Split up the bootstrap script to keep its size down
This commit is contained in:
Kovid Goyal
parent
0fd7f3f7b5
commit
0a2768e496
@ -163,6 +163,8 @@ def make_tarfile(ssh_opts: SSHOptions, base_env: Dict[str, str], compression: st
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for ci in ssh_opts.copy.values():
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tf.add(ci.local_path, arcname=ci.arcname, filter=filter_from_globs(*ci.exclude_patterns))
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add_data_as_file(tf, 'data.sh', env_script)
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if compression == 'gz':
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tf.add(f'{shell_integration_dir}/ssh/bootstrap-utils.sh', arcname='bootstrap-utils.sh', filter=normalize_tarinfo)
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if ksi:
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arcname = 'home/' + rd + '/shell-integration'
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tf.add(shell_integration_dir, arcname=arcname, filter=filter_from_globs(
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@ -230,10 +232,6 @@ def prepare_script(ans: str, replacements: Dict[str, str], script_type: str) ->
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def sub(m: 're.Match[str]') -> str:
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return replacements[m.group()]
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if script_type == 'sh':
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# Remove comments and indents. The dropbear SSH server has 9000 bytes limit on ssh arguments length.
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# Needs to be trimmed before replacing EXEC_CMD to avoid affecting the indentation of user commands.
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ans = re.sub(r'^[ \t]*#.*$|^[ \t]*', '', ans, flags=re.MULTILINE)
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return re.sub('|'.join(fr'\b{k}\b' for k in replacements), sub, ans)
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@ -79,9 +79,9 @@ print(' '.join(map(str, buf)))'''), lines=13, cols=77)
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self.ae(parse(conf, '2').env, {'a': 'c', 'b': 'b'})
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def test_ssh_bootstrap_sh_cmd_limit(self):
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# dropbear has a 9000 bytes maximum command length limit
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sh_script, _, _ = bootstrap_script(SSHOptions({'interpreter': 'sh'}), script_type='sh', remote_args=[], request_id='123-123')
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rcmd = wrap_bootstrap_script(sh_script, 'sh')
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# dropbear has a 9000 bytes maximum command length limit
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self.assertLessEqual(sum(len(x) for x in rcmd), 9000)
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@property
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162
shell-integration/ssh/bootstrap-utils.sh
Normal file
162
shell-integration/ssh/bootstrap-utils.sh
Normal file
@ -0,0 +1,162 @@
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#! /bin/bash
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#
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# bootstrap-utils.sh
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# Copyright (C) 2022 Kovid Goyal <kovid at kovidgoyal.net>
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#
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# Distributed under terms of the MIT license.
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#
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compile_terminfo() {
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tname=".terminfo"
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# Ensure the 78 dir is present
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if [ ! -f "$1/$tname/78/xterm-kitty" ]; then
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command mkdir -p "$1/$tname/78"
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command ln -sf "../x/xterm-kitty" "$1/$tname/78/xterm-kitty"
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fi
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if [ -e "/usr/share/misc/terminfo.cdb" ]; then
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# NetBSD requires this file, see https://github.com/kovidgoyal/kitty/issues/4622
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command ln -sf "../../.terminfo.cdb" "$1/$tname/x/xterm-kitty"
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tname=".terminfo.cdb"
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fi
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# export TERMINFO
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export TERMINFO="$HOME/$tname"
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# compile terminfo for this system
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if [ -x "$(command -v tic)" ]; then
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tic_out=$(command tic -x -o "$1/$tname" "$1/.terminfo/kitty.terminfo" 2>&1)
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[ $? = 0 ] || die "Failed to compile terminfo with err: $tic_out"
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fi
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}
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parse_passwd_record() {
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printf "%s" "$(command grep -o '[^:]*$')"
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}
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login_shell_is_ok() {
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[ -n "$1" ] && login_shell=$(echo $1 | parse_passwd_record)
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[ -n "$login_shell" -a -x "$login_shell" ] && return 0
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return 1
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}
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using_getent() {
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cmd=$(command -v getent) && [ -n "$cmd" ] && output=$(command "$cmd" passwd "$USER" 2>/dev/null) \
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&& login_shell_is_ok "$output"
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}
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using_id() {
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cmd=$(command -v id) && [ -n "$cmd" ] && output=$(command "$cmd" -P "$USER" 2>/dev/null) \
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&& login_shell_is_ok "$output"
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}
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using_python() {
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detect_python && output=$(command "$python" -c "import pwd, os; print(pwd.getpwuid(os.geteuid()).pw_shell)") \
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&& login_shell="$output" && login_shell_is_ok
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}
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using_perl() {
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detect_perl && output=$(command "$perl" -e 'my $shell = (getpwuid($<))[8]; print $shell') \
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&& login_shell="$output" && login_shell_is_ok
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}
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using_passwd() {
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[ -f "/etc/passwd" -a -r "/etc/passwd" ] && output=$(command grep "^$USER:" /etc/passwd 2>/dev/null) \
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&& login_shell_is_ok "$output"
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}
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using_shell_env() {
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[ -n "$SHELL" ] && login_shell="$SHELL" && login_shell_is_ok
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}
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execute_with_python() {
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if detect_python; then
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exec "$python" "-c" "import os; os.execlp('$login_shell', '-' '$shell_name')"
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fi
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return 1
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}
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execute_with_perl() {
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if detect_perl; then
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exec "$perl" "-e" "exec {'$login_shell'} '-$shell_name'"
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fi
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return 1
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}
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exec_zsh_with_integration() {
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zdotdir="$ZDOTDIR"
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if [ -z "$zdotdir" ]; then
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zdotdir=~
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else
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export KITTY_ORIG_ZDOTDIR="$zdotdir"
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fi
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# dont prevent zsh-newuser-install from running
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if [ -f "$zdotdir/.zshrc" -o -f "$zdotdir/.zshenv" -o -f "$zdotdir/.zprofile" -o -f "$zdotdir/.zlogin" ]; then
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export ZDOTDIR="$shell_integration_dir/zsh"
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exec "$login_shell" "-l"
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fi
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# ensure this is not propagated
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unset KITTY_ORIG_ZDOTDIR
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}
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exec_fish_with_integration() {
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if [ -z "$XDG_DATA_DIRS" ]; then
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export XDG_DATA_DIRS="$shell_integration_dir"
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else
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export XDG_DATA_DIRS="$shell_integration_dir:$XDG_DATA_DIRS"
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fi
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export KITTY_FISH_XDG_DATA_DIR="$shell_integration_dir"
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exec "$login_shell" "-l"
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}
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exec_bash_with_integration() {
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export ENV="$shell_integration_dir/bash/kitty.bash"
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export KITTY_BASH_INJECT="1"
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if [ -z "$HISTFILE" ]; then
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export HISTFILE="$HOME/.bash_history"
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export KITTY_BASH_UNEXPORT_HISTFILE="1"
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fi
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exec "$login_shell" "--posix"
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}
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exec_with_shell_integration() {
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[ -z "$shell_integration_dir" ] && return
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case "$shell_name" in
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"zsh")
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exec_zsh_with_integration
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;;
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"fish")
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exec_fish_with_integration
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;;
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"bash")
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exec_bash_with_integration
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;;
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esac
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}
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execute_sh_with_posix_env() {
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# only for sh as that is likely to be POSIX compliant
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[ "$shell_name" = "sh" ] || return
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# sh supports -l so use that
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command "$login_shell" -l -c ":" > /dev/null 2> /dev/null && return
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[ -z "$shell_integration_dir" ] && die "Could not read data over tty ssh kitten cannot function"
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sh_dir="$shell_integration_dir/sh"
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command mkdir -p "$sh_dir" || die "Creating $sh_dir failed"
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sh_script="$sh_dir/login_shell_env.sh"
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# Source /etc/profile, ~/.profile, and then check and source ENV
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printf "%s" '
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if [ -n "$KITTY_SH_INJECT" ]; then
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unset ENV; unset KITTY_SH_INJECT
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_ksi_safe_source() { [ -f "$1" -a -r "$1" ] || return 1; . "$1"; return 0; }
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[ -n "$KITTY_SH_POSIX_ENV" ] && export ENV="$KITTY_SH_POSIX_ENV"
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unset KITTY_SH_POSIX_ENV
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_ksi_safe_source "/etc/profile"; _ksi_safe_source "${HOME-}/.profile"
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[ -n "$ENV" ] && _ksi_safe_source "$ENV"
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unset -f _ksi_safe_source
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fi' > "$sh_script"
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export KITTY_SH_INJECT="1"
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[ -n "$ENV" ] && export KITTY_SH_POSIX_ENV="$ENV"
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export ENV="$sh_script"
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exec "$login_shell"
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}
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@ -87,30 +87,6 @@ mv_files_and_dirs() {
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cd "$cwd"
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}
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compile_terminfo() {
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tname=".terminfo"
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# Ensure the 78 dir is present
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if [ ! -f "$1/$tname/78/xterm-kitty" ]; then
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command mkdir -p "$1/$tname/78"
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command ln -sf "../x/xterm-kitty" "$1/$tname/78/xterm-kitty"
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fi
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if [ -e "/usr/share/misc/terminfo.cdb" ]; then
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# NetBSD requires this file, see https://github.com/kovidgoyal/kitty/issues/4622
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command ln -sf "../../.terminfo.cdb" "$1/$tname/x/xterm-kitty"
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tname=".terminfo.cdb"
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fi
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# export TERMINFO
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export TERMINFO="$HOME/$tname"
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# compile terminfo for this system
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if [ -x "$(command -v tic)" ]; then
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tic_out=$(command tic -x -o "$1/$tname" "$1/.terminfo/kitty.terminfo" 2>&1)
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[ $? = 0 ] || die "Failed to compile terminfo with err: $tic_out"
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fi
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}
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read_base64_from_tty() {
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while IFS= read -r line; do
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[ "$line" = "KITTY_DATA_END" ] && return 0
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@ -125,8 +101,8 @@ untar_and_read_env() {
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[ $? = 0 ] || die "Creating temp directory failed"
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# suppress STDERR for tar as tar prints various warnings if for instance, timestamps are in the future
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read_base64_from_tty | base64_decode | command tar "xpzf" "-" "-C" "$tdir" 2> /dev/null
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data_file="$tdir/data.sh"
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[ -f "$data_file" ] && . "$data_file"
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. "$tdir/bootstrap-utils.sh"
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. "$tdir/data.sh"
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[ -z "$KITTY_SSH_KITTEN_DATA_DIR" ] && die "Failed to read SSH data from tty"
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data_dir="$HOME/$KITTY_SSH_KITTEN_DATA_DIR"
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shell_integration_dir="$data_dir/shell-integration"
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@ -168,59 +144,6 @@ if [ -n "$leading_data" ]; then
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fi
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[ -f "$HOME/.terminfo/kitty.terminfo" ] || die "Incomplete extraction of ssh data"
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parse_passwd_record() {
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printf "%s" "$(command grep -o '[^:]*$')"
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}
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login_shell_is_ok() {
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[ -n "$1" ] && login_shell=$(echo $1 | parse_passwd_record)
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[ -n "$login_shell" -a -x "$login_shell" ] && return 0
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return 1
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}
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using_getent() {
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cmd=$(command -v getent) && [ -n "$cmd" ] && output=$(command "$cmd" passwd "$USER" 2>/dev/null) \
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&& login_shell_is_ok "$output"
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}
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using_id() {
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cmd=$(command -v id) && [ -n "$cmd" ] && output=$(command "$cmd" -P "$USER" 2>/dev/null) \
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&& login_shell_is_ok "$output"
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}
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using_python() {
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detect_python && output=$(command "$python" -c "import pwd, os; print(pwd.getpwuid(os.geteuid()).pw_shell)") \
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&& login_shell="$output" && login_shell_is_ok
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}
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using_perl() {
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detect_perl && output=$(command "$perl" -e 'my $shell = (getpwuid($<))[8]; print $shell') \
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&& login_shell="$output" && login_shell_is_ok
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}
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using_passwd() {
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[ -f "/etc/passwd" -a -r "/etc/passwd" ] && output=$(command grep "^$USER:" /etc/passwd 2>/dev/null) \
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&& login_shell_is_ok "$output"
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}
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using_shell_env() {
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[ -n "$SHELL" ] && login_shell="$SHELL" && login_shell_is_ok
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}
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execute_with_python() {
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if detect_python; then
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exec "$python" "-c" "import os; os.execlp('$login_shell', '-' '$shell_name')"
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fi
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return 1
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}
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execute_with_perl() {
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if detect_perl; then
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exec "$perl" "-e" "exec {'$login_shell'} '-$shell_name'"
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fi
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return 1
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}
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if [ -n "$KITTY_LOGIN_SHELL" ]; then
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login_shell="$KITTY_LOGIN_SHELL"
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unset KITTY_LOGIN_SHELL
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@ -233,83 +156,6 @@ shell_name=$(command basename $login_shell)
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# If a command was passed to SSH execute it here
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EXEC_CMD
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exec_zsh_with_integration() {
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zdotdir="$ZDOTDIR"
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if [ -z "$zdotdir" ]; then
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zdotdir=~
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else
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export KITTY_ORIG_ZDOTDIR="$zdotdir"
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fi
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# dont prevent zsh-newuser-install from running
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if [ -f "$zdotdir/.zshrc" -o -f "$zdotdir/.zshenv" -o -f "$zdotdir/.zprofile" -o -f "$zdotdir/.zlogin" ]; then
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export ZDOTDIR="$shell_integration_dir/zsh"
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exec "$login_shell" "-l"
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fi
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# ensure this is not propagated
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unset KITTY_ORIG_ZDOTDIR
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}
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exec_fish_with_integration() {
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if [ -z "$XDG_DATA_DIRS" ]; then
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export XDG_DATA_DIRS="$shell_integration_dir"
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else
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export XDG_DATA_DIRS="$shell_integration_dir:$XDG_DATA_DIRS"
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fi
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export KITTY_FISH_XDG_DATA_DIR="$shell_integration_dir"
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exec "$login_shell" "-l"
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}
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exec_bash_with_integration() {
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export ENV="$shell_integration_dir/bash/kitty.bash"
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export KITTY_BASH_INJECT="1"
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if [ -z "$HISTFILE" ]; then
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export HISTFILE="$HOME/.bash_history"
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export KITTY_BASH_UNEXPORT_HISTFILE="1"
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fi
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exec "$login_shell" "--posix"
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}
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exec_with_shell_integration() {
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[ -z "$shell_integration_dir" ] && return
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case "$shell_name" in
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"zsh")
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exec_zsh_with_integration
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;;
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"fish")
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exec_fish_with_integration
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;;
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"bash")
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exec_bash_with_integration
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;;
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esac
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}
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execute_sh_with_posix_env() {
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# only for sh as that is likely to be POSIX compliant
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[ "$shell_name" = "sh" ] || return
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# sh supports -l so use that
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command "$login_shell" -l -c ":" > /dev/null 2> /dev/null && return
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[ -z "$shell_integration_dir" ] && die "Could not read data over tty ssh kitten cannot function"
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sh_dir="$shell_integration_dir/sh"
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command mkdir -p "$sh_dir" || die "Creating $sh_dir failed"
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sh_script="$sh_dir/login_shell_env.sh"
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# Source /etc/profile, ~/.profile, and then check and source ENV
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printf "%s" '
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if [ -n "$KITTY_SH_INJECT" ]; then
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unset ENV; unset KITTY_SH_INJECT
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_ksi_safe_source() { [ -f "$1" -a -r "$1" ] || return 1; . "$1"; return 0; }
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[ -n "$KITTY_SH_POSIX_ENV" ] && export ENV="$KITTY_SH_POSIX_ENV"
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unset KITTY_SH_POSIX_ENV
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_ksi_safe_source "/etc/profile"; _ksi_safe_source "${HOME-}/.profile"
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[ -n "$ENV" ] && _ksi_safe_source "$ENV"
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unset -f _ksi_safe_source
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fi' > "$sh_script"
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export KITTY_SH_INJECT="1"
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[ -n "$ENV" ] && export KITTY_SH_POSIX_ENV="$ENV"
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export ENV="$sh_script"
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exec "$login_shell"
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}
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# Used in the tests
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TEST_SCRIPT
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