts *Options, withExports bool) (int, error) {
 	output, err := fifo("proxy-output")
 	if err != nil {
 		return ExitError, err
@@ -92,17 +93,28 @@ func runProxy(commandPrefix string, cmdBuilder func(temp string) *exec.Cmd, opts
 	// To ensure that the options are processed by a POSIX-compliant shell,
 	// we need to write the command to a temporary file and execute it with sh.
 	var exports []string
+	needBash := false
 	if withExports {
-		exports = os.Environ()
+		validIdentifier := regexp.MustCompile(`^[a-zA-Z_][a-zA-Z0-9_]*$`)
-		for idx, pairStr := range exports {
+		for _, pairStr := range os.Environ() {
 			pair := strings.SplitN(pairStr, "=", 2)
-			exports[idx] = fmt.Sprintf("export %s=%s", pair[0], escapeSingleQuote(pair[1]))
+			if validIdentifier.MatchString(pair[0]) {
+				exports = append(exports, fmt.Sprintf("export %s=%s", pair[0], escapeSingleQuote(pair[1])))
+			} else if strings.HasPrefix(pair[0], "BASH_FUNC_") && strings.HasSuffix(pair[0], "%%") {
+				name := pair[0][10 : len(pair[0])-2]
+				exports = append(exports, name+pair[1])
+				exports = append(exports, "export -f "+name)
+				needBash = true
+			}
 		}
 	}
 	temp := WriteTemporaryFile(append(exports, command), "\n")
 	defer os.Remove(temp)
 
-	cmd := cmdBuilder(temp)
+	cmd, err := cmdBuilder(temp, needBash)
+	if err != nil {
+		return ExitError, err
+	}
 	cmd.Stderr = os.Stderr
 	intChan := make(chan os.Signal, 1)
 	defer close(intChan)

src/proxy_unix.go

@@ -9,7 +9,10 @@ import (
 	"golang.org/x/sys/unix"
 )
 
-func sh() (string, error) {
+func sh(bash bool) (string, error) {
+	if bash {
+		return "bash", nil
+	}
 	return "sh", nil
 }
 

src/proxy_windows.go

@@ -13,12 +13,16 @@ import (
 
 var shPath atomic.Value
 
-func sh() (string, error) {
+func sh(bash bool) (string, error) {
 	if cached := shPath.Load(); cached != nil {
 		return cached.(string), nil
 	}
 
-	cmd := exec.Command("cygpath", "-w", "/usr/bin/sh")
+	name := "sh"
+	if bash {
+		name = "bash"
+	}
+	cmd := exec.Command("cygpath", "-w", "/usr/bin/"+name)
 	bytes, err := cmd.Output()
 	if err != nil {
 		return "", err
@@ -31,7 +35,7 @@ func sh() (string, error) {
 
 func mkfifo(path string, mode uint32) (string, error) {
 	m := strconv.FormatUint(uint64(mode), 8)
-	sh, err := sh()
+	sh, err := sh(false)
 	if err != nil {
 		return path, err
 	}
@@ -43,7 +47,7 @@ func mkfifo(path string, mode uint32) (string, error) {
 }
 
 func withOutputPipe(output string, task func(io.ReadCloser)) error {
-	sh, err := sh()
+	sh, err := sh(false)
 	if err != nil {
 		return err
 	}
@@ -62,7 +66,7 @@ func withOutputPipe(output string, task func(io.ReadCloser)) error {
 }
 
 func withInputPipe(input string, task func(io.WriteCloser)) error {
-	sh, err := sh()
+	sh, err := sh(false)
 	if err != nil {
 		return err
 	}

src/terminal.go

@@ -2507,7 +2507,7 @@ func (t *Terminal) renderPreviewSpinner() {
 	spin := t.previewer.spinner
 	if len(spin) > 0 || t.previewer.scrollable {
 		maxWidth := t.pwindow.Width()
-		if !t.previewer.scrollable {
+		if !t.previewer.scrollable || !t.previewOpts.info {
 			if maxWidth > 0 {
 				t.pwindow.Move(0, maxWidth-1)
 				t.pwindow.CPrint(tui.ColPreviewSpinner, spin)

src/tmux.go

@@ -49,9 +49,12 @@ func runTmux(args []string, opts *Options) (int, error) {
 	tmuxArgs = append(tmuxArgs, "-w"+opts.Tmux.width.String())
 	tmuxArgs = append(tmuxArgs, "-h"+opts.Tmux.height.String())
 
-	return runProxy(argStr, func(temp string) *exec.Cmd {
+	return runProxy(argStr, func(temp string, needBash bool) (*exec.Cmd, error) {
-		sh, _ := sh()
+		sh, err := sh(needBash)
+		if err != nil {
+			return nil, err
+		}
 		tmuxArgs = append(tmuxArgs, sh, temp)
-		return exec.Command("tmux", tmuxArgs...)
+		return exec.Command("tmux", tmuxArgs...), nil
 	}, opts, true)
 }

src/winpty_windows.go

@@ -44,11 +44,6 @@ func needWinpty(opts *Options) bool {
 }
 
 func runWinpty(args []string, opts *Options) (int, error) {
-	sh, err := sh()
-	if err != nil {
-		return ExitError, err
-	}
-
 	argStr := escapeSingleQuote(args[0])
 	for _, arg := range args[1:] {
 		argStr += " " + escapeSingleQuote(arg)
@@ -56,20 +51,30 @@ func runWinpty(args []string, opts *Options) (int, error) {
 	argStr += ` --no-winpty`
 
 	if isMintty345() {
-		return runProxy(argStr, func(temp string) *exec.Cmd {
+		return runProxy(argStr, func(temp string, needBash bool) (*exec.Cmd, error) {
+			sh, err := sh(needBash)
+			if err != nil {
+				return nil, err
+			}
+
 			cmd := exec.Command(sh, temp)
 			cmd.Env = append(os.Environ(), "MSYS=enable_pcon")
 			cmd.Stdin = os.Stdin
 			cmd.Stdout = os.Stdout
 			cmd.Stderr = os.Stderr
-			return cmd
+			return cmd, nil
 		}, opts, false)
 	}
 
-	return runProxy(argStr, func(temp string) *exec.Cmd {
+	return runProxy(argStr, func(temp string, needBash bool) (*exec.Cmd, error) {
+		sh, err := sh(needBash)
+		if err != nil {
+			return nil, err
+		}
+
 		cmd := exec.Command(sh, "-c", fmt.Sprintf(`winpty < /dev/tty > /dev/tty -- sh %q`, temp))
 		cmd.Stdout = os.Stdout
 		cmd.Stderr = os.Stderr
-		return cmd
+		return cmd, nil
 	}, opts, false)
 }

test/test_go.rb

@@ -3378,6 +3378,20 @@ class TestGoFZF < TestBase
       assert_equal expected, result
     end
   end
+
+  def test_preview_window_noinfo
+    # │ 1        ││
+    tmux.send_keys %(#{FZF} --preview 'seq 1000' --preview-window top,noinfo --scrollbar --bind space:change-preview-window:info), :Enter
+    tmux.until do |lines|
+      assert lines[1]&.start_with?('│ 1')
+      assert lines[1]&.end_with?('  ││')
+    end
+    tmux.send_keys :Space
+    tmux.until do |lines|
+      assert lines[1]&.start_with?('│ 1')
+      assert lines[1]&.end_with?('1000││')
+    end
+  end
 end
 
 module TestShell