chore: add prismjs for syntax highlighting

1 files changed, 77 insertions, 0 deletions

diff --git a/public/prism/prism-systemd.js b/public/prism/prism-systemd.js
new file mode 100644
index 0000000..c22232f
--- /dev/null
+++ b/public/prism/prism-systemd.js
@@ -0,0 +1,77 @@
+// https://www.freedesktop.org/software/systemd/man/systemd.syntax.html
+
+(function (Prism) {
+  var comment = {
+    pattern: /^[;#].*/m,
+    greedy: true,
+  };
+
+  var quotesSource = /"(?:[^\r\n"\\]|\\(?:[^\r]|\r\n?))*"(?!\S)/.source;
+
+  Prism.languages.systemd = {
+    comment: comment,
+
+    section: {
+      pattern: /^\[[^\n\r\[\]]*\](?=[ \t]*$)/m,
+      greedy: true,
+      inside: {
+        punctuation: /^\[|\]$/,
+        'section-name': {
+          pattern: /[\s\S]+/,
+          alias: 'selector',
+        },
+      },
+    },
+
+    key: {
+      pattern: /^[^\s=]+(?=[ \t]*=)/m,
+      greedy: true,
+      alias: 'attr-name',
+    },
+    value: {
+      // This pattern is quite complex because of two properties:
+      //  1) Quotes (strings) must be preceded by a space. Since we can't use lookbehinds, we have to "resolve"
+      //     the lookbehind. You will see this in the main loop where spaces are handled separately.
+      //  2) Line continuations.
+      //     After line continuations, empty lines and comments are ignored so we have to consume them.
+      pattern: RegExp(
+        /(=[ \t]*(?!\s))/.source +
+          // the value either starts with quotes or not
+          '(?:' +
+          quotesSource +
+          '|(?=[^"\r\n]))' +
+          // main loop
+          '(?:' +
+          (/[^\s\\]/.source +
+            // handle spaces separately because of quotes
+            '|' +
+            '[ \t]+(?:(?![ \t"])|' +
+            quotesSource +
+            ')' +
+            // line continuation
+            '|' +
+            /\\[\r\n]+(?:[#;].*[\r\n]+)*(?![#;])/.source) +
+          ')*'
+      ),
+      lookbehind: true,
+      greedy: true,
+      alias: 'attr-value',
+      inside: {
+        comment: comment,
+        quoted: {
+          pattern: RegExp(/(^|\s)/.source + quotesSource),
+          lookbehind: true,
+          greedy: true,
+        },
+        punctuation: /\\$/m,
+
+        boolean: {
+          pattern: /^(?:false|no|off|on|true|yes)$/,
+          greedy: true,
+        },
+      },
+    },
+
+    operator: /=/,
+  };
+})(Prism);