skel/dotfiles/shenv

#!/bin/sh
# Sourced by zshrc as well as bash.
# Should only use POSIX shell constructs.
# shellcheck shell=sh

umask 027

# Paths and preferences
export PYTHONPATH="$HOME/.python:$PYTHONPATH"
export GOPATH="$HOME/go:$HOME/Projects/Go:/usr/share/gocode"
export PATH="$HOME/bin:$HOME/bin/tools:/sbin:/usr/sbin:$PATH:$HOME/go/bin:$HOME/.npm-packages/bin"
export VISUAL=vim
export EDITOR=vim
export DEBEMAIL="david@systemoverlord.com"
export DEBFULLNAME="David Tomaschik"
export LESS="-MR"
export QUOTING_STYLE="literal"  # Coreutils quotes
export HOMEBREW_NO_ENV_HINTS=1

# Fix gnome-terminal
if [ "$TERM" = "xterm" ] && [ "$COLORTERM" = "gnome-terminal" ] ; then
  # Requires `ncurses-base` package for terminfo.
  export TERM="xterm-256color"
fi

# For virtualenvwrapper
export WORKON_HOME="$HOME/.virtualenvs"

# GPG full key id
export GPG_ID=7FD58D9A196DCEEEAD671F94F4D7A7915DEA789B

# things we need in all interactive shells
case "$-" in
  *i*)
    # Terminal preferences for i3
    if [ -z "${TERMINAL}" ] ; then
      for t in urxvt gnome-terminal; do
        if TERMINAL=$(command -v ${t}) ; then
          export TERMINAL
        fi
      done
    fi

    # Browser preferences
    if [ -z "${BROWSER}" ] ; then
      for t in google-chrome-beta google-chrome firefox ; do
        if BROWSER=$(command -v ${t}); then
          export BROWSER
          break
        fi
      done
    fi

    # Setup locale
    if test -x /usr/bin/locale ; then
      for l in en_US.utf8 en_US.UTF-8 C.UTF-8 C.utf8 C ; do
        if /usr/bin/locale -a | grep -q "${l}" ; then
          export LC_CTYPE=${l}
          export LC_NUMERIC=${l}
          export LC_TIME=${l}
          export LC_MONETARY=${l}
          export LC_MESSAGES=${l}
          export LC_PAPER=${l}
          export LC_NAME=${l}
          export LC_ADDRESS=${l}
          export LC_TELEPHONE=${l}
          export LC_MEASUREMENT=${l}
          export LC_IDENTIFICATION=${l}
          break
        fi
      done
    else
      export LC_CTYPE=C
      export LC_NUMERIC=C
      export LC_TIME=C
      export LC_MONETARY=C
      export LC_MESSAGES=C
      export LC_PAPER=C
      export LC_NAME=C
      export LC_ADDRESS=C
      export LC_TELEPHONE=C
      export LC_MEASUREMENT=C
      export LC_IDENTIFICATION=C
    fi
    export LC_COLLATE=C
    ;;
esac


# Opt out of .net telemetry
export DOTNET_CLI_TELEMETRY_OPTOUT=1

# Suppress lvm warnings
export LVM_SUPPRESS_FD_WARNINGS=1

# Default disable SSH forwarding in EARTHLY
export EARTHLY_SSH_AUTH_SOCK=""

# Handle SSH_AUTH_SOCK for tmux consistency
_SSH_AUTH_LINK="${HOME}/.ssh/ssh_auth_sock"

# Helper to check if a path is our link or points to it
_is_link_path() {
  [ -z "$1" ] && return 1
  [ "$1" = "${_SSH_AUTH_LINK}" ] && return 0
  if [ -L "$1" ] && command -v readlink >/dev/null 2>&1; then
    _T=$(readlink "$1")
    # Handle relative symlinks
    case "${_T}" in /*) ;; *) _T="$(dirname "$1")/${_T}" ;; esac
    [ "${_T}" = "${_SSH_AUTH_LINK}" ] && return 0
  fi
  return 1
}

_CANDIDATE=""

# 1. If current environment has a valid socket that is NOT our link, it's a prime candidate
# (e.g. fresh SSH login: sshd sets SSH_AUTH_SOCK to the raw forwarded socket before ssh/rc
# rewrites it to the stable symlink; the shell inherits the original raw path).
if [ -S "${SSH_AUTH_SOCK:-}" ] && ! _is_link_path "${SSH_AUTH_SOCK}"; then
  _CANDIDATE="${SSH_AUTH_SOCK}"
fi

# 2. Only look for a system agent if the stable link is already broken.  If the link is
# valid (e.g. a tmux pane where SSH_AUTH_SOCK points to our symlink which ssh/rc just
# updated to the forwarded socket), leave it alone — don't clobber it with a local agent.
if [ -z "${_CANDIDATE}" ] && [ ! -S "${_SSH_AUTH_LINK}" ]; then
  _FOUND=""
  if [ "$(uname)" = "Darwin" ]; then
    _FOUND=$(launchctl getenv SSH_AUTH_SOCK 2>/dev/null)
  elif command -v systemctl >/dev/null 2>&1; then
    # Query systemd socket units directly to avoid environment overrides.
    for _u in ssh-agent.socket openssh-agent.socket gcr-ssh-agent.socket gpg-agent-ssh.socket; do
      _P=$(systemctl --user show "${_u}" -p Listen 2>/dev/null | cut -d= -f2- | cut -d' ' -f1)
      if [ -S "${_P}" ]; then
        _FOUND="${_P}"
        break
      fi
    done
    # Fallback to systemd environment
    if [ -z "${_FOUND}" ] || _is_link_path "${_FOUND}"; then
      _FOUND=$(systemctl --user show-environment 2>/dev/null | grep "^SSH_AUTH_SOCK=" | cut -d= -f2-)
    fi
  fi

  if [ -S "${_FOUND}" ] && ! _is_link_path "${_FOUND}"; then
    _CANDIDATE="${_FOUND}"
  fi
fi

# 3. Last resort: search common paths if we still don't have a candidate and the link is broken.
if [ ! -S "${_CANDIDATE}" ] && [ ! -S "${_SSH_AUTH_LINK}" ]; then
  _U=$(id -u)
  for _p in "/run/user/${_U}/keyring/ssh" "/run/user/${_U}/ssh-agent.socket" "/run/user/${_U}/openssh_agent" "/run/user/${_U}/gnupg/S.gpg-agent.ssh"; do
    if [ -S "${_p}" ] && ! _is_link_path "${_p}"; then
      _CANDIDATE="${_p}"
      break
    fi
  done
  if [ -z "${_CANDIDATE}" ]; then
    # Build search path list based on what actually exists
    _SEARCH=""
    for _d in "/run/user/${_U}" /tmp; do [ -d "${_d}" ] && _SEARCH="${_SEARCH} ${_d}"; done
    if [ -n "${_SEARCH}" ]; then
      _CANDIDATE=$(find ${_SEARCH} -maxdepth 2 -type s -name 'agent.*' 2>/dev/null | grep -F -v "${_SSH_AUTH_LINK}" | head -n 1)
    fi
  fi
fi

# 4. Sync the stable link if we found a valid "real" socket.
if [ -S "${_CANDIDATE}" ] && ! _is_link_path "${_CANDIDATE}"; then
  mkdir -p "$(dirname "${_SSH_AUTH_LINK}")"
  ln -sf "${_CANDIDATE}" "${_SSH_AUTH_LINK}"
  export SSH_AUTH_SOCK="${_SSH_AUTH_LINK}"
  # Update systemd if present to keep everything in sync
  if command -v systemctl >/dev/null 2>&1; then
    systemctl --user set-environment SSH_AUTH_SOCK="${_SSH_AUTH_LINK}" 2>/dev/null
  fi
elif [ -S "${_SSH_AUTH_LINK}" ]; then
  # If we found nothing better but the link is valid, use it.
  export SSH_AUTH_SOCK="${_SSH_AUTH_LINK}"
fi

unset _SSH_AUTH_LINK _CANDIDATE _FOUND _T _P _U _u _SEARCH _d
unset -f _is_link_path

# Setup XDG-like dirs on MacOS
# Based on https://leebyron.com/til/mac-xdg/
if [ "$(uname)" = "Darwin" ] ; then
  export XDG_BIN_HOME="${XDG_BIN_HOME:-$HOME/.local/bin}"
  export XDG_CACHE_HOME="${XDG_CACHE_HOME:-$HOME/Library/Caches}"
  export XDG_CONFIG_HOME="${XDG_CONFIG_HOME:-$HOME/.config}"
  export XDG_DATA_HOME="${XDG_DATA_HOME:-$HOME/.local/share}"
  # Using id -u for better POSIX compatibility than $UID
  export XDG_RUNTIME_DIR="${XDG_RUNTIME_DIR:-$TMPDIR/runtime-$(id -u)}"
  export XDG_STATE_HOME="${XDG_STATE_HOME:-$HOME/.local/state}"
  export PATH="${HOME}/bin/macos:${PATH}"
elif [ "$(uname)" = "Linux" ] ; then
  export PATH="${HOME}/bin/linux:${PATH}"
fi

if test -e "$HOME/.localenv"; then
  # shellcheck source=/dev/null
  . "$HOME/.localenv"
else
  true
fi