Add split-wezterm: split WezTerm pane into a rows x cols grid
Splits the current pane into evenly-sized grid using wezterm cli split-pane. Supports optional command per pane, dryrun mode, and auto-detects native or Flatpak WezTerm CLI. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Paul O'Reilly
146
scripts/split-wezterm
Executable file
146
scripts/split-wezterm
Executable file
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#!/usr/bin/env bash
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set -euo pipefail
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# split-wezterm — Split the current WezTerm pane into a rows x cols grid
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DRYRUN=false
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usage() {
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cat <<'EOF'
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Usage: split-wezterm [--dryrun|-n] <rows> <cols> [--] [command...]
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Split the current WezTerm pane into an evenly-sized grid.
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Arguments:
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rows Number of rows (1-10)
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cols Number of columns (1-10)
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command... Optional command to run in each new pane
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Flags:
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--dryrun, -n Preview commands without executing
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--help, -h Show this help
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Examples:
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split-wezterm 3 4
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split-wezterm 2 2 -- htop
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split-wezterm --dryrun 3 4 -- claude
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EOF
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}
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die() { echo "Error: $*" >&2; exit 1; }
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# Parse flags
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--help|-h) usage; exit 0 ;;
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--dryrun|-n) DRYRUN=true; shift ;;
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--) shift; break ;;
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-*) die "Unknown flag: $1" ;;
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*) break ;;
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esac
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done
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[[ $# -lt 2 ]] && { usage >&2; exit 1; }
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ROWS="$1"; shift
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COLS="$1"; shift
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# Skip -- separator if present
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[[ "${1:-}" == "--" ]] && shift
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CMD=("$@")
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# Validate dimensions
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[[ "$ROWS" =~ ^[0-9]+$ ]] || die "rows must be a positive integer, got: $ROWS"
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[[ "$COLS" =~ ^[0-9]+$ ]] || die "cols must be a positive integer, got: $COLS"
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(( ROWS >= 1 && ROWS <= 10 )) || die "rows must be 1-10, got: $ROWS"
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(( COLS >= 1 && COLS <= 10 )) || die "cols must be 1-10, got: $COLS"
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if (( ROWS == 1 && COLS == 1 )); then
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echo "Already a single pane, nothing to do."
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exit 0
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fi
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# Detect WezTerm CLI
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detect_cli() {
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if command -v wezterm &>/dev/null; then
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echo "wezterm"
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elif flatpak info org.wezfurlong.wezterm &>/dev/null 2>&1; then
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echo "flatpak run org.wezfurlong.wezterm"
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else
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die "WezTerm CLI not found. Install WezTerm or ensure it's in PATH."
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fi
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}
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WEZTERM_CLI=$(detect_cli)
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# Get the starting pane ID
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if [[ -n "${WEZTERM_PANE:-}" ]]; then
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START_PANE="$WEZTERM_PANE"
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else
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# Try to find the active pane from wezterm cli list
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START_PANE=$($WEZTERM_CLI cli list --format json 2>/dev/null \
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| python3 -c "import sys,json; panes=json.load(sys.stdin); print(panes[0]['pane_id'])" 2>/dev/null) \
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|| die "Cannot determine current pane. Set WEZTERM_PANE or run from inside WezTerm."
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fi
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# Run or preview a wezterm cli command; capture stdout (the new pane ID)
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run_cli() {
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if $DRYRUN; then
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echo "[dryrun] $WEZTERM_CLI cli $*" >&2
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echo "dry-$$-$RANDOM" # fake pane ID for dryrun tracking
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else
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$WEZTERM_CLI cli "$@"
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fi
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}
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# Split a pane into N equal parts along an axis.
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# Usage: split_axis <pane_id> <count> <direction_flag> <result_array_name>
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# direction_flag: --bottom (rows) or --horizontal (cols)
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# Populates the named array with all pane IDs (original + new)
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split_axis() {
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local pane_id="$1" count="$2" direction="$3" result_var="$4"
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local -a pane_ids=("$pane_id")
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local i percent new_pane
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for (( i = 0; i < count - 1; i++ )); do
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percent=$(( (count - 1 - i) * 100 / (count - i) ))
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local cmd_args=(split-pane --pane-id "$pane_id" "$direction" --percent "$percent")
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if [[ ${#CMD[@]} -gt 0 ]]; then
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cmd_args+=(-- "${CMD[@]}")
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fi
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new_pane=$(run_cli "${cmd_args[@]}")
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pane_id="$new_pane"
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pane_ids+=("$new_pane")
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done
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# Copy results to the named variable
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eval "$result_var=(\"\${pane_ids[@]}\")"
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}
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# Step 1: Split into rows
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split_axis "$START_PANE" "$ROWS" "--bottom" row_panes
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# Step 2: Split each row into columns
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for row_pane in "${row_panes[@]}"; do
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if (( COLS > 1 )); then
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split_axis "$row_pane" "$COLS" "--horizontal" _col_panes
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fi
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done
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# Step 3: If a command was given, run it in the original pane too
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if [[ ${#CMD[@]} -gt 0 ]]; then
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cmd_text="${CMD[*]}"
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if $DRYRUN; then
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echo "[dryrun] $WEZTERM_CLI cli send-text --pane-id $START_PANE --no-paste -- \"$cmd_text\"" >&2
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else
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# Send the command text followed by enter
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$WEZTERM_CLI cli send-text --pane-id "$START_PANE" --no-paste -- "$cmd_text
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"
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fi
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fi
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TOTAL=$(( ROWS * COLS ))
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if $DRYRUN; then
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echo "[dryrun] Would create ${ROWS}x${COLS} grid ($TOTAL panes)"
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else
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echo "Created ${ROWS}x${COLS} grid ($TOTAL panes)"
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fi
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