Add language_zsh syntax highlighting for Zsh

manifest.json

@@ -166,13 +166,14 @@
         "language_v": {},
         "language_wren": {},
         "language_yaml": {},
-        "language_zig": {}
+        "language_zig": {},
+        "language_zsh": {}
       },
       "description": "A metapackage containing all publically accessible language syntaxes.",
       "id": "meta_languages",
       "mod_version": "3",
       "type": "meta",
-      "version": "0.1.20"
+      "version": "0.1.21"
     },
     {
       "description": "Align multiple carets and selections *([clip](https://user-images.githubusercontent.com/2798487/165631951-532f8d24-d596-4dd0-9d21-ff53c71ed32f.mp4))*",
@@ -1774,6 +1775,16 @@
       ],
       "version": "0.2"
     },
+    {
+      "description": "Syntax for Zsh shell scripting language",
+      "id": "language_zsh",
+      "mod_version": "3.1",
+      "path": "plugins/language_zsh.lua",
+      "tags": [
+        "language"
+      ],
+      "version": "0.1.0"
+    },
     {
       "description": "Automatically inserts indentation and closing bracket/text after newline",
       "id": "lfautoinsert",

plugins/language_zsh.lua

@@ -0,0 +1,170 @@
+-- mod-version:3.1
+local syntax = require "core.syntax"
+
+local hex = {pattern = "\\[xX][%da-fA-F][%da-fA-F]", type = "function"}
+local backslash_escape = {pattern = "\\.", type = "function"}
+local unicode = {
+	pattern = "\\[uU][%da-fA-F][%da-fA-F][%da-fA-F][%da-fA-F]",
+	type = "function"
+}
+
+local string_interpolation_syntax = {patterns = {}, symbols = {}}
+
+local zsh_syntax = {
+	name = "Zsh",
+	files = {
+		"%.zsh$", PATHSEP .. "%.zshrc$", "%.zshenv$", "%.zprofile$", "%.zlogin$",
+  "%.zlogout$"
+	},
+	headers = "^#!.*zsh%s*.*$",
+	comment = "#",
+	patterns = {
+		-- Comments
+		{pattern = "#.*", type = "comment"}, -- Strings (with interpolation)
+		{
+			pattern = {"\"", "\"", "\\"},
+			type = "string",
+			syntax = string_interpolation_syntax
+		}, {pattern = {"'", "'", "\\"}, type = "string"}, {
+			pattern = {"`", "`", "\\"},
+			type = "string",
+			syntax = string_interpolation_syntax
+		}, {
+			pattern = {"%$%(", "%)", "\\"},
+			type = "string",
+			syntax = string_interpolation_syntax
+		}, -- Numbers
+		{pattern = "%f[%w_%.%/]%d[%d%.]*%f[^%w_%.]", type = "number"},
+  {pattern = "0x[%da-fA-F]+", type = "number"},
+  {pattern = "0[0-7]+", type = "number"}, -- Operators
+		{pattern = "==|!=|<=|>=|<|>", type = "operator"},
+  {pattern = "[=!<>|&%[%]+:%*%-]", type = "operator"},
+  {pattern = "+=", type = "operator"},
+  {pattern = "[%+%-*/%%]=?", type = "operator"},
+  {pattern = "&&|\\|\\||!", type = "operator"}, -- Redirection
+		{
+			pattern = "<<<|>>>|<<|>>|<|>|<>|>\\||\\|&|&>|>&|2>|2>>|2>&1",
+			type = "operator"
+		}, -- Variable expansions
+		{pattern = "%${.-}", type = "keyword2"},
+  {pattern = "%$[%w_]+", type = "keyword2"},
+  {pattern = "%$[%d@#*]", type = "keyword2"}, -- Function definitions
+		{pattern = "%f[%w_]function%s+[%w_]+%s*%(%)", type = "function"},
+  {pattern = "%f[%w_][%w_]+%s*%(%)", type = "function"}, -- Variable assignment
+		{pattern = "[%a_][%w_]*%f[%+=]", type = "keyword2"}, -- Arrays
+		{pattern = "%b()", type = "symbol"}, -- general matching for `(...)`
+		-- All other words
+		{pattern = "[%a_][%w_%-]*", type = "symbol"}
+	},
+
+	symbols = {
+		["if"] = "keyword",
+		["then"] = "keyword",
+		["else"] = "keyword",
+		["elif"] = "keyword",
+		["fi"] = "keyword",
+		["for"] = "keyword",
+		["while"] = "keyword",
+		["until"] = "keyword",
+		["do"] = "keyword",
+		["done"] = "keyword",
+		["in"] = "keyword",
+		["case"] = "keyword",
+		["esac"] = "keyword",
+		["function"] = "keyword",
+		["time"] = "keyword",
+		["coproc"] = "keyword",
+		["repeat"] = "keyword",
+		["select"] = "keyword",
+		["always"] = "keyword",
+
+		-- builtins
+		["alias"] = "keyword",
+		["autoload"] = "keyword",
+		["bg"] = "keyword",
+		["bindkey"] = "keyword",
+		["break"] = "keyword",
+		["builtin"] = "keyword",
+		["cd"] = "keyword",
+		["chdir"] = "keyword",
+		["command"] = "keyword",
+		["compdef"] = "keyword",
+		["compinit"] = "keyword",
+		["continue"] = "keyword",
+		["dirs"] = "keyword",
+		["disable"] = "keyword",
+		["disown"] = "keyword",
+		["echo"] = "keyword",
+		["emulate"] = "keyword",
+		["enable"] = "keyword",
+		["eval"] = "keyword",
+		["exec"] = "keyword",
+		["exit"] = "keyword",
+		["fc"] = "keyword",
+		["fg"] = "keyword",
+		["getopts"] = "keyword",
+		["hash"] = "keyword",
+		["history"] = "keyword",
+		["jobs"] = "keyword",
+		["kill"] = "keyword",
+		["let"] = "keyword",
+		["limit"] = "keyword",
+		["logout"] = "keyword",
+		["popd"] = "keyword",
+		["print"] = "keyword",
+		["pushd"] = "keyword",
+		["pwd"] = "keyword",
+		["read"] = "keyword",
+		["rehash"] = "keyword",
+		["return"] = "keyword",
+		["setopt"] = "keyword",
+		["shift"] = "keyword",
+		["source"] = "keyword",
+		["suspend"] = "keyword",
+		["test"] = "keyword",
+		["times"] = "keyword",
+		["trap"] = "keyword",
+		["true"] = "literal",
+		["false"] = "literal",
+		["ttyctl"] = "keyword",
+		["type"] = "keyword",
+		["ulimit"] = "keyword",
+		["umask"] = "keyword",
+		["unalias"] = "keyword",
+		["unfunction"] = "keyword",
+		["unhash"] = "keyword",
+		["unlimit"] = "keyword",
+		["unset"] = "keyword",
+		["unsetopt"] = "keyword",
+		["vared"] = "keyword",
+		["wait"] = "keyword",
+		["whence"] = "keyword",
+		["where"] = "keyword",
+		["which"] = "keyword",
+		["zcompile"] = "keyword",
+		["zformat"] = "keyword",
+		["zftp"] = "keyword",
+		["zle"] = "keyword",
+		["zmodload"] = "keyword",
+		["zparseopts"] = "keyword",
+		["zprof"] = "keyword",
+		["zpty"] = "keyword",
+		["zregexparse"] = "keyword",
+		["zsocket"] = "keyword",
+		["zstyle"] = "keyword",
+		["ztsched"] = "keyword"
+	}
+}
+
+local function merge_tables(a, b) for _, v in ipairs(b) do table.insert(a, v) end end
+
+merge_tables(string_interpolation_syntax.patterns, {
+	unicode, hex, backslash_escape, {pattern = "%$[%w_]+", type = "keyword2"},
+ {pattern = "%$[@#]", type = "keyword2"},
+ {pattern = "%${.-}", type = "keyword2"},
+ {pattern = {"%$%(%(", "%)%)"}, type = "keyword2", syntax = zsh_syntax},
+ {pattern = {"%$%(", "%)"}, type = "keyword2", syntax = zsh_syntax},
+ {pattern = "[%S][%w]*", type = "string"}
+})
+
+syntax.add(zsh_syntax)