[zsh] replace base16-shell with a custom colorscheme engine

colorschemes/build.sh

@@ -7,9 +7,10 @@ cd "$(dirname "${BASH_SOURCE[0]}")"
 mkdir -p out
 
 declare -A apps=(
-  [nvim]=vim
   [iterm]=itermcolors
   [kitty]=conf
+  [nvim]=vim
+  [shell]=zsh
   [termux]=properties
 )
 

colorschemes/out/shell.zsh

@@ -0,0 +1,31 @@
+colorscheme_bg=2d2d2d
+colorscheme_fg=d3d0c8
+colorscheme_cursor_bg=d3d0c8
+colorscheme_cursor_fg=2d2d2d
+colorscheme_selection_bg=515151
+colorscheme_selection_fg=d3d0c8
+colorscheme_link_color=6699cc
+colorscheme_ansi_colors=(
+  2d2d2d
+  f2777a
+  99cc99
+  ffcc66
+  6699cc
+  cc99cc
+  66cccc
+  d3d0c8
+  747369
+  f2777a
+  99cc99
+  ffcc66
+  6699cc
+  cc99cc
+  66cccc
+  f2f0ec
+  f99157
+  d27b53
+  393939
+  515151
+  a09f93
+  e8e6df
+)

colorschemes/shell.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+
+import _theme as theme
+
+
+for attr in [
+    "bg",
+    "fg",
+    "cursor_bg",
+    "cursor_fg",
+    "selection_bg",
+    "selection_fg",
+    "link_color",
+]:
+    color = getattr(theme, attr)
+    print("colorscheme_{}={}".format(attr, color[1:]))
+print("colorscheme_ansi_colors=(")
+for color in theme.ansi_colors:
+    print("  {}".format(color[1:]))
+print(")")

zsh/colorscheme.zsh

@@ -0,0 +1,91 @@
+#!/usr/bin/env bash
+# partially based on https://github.com/chriskempson/base16-shell/blob/master/templates/default.mustache
+
+source "$ZSH_DOTFILES/../colorschemes/out/shell.zsh"
+
+if [[ -n "$TMUX" ]]; then
+  # tmux
+  terminal_wrapper=tmux
+elif [[ -n "$STY" ]]; then
+  # GNU Screen
+  terminal_wrapper=screen
+fi
+
+if [[ -z "$terminal_wrapper" ]]; then
+  case "$TERM" in
+    linux*) terminal="linux" ;;
+         *) terminal="xterm" ;;
+  esac
+  export _COLORSCHEME_TERMINAL="$terminal"
+else
+  terminal="${_COLORSCHEME_TERMINAL:-xterm}"
+fi
+
+# when a terminal wrapper is detected certain control sequences are used to
+# send color change control sequences directly to the terminal
+case "$terminal_wrapper" in
+  tmux)
+    # http://permalink.gmane.org/gmane.comp.terminal-emulators.tmux.user/1324
+    _colorscheme_print_ctrl_seq() { print -n "\ePtmux;\e$1\e\\"; }
+    ;;
+  screen)
+    # GNU screen uses the standard DCS (Device Control String) sequence (see
+    # console_codes(4) manpage)
+    _colorscheme_print_ctrl_seq() { print -n "\eP$1\e\\"; }
+    ;;
+  *)
+    _colorscheme_print_ctrl_seq() { print -n "$1"; }
+    ;;
+esac; unset terminal_wrapper
+
+case "$terminal" in
+  linux)
+    _colorscheme_print_osc_seq() {}
+    _colorscheme_set_attr_to_color() {}
+    _colorscheme_set_ansi_color() {
+      # Linux console supports setting only 16 ANSI colors and interestingly
+      # enough uses only 8 of them
+      if (( $1 >= 0 && $1 < 16 )); then
+        _colorscheme_print_ctrl_seq "$(printf "\e]P%X%s" "$1" "$2")"
+      fi
+    }
+    ;;
+  xterm)
+    _colorscheme_print_osc_seq() {
+      _colorscheme_print_ctrl_seq "\e]$1\a";
+    }
+    _colorscheme_set_attr_to_color() {
+      _colorscheme_print_osc_seq "$1;rgb:${2[1,2]}/${2[3,4]}/${2[5,6]}";
+    }
+    _colorscheme_set_ansi_color() {
+      _colorscheme_set_attr_to_color "4;$1" "$2";
+    }
+    ;;
+esac; unset terminal
+
+set-my-colorscheme() {
+  local i; for (( i = 1; i <= ${#colorscheme_ansi_colors}; i++ )); do
+    _colorscheme_set_ansi_color "$((i-1))" "${colorscheme_ansi_colors[$i]}"
+  done
+
+  if [[ -n "$ITERM_SESSION_ID" ]]; then
+    # iTerm2 proprietary escape codes
+    # https://www.iterm2.com/documentation-escape-codes.html
+    _colorscheme_print_osc_seq Pg"$colorscheme_fg"
+    _colorscheme_print_osc_seq Ph"$colorscheme_bg"
+    _colorscheme_print_osc_seq Pi"$colorscheme_fg" # bold
+    _colorscheme_print_osc_seq Pj"$colorscheme_selection_bg"
+    _colorscheme_print_osc_seq Pk"$colorscheme_selection_fg"
+    _colorscheme_print_osc_seq Pl"$colorscheme_cursor_bg"
+    _colorscheme_print_osc_seq Pm"$colorscheme_cursor_fg"
+  else
+    _colorscheme_set_attr_to_color 10 "$colorscheme_fg"
+    _colorscheme_set_attr_to_color 11 "$colorscheme_bg"
+    if [[ "$TERM" = rxvt* ]]; then
+      # internal window border
+      _colorscheme_set_attr_to_color 708 "$colorscheme_bg"
+    fi
+  fi
+}
+
+set-my-colorscheme

zsh/plugins.zsh

@@ -85,9 +85,6 @@ plugin alias-tips 'djui/alias-tips'
 
 plugin ssh 'zpm-zsh/ssh'
 
-plugin base16-shell 'chriskempson/base16-shell' \
-  after_load='export BASE16_SHELL="$plugin_dir"'
-
 FAST_WORK_DIR="$ZSH_CACHE_DIR"
 if [[ "$TERM" != "linux" ]]; then
   plugin fast-syntax-highlighting 'zdharma/fast-syntax-highlighting'

zsh/zshrc

@@ -2,7 +2,7 @@
 
 ZSH_DOTFILES="${0:h}"
 
-for script in functions path env plugins aliases zstyle zle prompt; do
+for script in functions path env plugins aliases zstyle zle prompt colorscheme; do
   source "$ZSH_DOTFILES/$script.zsh"
   source_if_exists "$ZSH_DOTFILES/custom/$script.zsh"
 done
@@ -12,9 +12,6 @@ MANPATH="$MANPATH:"
 
 command_exists rbenv && eval "$(rbenv init -)"
 
-BASE16_SHELL_profile_helper="$BASE16_SHELL/profile_helper.sh"
-[[ -n "$PS1" && -r "$BASE16_SHELL_profile_helper" ]] && eval "$("$BASE16_SHELL_profile_helper")"
-
 setopt noclobber
 
 welcome