[zsh] improve path.zsh loading speed by not calling the entire rustc

The effects of this were very significant on my good ol' winchester.

nvim/plugin/git.vim

@@ -2,12 +2,11 @@
   let g:gitgutter_map_keys = 0
   nnoremap <leader>gg :G
   nnoremap <leader>g  :Git<space>
-  nnoremap <leader>gs :vertical Git<CR>
-  nnoremap <leader>gd :Gdiffsplit
-  nnoremap <leader>gb :Git blame<CR>
-  nnoremap <leader>gw :GBrowse<CR>
-  nnoremap <leader>gW :.GBrowse<CR>
+  nnoremap <leader>gs :vertical Gstatus<CR>
+  nnoremap <leader>gd :Gdiff
+  nnoremap <leader>gb :Gblame<CR>
+  nnoremap <leader>gw :Gbrowse<CR>
   nnoremap <leader>gc :Gcommit %
-  nnoremap <leader>gl :Gclog<CR>
-  nnoremap <leader>gp :Git push
+  nnoremap <leader>gl :Glog<CR>
+  nnoremap <leader>gp :Gpush
 " }}}

zsh/aliases.zsh

@@ -74,12 +74,7 @@ alias du='du -h'
 alias df='df -h'
 alias free='free -h'
 
-if command_exists apt && command_exists apt-get; then
-  apt_get_message="use 'apt' instead of 'apt-get'
-if you really want to use 'apt-get', type '\\apt-get'"
-  alias apt-get="echo -E ${(qqq)apt_get_message} #"
-  unset apt_get_message
-fi
+alias apt-get="echo -e \"use 'apt' instead of 'apt-get'\nif you really want to use 'apt-get', type '"'\\\\'"apt-get'\" #"
 
 # editor
 alias edit="$EDITOR"
@@ -102,9 +97,3 @@ alias bin-list-dylib-symbols='nm -gD'
 # Duplicated as an alias to prevent autocorrection of the real "command" part.
 # See also scripts/prime-run
 alias prime-run='__NV_PRIME_RENDER_OFFLOAD=1 __VK_LAYER_NV_optimus=NVIDIA_only __GLX_VENDOR_LIBRARY_NAME=nvidia '
-
-if ! command_exists update-grub; then
-  # Doesn't exist on Arch by default. Probably implementing this command was
-  # left as a challenge to the documentation reader.
-  alias update-grub="grub-mkconfig -o /boot/grub/grub.cfg"
-fi

zsh/completion.zsh

@@ -40,12 +40,9 @@ zstyle ':completion:*:processes' force-list always
 
 _completion_get_hosts() {
   print localhost
-  local line
-  < ~/.ssh/config while IFS= read -r line; do
-    if [[ "$line" =~ '^Host[[:blank:]]+(.*)[[:blank:]]*' ]]; then
-      print -- "${match[1]}"
+  if [[ -f ~/.ssh/config ]]; then
+    awk "match(\$0, /^Host[[:blank:]]*/) { print substr(\$0, RLENGTH+1); }" ~/.ssh/config
   fi
-  done
 }
 zstyle -e ':completion:*:hosts' hosts 'reply=("${(@f)$(_completion_get_hosts)}")'
 

zsh/path.zsh

@@ -1,11 +1,9 @@
 #!/usr/bin/env zsh
 
-export PATH
-export MANPATH
-
 # tie these env variables to zsh arrays
-export -T PKG_CONFIG_PATH pkg_config_path ':'
-export -T LD_LIBRARY_PATH ld_library_path ':'
+typeset -T PKG_CONFIG_PATH pkg_config_path ':'
+
+export PKG_CONFIG_PATH PATH MANPATH
 
 path_prepend() {
   if (( $# < 1 )); then
@@ -77,28 +75,24 @@ if [[ -f ~/.rustup/settings.toml ]]; then
   # use of rustup's CLI. Also a shortcut is taken: strings aren't unescaped
   # because Rust toolchain names don't need escaping in strings.
   # See also <https://github.com/toml-lang/toml/blob/master/toml.abnf>.
-  rust_toolchain=""
-  < ~/.rustup/settings.toml while IFS= read -r line; do
-    if [[ "$line" =~ '^default_toolchain = "(.+)"$' ]]; then
-      rust_toolchain="${match[1]}"
-      break
-    elif [[ "$line" == \[*\] ]]; then
-      break
-    fi
-  done; unset line
-
-  if [[ -n "$rust_toolchain" ]]; then
+  if rust_toolchain="$(
+    awk '
+      match($0, /^default_toolchain = "(.+)"$/, matches) {
+        print matches[1];
+        exit;
+      }
+      /^\[.+\]$/ {
+        exit;
+      }
+    ' ~/.rustup/settings.toml
+  )" && [[ -n "$rust_toolchain" ]]; then
     rust_sysroot=~/.rustup/toolchains/"$rust_toolchain"
     path_prepend path "$rust_sysroot"/bin
     path_prepend fpath "$rust_sysroot"/zsh/site-functions
     path_prepend manpath "$rust_sysroot"/share/man
-    path_prepend ld_library_path "$rust_sysroot"/lib
-    unset rust_sysroot
   fi
-
-  unset rust_toolchain
+  unset rust_toolchain rust_sysroot
 fi
-
 path_prepend path ~/.cargo/bin
 
 # add my binaries and completions
@@ -109,12 +103,3 @@ path_prepend fpath "$ZSH_DOTFILES/completions"
 path_prepend path ~/.local/bin
 
 unfunction path_prepend
-
-# For some reason manpath is not always set when logging with ssh for instance.
-# Let's ensure that it is always set and exported. The additional colon ensures
-# that the system manpath isn't overwritten (see manpath(1)).
-if [[ -n "$MANPATH" && "$MANPATH" != *: ]]; then
-  # Append a colon if MANPATH isn't empty and doesn't end with a colon already
-  MANPATH="$MANPATH:"
-fi
-export MANPATH="$MANPATH"

zsh/zshrc

@@ -46,6 +46,14 @@ _perf_timer_start "total"
   fi
 # }}}
 
+# For some reason manpath is not always set when logging with ssh for instance.
+# Let's ensure that it is always set and exported. The additional colon ensures
+# that the system manpath isn't overwritten (see manpath(1)), though in reality
+# two colons get added for some reason, which is also valid, but means
+# something slightly different (again, see manpath(1)). Hope this won't cause
+# any problems in the future.
+export MANPATH="$MANPATH:"
+
 for script in functions options path env plugins aliases completion zle prompt colorscheme; do
   _perf_timer_start "$script.zsh"
   source "$ZSH_DOTFILES/$script.zsh"