init

README.md

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+# Tmux Capture Last Command Output
+
+Capture the output of the last terminal command and open it an editor in a separate tmux window. 
+
+## Installation
+
+### Using [TPM](https://github.com/tmux-plugins/tpm):
+
+    set -g @plugin 'artemave/tmux_capture_last_command_output'
+
+Hit <kbd>prefix</kbd> + <kbd>I</kbd> to fetch and source the plugin.
+
+### Manual
+
+Clone the repo:
+
+    git clone https://github.com/artemave/tmux_capture_last_command_output.git ~/.tmux/plugins/tmux_capture_last_command_output
+
+Source it in your `.tmux.conf`:
+
+    run-shell ~/.tmux/plugins/tmux_capture_last_command_output/tmux_capture_last_command_output.tmux
+
+Reload TMUX conf by running:
+
+    tmux source-file ~/.tmux.conf
+
+## Configuration
+
+#### @command-capture-key
+
+Required. Set Prefix + key to trigger the plugin. For example, `prefix+t`:
+
+```
+set -g @command-capture-key t
+```
+
+#### @command-capture-prompt-pattern
+
+Required. A regexp to identify command separator. Usually a prompt. E.g., if set to '] % ', the plugin will capture the latest output up until the first line that contains '] % ':
+
+```
+set -g @command-capture-prompt-pattern '] % '
+```
+
+#### @command-capture-editor-cmd
+
+Optional. An editor to use for the captured output. Defaults to `$EDITOR -`, which works with vim/nvim. Example:
+
+```
+set -g @command-capture-editor-cmd 'nvim -'
+```

plugin.sh

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+#!/usr/bin/env bash
+
+x=$(tmux capture-pane -p -J -t !)
+readarray -t pane_contents <<<"$x"
+
+# reverse loop through pane contents lines
+for (( idx=${#pane_contents[@]}-2 ; idx>=0 ; idx-- )) ; do
+  line=${pane_contents[idx]}
+
+  # strip trailing whitespace from line
+  line=$(sed 's/[[:space:]]*$//' <<<"$line")
+
+  if [[ $line =~ $PROMPT_PATTERN ]]; then
+    break
+  fi
+
+  # prepend line to result array
+  result="$line"$'\n'"$result"
+done
+
+EDITOR_CMD=${EDITOR_CMD:-"$EDITOR -"}
+
+echo "$result" | $EDITOR_CMD

tmux_capture_last_command_output.tmux

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+#!/usr/bin/env bash
+
+CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+default_capture_key="t"
+CAPTURE_KEY=$(tmux show-option -gqv @command-capture-key)
+CAPTURE_KEY=${CAPTURE_KEY:-$default_capture_key}
+
+PROMPT_PATTERN=$(tmux show-option -gqv @command-capture-prompt-pattern)
+EDITOR_CMD=$(tmux show-option -gqv @command-capture-editor-cmd)
+
+tmux bind $CAPTURE_KEY new-window -n last-command-output -e PROMPT_PATTERN="$PROMPT_PATTERN" -e EDITOR_CMD="$EDITOR_CMD" "$CURRENT_DIR/plugin.sh"