X-Git-Url: https://git.sev.monster/~sev/dotfiles.git/blobdiff_plain/1f8bf10667234911d96ec1f6c88b43d5b49f90f5..c51966c07c364efb607d48bdb84a78d0509c4cfe:/base/.zprofile

diff --git a/base/.zprofile b/base/.zprofile
index a129213..1abd5b5 100644
--- a/base/.zprofile
+++ b/base/.zprofile
@@ -1,5 +1,331 @@
-case "`uname`" in *BSD*)
-	mkdir -m 700 "/tmp/home-$LOGNAME"
-	unlink "$HOME/tmp"
-	ln -sFh "/tmp/home-$LOGNAME" "$HOME/tmp";;
-esac
+# NOTE:
+# our .zprofile is expensive, so we keep track of what has been run already,
+# and only set up what is necessary. additionally, we want to ensure that our
+# environment is set up as early as possible, so we also source .zprofile in
+# .zshenv for new non-login shells.
+#
+# these issues are handled by using these methods:
+#   * the parent shell that starts the user's session after logging in to some
+#     graphical environments may not be a login shell—due to misconfiguration
+#     or otherwise—which means .zprofile is not ran and the environment is not
+#     properly configured for any child processes.
+#   * some desktop environments/graphical terminal emulators will start new
+#     terminal windows with login shells, which runs .zprofile every time and
+#     leads to noticably slow startup times.
+#   * switching users without wiping the environment will result in paths and
+#     variables intended for the old user being used for the new user. while
+#     this may be considered an edge-case that should not be supported, there
+#     are legitimate reasons to want to do this, and in any case the shell
+#     should not choke or cause unexpected problems should it happen anyway.
+
+### lang
+export CHARSET=UTF-8
+export LANG=en_US.UTF-8
+export LC_CTYPE=$LANG
+### path
+# NOTE: we utilize the fact that unique arrays keep the first occurrence and
+#       remove any further occurences to capture elements from the old PATH
+#       that we did not anticipate and shift them to the front, since they are
+#       probably important to the system
+if [[ ! -v _sev_setup_path || -o login ]] {
+    typeset -U path fpath
+    # add as many generic paths as possible to keep the order we want
+    # NOTE: /usr/{local,pkg,games} are unix/bsdisms
+    syspath=("$path[@]")
+    path=({~,~/.local,,/usr,/opt,/usr/local,/usr/pkg}/sbin
+          {~,~/.local,,/usr,/opt,/usr/local,/usr/pkg}/bin
+          /usr/X11R{7,6}/bin /usr/games)
+    ((len=$#path))
+    path=("$path[@]" "$syspath[@]")
+    # remove nonexistent and duplicate paths
+    for (( i = 1; i <= $#path; i++ )) {
+        if [[ ! -e $path[$i] ]] {
+            path[$i]=()
+            ((i <= len)) && ((len--))
+            ((i--))
+            continue
+        }
+    }
+    # shift valid system paths to the front if there are any left
+    ((len > 0 && len < $#path)) && path=("${(@)path[len + 1, -1]}" "${(@)path[1, len]}")
+    unset syspath len i j
+    # include our zsh dir in fpath. unlike above, we always prefer our paths
+    fpath=(${ZDOTDIR:-~/.zsh}/functions/{*,Completions/*}(N) "$fpath[@]")
+    # FPATH is not exported by default
+    export FPATH
+    typeset +U path fpath
+    export _sev_setup_path=
+}
+
+### temp
+# NOTE: it's intentional to separate POSIX tmp for each session (spec says
+#       programs should not expect data there to be long-lived) and to keep the
+#       same runtime dir and not create a new one if a new login shell is
+#       spawned, since the XDG spec calls for the same dir to be utilized for
+#       each "session".
+if [[ ! -v _sev_setup_tmp ]] {
+    t=${TMPDIR:-${TEMP:-${TMP:-/tmp}}}/.home-$LOGNAME
+    h=~/tmp
+    [[ ! -e $t ]] && mkdir -pm700 $t 2>/dev/null
+    if [[ ! -d $t ]] {
+        [[ -o interactive ]] &&
+          print -P "%F{red}!!! Can't create temp dir $t%f"
+        # fallback bare directories
+        [[ -h $h ]] && unlink $h 2>/dev/null
+        [[ ! -e $h ]] && mkdir -m700 $h 2>/dev/null
+    }
+    # [re-]create link to our tmp
+    [[ -h $h || ! -e $h ]] && ln -sfn $t $h 2>/dev/null
+    # finally create our subdir for this session
+    export _sev_tmp=$h/.session.$$
+    # ensure dir doesn't exist. if there is already something there it is
+    # likely a stale directory or something is very broken—assume the former.
+    # the user could also want dirs recreated by unsetting the var.
+    if [[ -h $_sev_tmp ]] {
+        unlink $_sev_tmp 2>/dev/null
+    } elif [[ -e $_sev_tmp ]] {
+        rm -rf $_sev_tmp 2>/dev/null
+    }
+    mkdir -m700 $_sev_tmp 2>/dev/null
+    export TMPDIR=$_sev_tmp TEMP=$_sev_tmp TMP=$_sev_tmp
+    unset t h
+    export _sev_setup_tmp=
+}
+
+### xdg
+if [[ ! -v _sev_setup_xdg ]] {
+    # merge with any existing dirs and remove duplicates using unique arrays
+    # NOTE: include and then remove CONFIG_HOME and DATA_HOME to ensure they
+    #       are not present in the array if it was added before we got to it
+    typeset -UT XDG_CONFIG_DIRS xdg_config_dirs
+    export XDG_CONFIG_HOME=~/etc
+    mkdir -p $XDG_CONFIG_HOME
+    xdg_config_dirs=($XDG_CONFIG_HOME ~/.config
+      {/opt,/usr/local,/usr/pkg,}/etc/xdg
+      "${XDG_CONFIG_DIRS:+${xdg_config_dirs[@]}}")
+    export XDG_CONFIG_DIRS=${XDG_CONFIG_DIRS#$XDG_CONFIG_HOME}
+
+    typeset -UT XDG_DATA_DIRS xdg_data_dirs
+    export XDG_DATA_HOME=~/share
+    mkdir -p $XDG_DATA_HOME
+    xdg_data_dirs=($XDG_DATA_HOME ~/.local/share
+      /{opt,usr/local,usr/pkg,usr}/share
+      "${XDG_DATA_DIRS:+${xdg_data_dirs[@]}}")
+    export XDG_DATA_DIRS=${XDG_DATA_DIRS#$XDG_DATA_HOME}
+
+    export XDG_STATE_HOME=~/var/lib
+    mkdir -p $XDG_STATE_HOME
+
+    # use our custom tmp for cache and runtime
+    export XDG_CACHE_HOME=$_sev_tmp/.xdg.cache
+    export XDG_RUNTIME_DIR=$_sev_tmp/.xdg.runtime
+    # create xdg tmp dirs
+    for x in $XDG_CACHE_HOME $XDG_RUNTIME_DIR; do
+        # same as in temp creation, ensure it doesn't exist
+        if [[ -h $x ]]; then
+            unlink $x 2>/dev/null
+        elif [[ -e $x ]]; then
+            rm -rf $x 2>/dev/null
+        fi
+        # XXX: cache does not have to be 700 according to spec
+        mkdir -m700 $x 2>/dev/null
+    done
+
+    # source user dirs after other vars
+    [[ -e $XDG_CONFIG_HOME/user-dirs.dirs ]] &&
+      emulate sh -c "source $XDG_CONFIG_HOME/user-dirs.dirs"
+    export _sev_setup_xdg=
+}
+
+### gpg + ssh + forwarding
+# NOTE: while ssh manages its auth sock in its protocol when ForwardSsh is
+#       enabled, GPG must be forwarded manually over Unix socket. to support
+#       this, we forward the restricted gpg-agent extra socket to the remote
+#       host with a RemoteForward rule in ~/.ssh/config that uses the
+#       _GNUPG_SOCK_* env vars. to avoid conflicts with other ssh sessions
+#       where the same user is connecting to the same host from different
+#       machines, gpg in each environment should utilize its own forwarded
+#       socket, rather than replace the sockets in GNUPGHOME which will be
+#       overridden on the next connection. previously, you could provide a path
+#       to the agent socket in GPG_AGENT_INFO, but that was deprecated in GPG
+#       v2.1. instead, we must clone GNUPGHOME with links and replace the agent
+#       sockets there with the forwarded one.
+# NOTE: since Unix sockets are not supported under Windows, this will not work
+#       under msys, cygwin, mingw, etc., but may work under wsl2.
+# HACK: without SendEnv, which is disabled by default in most sshd configs,
+#       there is no foolproof way to prevent race conditions via filename
+#       collisions or to pass the desired forward path to the remote host
+#       environment. we just have to guess the path we choose is good on the
+#       desination, and assume the newest matching socket is the correct one
+#       after connecting. in theory, we could occlude the ssh binary on PATH
+#       with an alias or script that would allow us to communicate with the
+#       remote host before opening a shell, so that we can have the host
+#       communicate back to the client where it wants a socket created or ask
+#       the host if the path the client wants to use is writable. however, this
+#       would open up too many edge cases where it wouldn't work or be clunky
+#       (e.g. asking for password twice) to make it worth it.
+if [[ ! -v _sev_setup_agents ]] {
+    export GNUPGHOME=~/etc/gnupg
+
+    function _socketpath {
+        # dirs are percent-encoded: https://stackoverflow.com/a/64312099
+        echo ${1//(#b)%([[:xdigit:]](#c2))/${(#):-0x$match[1]}}
+    }
+
+    ## gpg forwarding
+    if [[ ! -v _sev_gpg_forwarded && -v commands[gpg] ]] {
+        export _GNUPG_SOCK_DEST_BASE=/tmp/.gpg-agent-forward
+        export _GNUPG_SOCK_DEST_EXT=$(date +%s).$RANDOM
+        export _GNUPG_SOCK_DEST=$_GNUPG_SOCK_DEST_BASE.$_GNUPG_SOCK_DEST_EXT
+        export _sev_gpg_forward_dir=${GNUPGHOME:-~/.gnupg}/.ssh_forward
+        # clean up forward dirs if its session is dead or we ask for it
+        if [[ -d $_sev_gpg_forward_dir ]] {
+            find $_sev_gpg_forward_dir -type d -mindepth 1 -maxdepth 1 |
+              while read -r x; do
+                # NOTE: the only way we can get here is if we have not been
+                #       forwarded before or if the user asks for it. if our own
+                #       pid already has a dir, it is most likely stale, or
+                #       something is very broken—assume the former.
+                p=$(basename $x)
+                if [[ -v _sev_gpg_forward_clean || $$ == $p ]] ||
+                      ! kill -0 $p 2>/dev/null; then
+                    find $x -mindepth 1 -maxdepth 1 | while read -r y; do
+                        unlink $y
+                    done
+                    rmdir $x
+                fi
+            done
+            unset x p y
+        }
+
+        # find our forwarded socket
+        s=($_GNUPG_SOCK_DEST_BASE*(N=oc[1]))
+        if [[ -n $s && -v SSH_CLIENT ]] {
+            # create new forward dir
+            export _sev_gpg_forwarded=
+            mkdir -pm700 $_sev_gpg_forward_dir
+            h=$_sev_gpg_forward_dir/$$
+            mkdir -pm700 $h
+            # XXX: is it safe to link scdaemon socket? can its name be changed?
+            for x in S.scdaemon gpg.conf gpg-agent.conf sshcontrol \
+                     pubring.kbx trustdb.gpg private-keys-v1.d crls.d; do
+                ln -s ${GNUPGHOME:-~/.gnupg}/$x $h
+            done
+            export GNUPGHOME=$h
+            unset h
+            for x in $(gpgconf --list-dirs | grep 'agent-.*-\?socket:'); do
+                x=$(_socketpath ${x/#agent-*socket:})
+                if [[ ! -v orig ]] {
+                    # move forwarded socket to first valid agent socket path
+                    # XXX: if tmp is on different filesystem this may not work
+                    mv $s $x
+                    orig=$x
+                } else {
+                    # make links to forwarded socket for any others
+                    ln -s $orig $x
+                }
+            done
+            unset x orig
+        }
+        unset s
+
+        # what we will forward if we start a new ssh connection
+        # NOTE: do this after setting up GNUPGHOME to pick up new socket path;
+        #       if already connected over SSH, extra should be the remote one
+        export _GNUPG_SOCK_SRC=$(_socketpath \
+          $(gpgconf --list-dirs agent-extra-socket))
+    } else {
+        # required for RemoteForward to not error out if the vars are unset
+        [[ ! -v _GNUPG_SOCK_SRC ]] && export _GNUPG_SOCK_SRC=/nonexistent
+        [[ ! -v _GNUPG_SOCK_DEST ]] && export _GNUPG_SOCK_DEST=/nonexistent
+    }
+
+    ## gpg agent
+    if [[ -v commands[gpg-connect-agent] ]] {
+        [[ -o interactive ]] && print -nP '%F{blue}>>>%f GPG agent: %F{green}'
+        gpg-connect-agent /bye >/dev/null 2>&1
+        if [[ $? -ne 0 ]] {
+            [[ -o interactive ]] &&
+              print -P '%F{red}Error communicating with GPG agent%f'
+        } elif [[ ! -v _sev_gpg_forward && ! -v GPG_TTY &&
+                  ( -o interactive || -v DISPLAY ) ]] {
+            # if we aren't forwarded, set up tty if it isn't and we're
+            # in an interactive session
+            export GPG_TTY=$(tty)
+            export PINENTRY_USER_DATA=USE_TTY=$((!${+DISPLAY}))
+            gpg-connect-agent UPDATESTARTUPTTY /bye >/dev/null 2>&1
+            [[ -o interactive ]] &&
+              print -P "Updated TTY%f"
+        } else {
+            [[ -o interactive ]] &&
+              print -P 'Ready%f'
+        }
+    }
+
+    ## ssh agent
+    # NOTE: preferred order of agents to check: okcagent, gnupg, openssh
+    #       first block takes care of okcagent and openssh, second gnupg
+    [[ -o interactive ]] && print -nP '%F{blue}>>>%f SSH: %F{green}'
+    if [[ ! -v SSH_AUTH_SOCK && ( -v commands[okc-ssh-agent] ||
+          ( -v commands[ssh-agent] && ! -v commands[gpg] ) ) ]] {
+        okc=${commands[okc-ssh-agent]:+okc-}
+        agentfile=~/tmp/${okc}ssh-agent-exports
+        typeset sock=
+        typeset -i pid=
+        if [[ -f $agentfile ]] {
+            IFS=$'\0' read -r sock pid <$agentfile
+        }
+        if [[ -S $sock && $pid > 0 ]] && kill -0 $pid; then
+            [[ -o interactive ]] && print -P "Reusing agent PID $pid%f"
+            export SSH_AUTH_SOCK=$sock
+            export SSH_AGENT_PID=$pid
+        else
+            e=${okc}ssh-agent
+            # TODO: ensure ssh-agent path looks legit to avoid unsafe eval?
+            # XXX: doesn't appear to be any other way to handle redirection.
+            #      because eval needs to write to current scope environment
+            #      subshells can't be used to capture output and print.
+            if [[ -o interactive ]] {
+                eval `$e`
+                print -nP '%f'
+            } else {
+                eval `$e` >/dev/null 2>&1
+            }
+            echo -n $SSH_AUTH_SOCK$'\0'$SSH_AGENT_PID >!$agentfile
+        fi
+        unset okc agentfile sock pid
+    } elif [[ ! -v SSH_AUTH_SOCK && -v commands[gpg] ]] {
+        # since gpg agent was started above, we just have to export and notify
+        if [[ -o interactive ]] {
+            if [[ -v _sev_gpg_forwarded ]] {
+                echo 'Remote GPG agent'
+            } else {
+                gpg-connect-agent /subst /serverpid \
+                  '/echo GPG agent PID ${get serverpid}' /bye
+            }
+            print -nP '%f'
+        }
+        export SSH_AUTH_SOCK=$(_socketpath \
+          $(gpgconf --list-dirs agent-ssh-socket))
+    } elif [[ -v SSH_AUTH_SOCK ]] {
+        [[ -o interactive ]] && print -P 'Preconfigured agent%f'
+    } else {
+        [[ -o interactive ]] && print -P '%F{red}No agent available%f'
+    }
+
+    ## cleanup
+    unfunction _socketpath
+
+    export _sev_setup_agents=
+}
+
+## perl local lib
+# TODO: debounce this
+[[ -v commands[perl] && -d $XDG_DATA_HOME/perl5/lib/perl5 ]] &&
+  eval $(perl -I$XDG_DATA_HOME/perl5/lib/perl5
+              -Mlocal::lib=$XDG_DATA_HOME/perl5 2>/dev/null)
+
+### load site-specific
+if [[ -f ~/.zprofile.local ]] { source ~/.zprofile.local }
+
+# vim: et sts=4 sw=4 ts=8 tw=79