Add reload feature

Until now the REPL executed the shell command once, and you could not
reload the json.

Now if you hit Ctrl+R the shell command is re-run and you can see the
preview with the updated JSON input.

README.md

@@ -20,6 +20,7 @@ on your PATH.
 
 The project consists of two components:
 - a `jq-repl` command
+- a `jq-paths` command
 - a `jq.plugin.zsh` providing line-editor feature using `jq-repl`
 
 
@@ -55,13 +56,14 @@ During interactive querying, the following shortcuts can be used:
 
 | Shortcut | Effect |
 | ------ | -------- |
-| up | Navigate path queries |
-| down | Navigate path queries |
-| tab | Select path query |
+| `up` | Navigate path queries |
+| `down` | Navigate path queries |
+| `tab` | Select path query |
 | `shift + up` | Scroll up |
 | `shift + down` | Scroll down |
 | `alt + up` | Scroll up full page |
 | `alt + down` | Scroll down full page |
+| `ctrl+r` | Reload input |
 
 ## Demos
 

bin/jq-paths

@@ -0,0 +1,7 @@
+#!/usr/bin/env jq -r -f
+# path logic inspired by https://github.com/stedolan/jq/issues/243
+[
+  path(..) |
+  map(select(type=="string") // "[]") |
+  join(".") | split(".[]") | join("[]")
+] | map("." + .) | unique | .[]

bin/jq-repl

@@ -1,22 +1,33 @@
 #!/bin/sh
-if [ -z "$1" ] || [ "$1" = "-" ]; then
-    input=$(mktemp)
-    trap 'rm -f "$input"' EXIT
-    cat /dev/stdin > "$input"
+#
+# if 1st arg is '-' read from stdin
+# if 1st arg is '--' take the command after it verbatim and execute it to get the input
+# if 1st arg is anything else, treat it as a file
+set -eu
+
+if [ -n "${1:-}" ] && [ "$1" != "-" ] && [ "$1" != "--" ]; then
+  input="$1"
+else
+  input=$(mktemp)
+  trap 'rm -f "$input"' EXIT
+fi
+
+if [ -z "${1:-}" ] || [ "$1" = "-" ]; then
+  cat /dev/stdin >"$input"
+fi
+if [ "${1:-}" = "--" ]; then
+  shift
+  export FZF_JQ_REPL_COMMAND="$* > $input; jq-paths <$input"
 else
-    input="$1"
+  export FZF_JQ_REPL_COMMAND="jq-paths < $input"
 fi
 
-# path logic inspired by https://github.com/stedolan/jq/issues/243
-<"$input" jq -r '[
-    path(..) |
-    map(select(type=="string") // "[]") |
-    join(".") | split(".[]") | join("[]")
-  ] | map("." + .) | unique | .[]' |
-fzf \
-    --preview "jq --color-output $JQ_REPL_ARGS {q} \"$input\"" \
+eval "$FZF_JQ_REPL_COMMAND" |
+  fzf \
+    --preview "jq --color-output ${JQ_REPL_ARGS:-} {q} \"$input\"" \
     --preview-window="down:90%" \
     --height="99%" \
     --query="." \
     --bind "tab:replace-query,return:print-query" \
-    --bind "alt-up:preview-page-up,alt-down:preview-page-down"
+    --bind "alt-up:preview-page-up,alt-down:preview-page-down" \
+    --bind "ctrl-r:reload($FZF_JQ_REPL_COMMAND)+refresh-preview"

jq.plugin.zsh

@@ -1,7 +1,7 @@
 if [[ -o zle ]]; then
 
 __get_query() {
-    eval "$LBUFFER" | jq-repl
+    jq-repl -- ${LBUFFER}
     return $?
 }