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Integrate features from @andreypopp #1

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43 changes: 40 additions & 3 deletions dntw.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -28,21 +28,58 @@ function dntw_edit () {
local DNTW_NVIM_CMD="${DNTW_NVIM_CMD:-nvim}"
# Ensure that we're running inside a dntw session
if [[ ! -z "$TMUX" ]] && [[ ! -z "$DNTW_ID" ]]; then
# This window ID is global for all tmux sessions and won't change if windows are rearranged
# This window ID is unique across all tmux sessions and won't change if windows are rearranged
local TMUX_WINDOW_ID=$(tmux display-message -p '#{window_id}')
if [[ -z "$TMUX_WINDOW_ID" ]]; then
>&2 echo "dntw error: Could not determine tmux window ID!"
return 1
fi
local NVIM_TMUX_PANE_ID_KEY="dntw_${DNTW_ID}_${TMUX_WINDOW_ID}"
local NVIM_LISTEN_ADDRESS="/${TMPDIR-/tmp/}dntw_${DNTW_ID}_${TMUX_WINDOW_ID}"
if [ $(nvr --serverlist | grep -ic "$NVIM_LISTEN_ADDRESS") -eq 1 ]; then
# A dedicated nvim is already running for this tmux window; reuse it
NVR_CMD="$DNTW_NVIM_CMD" nvr --servername "$NVIM_LISTEN_ADDRESS" "$@"
NVR_CMD="$DNTW_NVIM_CMD" nvr --nostart --servername "$NVIM_LISTEN_ADDRESS" "$@"
# Attempt to automatically focus nvim by selecting its pane
# `tmux showenv` output format is `key=value`; `key=` needs to be stripped out
local NVIM_TMUX_PANE_ID="${$(tmux showenv "${NVIM_TMUX_PANE_ID_KEY}" 2> /dev/null)##${NVIM_TMUX_PANE_ID_KEY}=}"
if [[ ! -z "$NVIM_TMUX_PANE_ID" ]]; then
tmux select-pane -t "${NVIM_TMUX_PANE_ID}"
fi
else
# A dedicated nvim is not yet running for this tmux window, start one
# A dedicated nvim is not yet running for this tmux window;
# start one and remember which pane it's running in
local NVIM_TMUX_PANE_ID=$(tmux display-message -p '#{pane_id}')
if [[ -z "$NVIM_TMUX_PANE_ID" ]]; then
>&2 echo "dntw error: Could not determine tmux pane ID!"
return 1
fi
tmux setenv "${NVIM_TMUX_PANE_ID_KEY}" "${NVIM_TMUX_PANE_ID}"
NVIM_LISTEN_ADDRESS="$NVIM_LISTEN_ADDRESS" "$DNTW_NVIM_CMD" "$@"
fi
else
"$DNTW_NVIM_CMD" "$@"
fi
}

# Exactly like `dntw_edit` above, but works outside dntw sessions/inside an existing tmux session,
# and can thus be used without running `dntw` first.
# Useful when you only want a dedicated nvim in specifc tmux windows.
# Can be aliased independently from `dntw_edit` above.
#
# Advanced usage:
# This even works inside an existing dntw session, which makes it possible to have two nvim instances
# per window where one is controlled by `dntw_edit` and the other is controlled by `dntw_edit_unmanaged`,
# but this gets confusing quickly.
function dntw_edit_unmanaged () {
local DNTW_ID=""
if [[ ! -z "$TMUX" ]]; then
local TMUX_SESSION_ID=$(tmux display-message -p '#{session_id}')
if [[ -z "$TMUX_SESSION_ID" ]]; then
>&2 echo "dntw error: Could not determine tmux session ID!"
return 1
fi
DNTW_ID="dntw_${TMUX_SESSION_ID}"
fi
# Uses generated $DNTW_ID that corresponds to the existing tmux session (if any)
dntw_edit "$@"
}