finish the owl

mgmarlow · Mar 2, 2024 · 48a544d · 48a544d
1 parent d868fa0
commit 48a544d
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Showing 6 changed files with 795 additions and 13 deletions.
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1 @@
+*~
diff --git a/LICENSE b/LICENSE
diff --git a/Makefile b/Makefile
@@ -0,0 +1,2 @@
+web:
+	awk -v head='  <link rel="stylesheet" href="https://cdn.simplecss.org/simple.min.css">' -f awkdown.awk README.md > demo.html
diff --git a/README.md b/README.md
@@ -8,16 +8,28 @@ A Markdown renderer written in Awk.
 awk -f awkdown.awk README.md
 ```
 
+---
+
 ## Demo
 
-### Subsection one
+Here's an [example link](https://www.mgmarlow.com/).
+
+How about some _italicized text_? Maybe you're *feeling bold* instead.
+
+# Header one
+
+## Header two
+
+### Header three
+
+#### Header four
 
-**Todos:**
+Unordered list:
 
 - Buy trail mix
 - Eat trail mix
 
-_numbered list_:
+Numbered list:
 
 1. Do one thing
 2. Do another thing

diff --git a/awkdown.awk b/awkdown.awk
@@ -3,6 +3,7 @@ BEGIN {
     print "<head>"
     print "  <meta charset=\"utf-8\">"
     print "  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">"
+    if (head) print head
     print "</head>"
     print "<body>"
 }
@@ -11,29 +12,83 @@ BEGIN {
 
 END {
     for (i = 1; i <= NR; i++)
-        render_line(data[i])
+        render(data[i])
 
-    # Flush any remaining open tags
-    if (inq)
-        render_line()
+    # Catch any trailing unclosed tags
+    if (inq) render()
 
     print "</body>"
     print "</html>"
 }
 
-function render_line(line) {
+function render(line) {
+    if (line !~ /^> / && inquote) {
+        print "</blockquote>"
+        inquote = 0
+    }
+
+    if (line !~ /^- / && inul) {
+        print "</ul>"
+        inul = 0
+    }
+
+    if (line !~ /^[0-9]+. / && inol) {
+        print "</ol>"
+        inol = 0
+    }
+
+    if (match(line, /_(.*)_/, pats)) {
+        gsub(/_(.*)_/, sprintf("<em>%s</em>", pats[1]), line)
+    }
+
+    if (match(line, /\*(.*)\*/, pats)) {
+        gsub(/\*(.*)\*/, sprintf("<strong>%s</strong>", pats[1]), line)
+    }
+
+    if (match(line, /(.*)\[(.+)\]\((.+)\)(.*)/, pats)) {
+        gsub(/(.*)\[(.+)\]\((.+)\)(.*)/,
+             sprintf("%s<a href='%s'>%s</a>%s", pats[1], pats[3], pats[2], pats[4]), line)
+    }
+
     if (line ~ /^# /) {
         print "<h1>" substr(line, 3) "</h1>"
     } else if (line ~ /^## /) {
         print "<h2>" substr(line, 4) "</h2>"
+    } else if (line ~ /^### /) {
+        print "<h3>" substr(line, 5) "</h3>"
+    } else if (line ~ /^#### /) {
+        print "<h4>" substr(line, 6) "</h4>"
+    } else if (line ~ /^- /) {
+        if (!inul) {
+            print "<ul>"
+            inul = 1
+        }
+        print "<li>" substr(line, 3) "</li>"
+    } else if (line ~ /^[0-9]+. /) {
+        if (!inol) {
+            print "<ol>"
+            inol = 1
+        }
+        print "<li>" substr(line, 4) "</li>"
     } else if (line ~ /^> /) {
-        if (!inq) {
+        if (!inquote) {
             print "<blockquote>"
-            inq = 1
+            inquote = 1
         }
         print substr(line, 3)
-    } else if (line !~ /^> / && inq) {
-        print "</blockquote>"
-        inq = 0
+    } else if (line ~ /^```/) {
+        if (!inpre) {
+            print "<pre>"
+            inpre = 1
+        } else {
+            print "</pre>"
+            inpre = 0
+        }
+    } else if (inpre) {
+        print line
+    } else if (line ~ /^---$/) {
+        print "<hr />"
+    } else if (line !~ /^$/) {
+        print "<p>" line "</p>"
     }
 }
diff --git a/demo.html b/demo.html
@@ -0,0 +1,38 @@
+<!doctype html><html>
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link rel="stylesheet" href="https://cdn.simplecss.org/simple.min.css">
+</head>
+<body>
+<h1>Awkdown</h1>
+<p>A Markdown renderer written in Awk.</p>
+<h2>Usage</h2>
+<pre>
+awk -f awkdown.awk README.md
+</pre>
+<hr />
+<h2>Demo</h2>
+<p>Here's an <a href='https://www.mgmarlow.com/'>example link</a>.</p>
+<p>How about some <em>italicized text</em>? Maybe you're <strong>feeling bold</strong> instead.</p>
+<h1>Header one</h1>
+<h2>Header two</h2>
+<h3>Header three</h3>
+<h4>Header four</h4>
+<p>Unordered list:</p>
+<ul>
+<li>Buy trail mix</li>
+<li>Eat trail mix</li>
+</ul>
+<p>Numbered list:</p>
+<ol>
+<li>Do one thing</li>
+<li>Do another thing</li>
+<li>Do the last thing</li>
+</ol>
+<blockquote>
+Deep in the human unconscious is a pervasive need for a logical
+universe that makes sense. But the real universe is always one step
+beyond logic. - Frank Herbert
+</body>
+</html>
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		web:
		awk -v head=' <link rel="stylesheet" href="https://cdn.simplecss.org/simple.min.css">' -f awkdown.awk README.md > demo.html