From 887b40b9d43f89a57646fb3e400f6875c4345f89 Mon Sep 17 00:00:00 2001
From: Sathish Manohar <sathish.design11@gmail.com>
Date: Sat, 15 Oct 2022 02:31:50 +0530
Subject: Add language plugin for ERB files (#131)

* Add language plugin for ERB files

erb files typically has filename.html.erb extension they contain
html markup and embedded ruby code this file should properly
syntax highlight both html and ruby parts

* merge html/htm in filetype check
---
 plugins/language_erb.lua | 55 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 plugins/language_erb.lua

diff --git a/plugins/language_erb.lua b/plugins/language_erb.lua
new file mode 100644
index 0000000..e63c7b0
--- /dev/null
+++ b/plugins/language_erb.lua
@@ -0,0 +1,55 @@
+-- mod-version:2
+local syntax = require "core.syntax"
+
+syntax.add {
+  name = "html-eruby",
+  files = { "%.html?%.erb$", "%.erb$" },
+  block_comment = { "<!--", "-->" },
+  patterns = {
+    {
+      pattern = {
+        "<%s*[sS][cC][rR][iI][pP][tT]%f[%s>].->",
+        "<%s*/%s*[sS][cC][rR][iI][pP][tT]%s*>"
+      },
+      syntax = ".js",
+      type = "function"
+    },
+    {
+      pattern = {
+        "<%s*[sS][tT][yY][lL][eE]%f[%s>].->",
+        "<%s*/%s*[sS][tT][yY][lL][eE]%s*>"
+      },
+      syntax = ".css",
+      type = "function"
+    },
+    {
+      pattern = {
+        "<%%",
+        "%%>"
+      },
+      syntax = ".rb",
+      type = "function"
+    },
+    {
+      pattern = {
+        "<%%=",
+        "%%>"
+      },
+      syntax = ".rb",
+      type = "function"
+    },
+    { pattern = { "<!%-%-", "%-%->" },     type = "comment"  },
+    { pattern = { '%f[^>][^<]', '%f[<]' }, type = "normal"   },
+    { pattern = { '"', '"', '\\' },        type = "string"   },
+    { pattern = { "'", "'", '\\' },        type = "string"   },
+    { pattern = "0x[%da-fA-F]+",           type = "number"   },
+    { pattern = "-?%d+[%d%.]*f?",          type = "number"   },
+    { pattern = "-?%.?%d+f?",              type = "number"   },
+    { pattern = "%f[^<]![%a_][%w_]*",      type = "keyword2" },
+    { pattern = "%f[^<][%a_][%w_]*",       type = "function" },
+    { pattern = "%f[^<]/[%a_][%w_]*",      type = "function" },
+    { pattern = "[%a_][%w_]*",             type = "keyword"  },
+    { pattern = "[/<>=]",                  type = "operator" },
+  },
+  symbols = {},
+}
-- 
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