chore: add prismjs for syntax highlighting

1 files changed, 75 insertions, 0 deletions

diff --git a/public/prism/prism-dhall.js b/public/prism/prism-dhall.js
new file mode 100644
index 0000000..102a5bd
--- /dev/null
+++ b/public/prism/prism-dhall.js
@@ -0,0 +1,75 @@
+// ABNF grammar:
+// https://github.com/dhall-lang/dhall-lang/blob/master/standard/dhall.abnf
+
+Prism.languages.dhall = {
+  // Multi-line comments can be nested. E.g. {- foo {- bar -} -}
+  // The multi-line pattern is essentially this:
+  //   \{-(?:[^-{]|-(?!\})|\{(?!-)|<SELF>)*-\}
+  comment:
+    /--.*|\{-(?:[^-{]|-(?!\})|\{(?!-)|\{-(?:[^-{]|-(?!\})|\{(?!-))*-\})*-\}/,
+  string: {
+    pattern: /"(?:[^"\\]|\\.)*"|''(?:[^']|'(?!')|'''|''\$\{)*''(?!'|\$)/,
+    greedy: true,
+    inside: {
+      interpolation: {
+        pattern: /\$\{[^{}]*\}/,
+        inside: {
+          expression: {
+            pattern: /(^\$\{)[\s\S]+(?=\}$)/,
+            lookbehind: true,
+            alias: 'language-dhall',
+            inside: null, // see blow
+          },
+          punctuation: /\$\{|\}/,
+        },
+      },
+    },
+  },
+  label: {
+    pattern: /`[^`]*`/,
+    greedy: true,
+  },
+  url: {
+    // https://github.com/dhall-lang/dhall-lang/blob/5fde8ef1bead6fb4e999d3c1ffe7044cd019d63a/standard/dhall.abnf#L596
+    pattern:
+      /\bhttps?:\/\/[\w.:%!$&'*+;=@~-]+(?:\/[\w.:%!$&'*+;=@~-]*)*(?:\?[/?\w.:%!$&'*+;=@~-]*)?/,
+    greedy: true,
+  },
+  env: {
+    // https://github.com/dhall-lang/dhall-lang/blob/5fde8ef1bead6fb4e999d3c1ffe7044cd019d63a/standard/dhall.abnf#L661
+    pattern: /\benv:(?:(?!\d)\w+|"(?:[^"\\=]|\\.)*")/,
+    greedy: true,
+    inside: {
+      function: /^env/,
+      operator: /^:/,
+      variable: /[\s\S]+/,
+    },
+  },
+  hash: {
+    // https://github.com/dhall-lang/dhall-lang/blob/5fde8ef1bead6fb4e999d3c1ffe7044cd019d63a/standard/dhall.abnf#L725
+    pattern: /\bsha256:[\da-fA-F]{64}\b/,
+    inside: {
+      function: /sha256/,
+      operator: /:/,
+      number: /[\da-fA-F]{64}/,
+    },
+  },
+
+  // https://github.com/dhall-lang/dhall-lang/blob/5fde8ef1bead6fb4e999d3c1ffe7044cd019d63a/standard/dhall.abnf#L359
+  keyword:
+    /\b(?:as|assert|else|forall|if|in|let|merge|missing|then|toMap|using|with)\b|\u2200/,
+  builtin: /\b(?:None|Some)\b/,
+
+  boolean: /\b(?:False|True)\b/,
+  number:
+    /\bNaN\b|-?\bInfinity\b|[+-]?\b(?:0x[\da-fA-F]+|\d+(?:\.\d+)?(?:e[+-]?\d+)?)\b/,
+  operator:
+    /\/\\|\/\/\\\\|&&|\|\||===|[!=]=|\/\/|->|\+\+|::|[+*#@=:?<>|\\\u2227\u2a53\u2261\u2afd\u03bb\u2192]/,
+  punctuation: /\.\.|[{}\[\](),./]/,
+
+  // we'll just assume that every capital word left is a type name
+  'class-name': /\b[A-Z]\w*\b/,
+};
+
+Prism.languages.dhall.string.inside.interpolation.inside.expression.inside =
+  Prism.languages.dhall;