mirror of
https://github.com/neovim/neovim.git
synced 2026-11-06 13:26:57 +00:00
Justin M. Keyes
893d90fced
Problem: - remote_ssh.sh detects ssh disconnect by writing a heartbeat every 1s, which the local side buffers for the whole session. - The server's stdout (e.g. `io.write()` from a random plugin) writes to the tunnel, which in theory may contain a bogus "NVIM_READY". - A nightly install is never updated on the remote. Solution: - Supervise the server in `vim.net._ssh.serve()` (Lua). It detects disconnect via stdin EOF and discards server stdout. The script only finds or installs `nvim`. - Also a step toward Windows remotes. - User may choose "Update Nvim" to reinstall the nightly.
70 lines
2.3 KiB
Bash
70 lines
2.3 KiB
Bash
#!/bin/sh
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# Bootstraps the headless Nvim server of a |remote-ssh| session: finds or installs `nvim`, which then
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# runs and supervises the server (vim.net._ssh.serve()).
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#
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# Usage: remote_ssh.sh [--update] {sock} {dir} {url} [{version}]
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# Runs `nvim` from $PATH if it is {version} or newer, else the release {url}, which it installs
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# to {dir} (relative to $HOME) unless present, or always with --update. E.g.
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# remote_ssh.sh /tmp/nvim-remote.0123abcd/nvim.sock .local/share/nvim-remote/releases/v0.12.0-linux-x86_64 https://…/nvim-linux-x86_64.tar.gz v0.12.0
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set -eu
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# dash (Debian's sh) has no pipefail; tar still fails on an empty or truncated stream.
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# shellcheck disable=SC3040
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if (set -o pipefail) 2>/dev/null; then
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set -o pipefail
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fi
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# Prints the path of `nvim` on $PATH, if it is $want or newer. It checks its own version, so an old
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# or broken one fails.
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# TODO: $PATH is that of a non-login shell, so it may lack e.g. `~/.local/bin`. Could take it from
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# a throwaway login shell: `"$SHELL" -lc 'printf %s "$PATH"'`.
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system_nvim() {
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[ -n "$want" ] || return 1
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nvim=$(command -v nvim) || return 1
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want=$want "$nvim" --clean -es \
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+'lua os.exit(vim.version.ge(vim.version(), os.getenv("want")) and 0 or 1)' \
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</dev/null >/dev/null 2>&1 || return 1
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echo "$nvim"
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}
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# Installs the release to $dest, unless present (and not $update).
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install_release() (
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if [ -x "$dest/bin/nvim" ] && [ -z "$update" ]; then
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exit 0
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fi
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echo "Installing $dest..." >&2
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mkdir -p "${dest%/*}"
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tmp=$(mktemp -d "$dest.XXXXXX")
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trap 'rm -rf "$tmp"' EXIT
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mkdir "$tmp/new"
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curl -fsSL "$url" | tar -xzf - -C "$tmp/new"
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if [ -n "$update" ]; then
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# Removed with $tmp. Gone already if a concurrent update moved it.
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mv "$dest" "$tmp/old" 2>/dev/null || :
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fi
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# The archive holds one top-level dir, e.g. `nvim-linux-x86_64/`. Atomic rename; keeps a
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# concurrent install that finished first.
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[ -e "$dest" ] || mv "$tmp"/new/* "$dest"
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)
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main() {
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update=
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if [ "$1" = --update ]; then
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update=1
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shift
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fi
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sock=$1
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dest="$HOME/$2"
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url=$3
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want=${4-}
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if ! nvim=$(system_nvim); then
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install_release
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nvim="$dest/bin/nvim"
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fi
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# Nvim inherits stdin from `sh -s` (i.e. from ssh), so EOF tells serve() that ssh disconnected.
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exec "$nvim" --clean -n --headless +"lua require('vim.net._ssh').serve('$sock')" +qa!
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}
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main "$@"
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