Create gmi to html converter script

The usage is fairly simple just do ./gmi2html.sh FILE

I would recommend using tidy on the final product to format things but a
.gmi file is basically tree-less so its no big deal.

1 files changed, 101 insertions, 0 deletions

diff --git a/gmi2html.sh b/gmi2html.sh
new file mode 100755
index 0000000..165e4c3
--- /dev/null
+++ b/gmi2html.sh
@@ -0,0 +1,101 @@
+#!/usr/bin/env sh
+
+function err {
+    echo "$@" >&2
+}
+
+if [ $# -ne 1 ]; then
+    err "./gmi2html.sh /path/to/gmi"
+    exit 1;
+fi
+
+# main method
+GMI=$1
+list=0
+pre=0
+quote=0
+
+while read line; do
+    # pre formatted text
+    if [ -n "$(sed -nE '/^[`]{3}/p' <<< $line)" ]; then
+	if [ $pre -eq 0 ]; then
+	    echo "<pre>"
+	    pre=1
+	else
+	    echo "</pre>"
+	    pre=0
+	fi
+	continue;
+    fi
+    if [ $pre -eq 1 ]; then
+	echo "$line"
+	continue;
+    fi
+
+    # lists
+    if [ -n "$(sed -nE '/^[*] .+/p' <<< "$line")" ]; then
+	if [ $list -eq 0 ]; then
+	    echo "<ul>"
+	fi
+       	list=1;
+	text=$(sed -E 's/^[*] (.+)$/\1/g' <<< "$line")
+	echo "<li>${text}</li>"
+	continue
+    else
+	if [ $list -eq 1 ]; then
+	    echo "</ul>"
+	fi
+	list=0;
+    fi
+
+    # quotes
+    if [ -n "$(sed -nE '/^[>] .+/p' <<< $line)" ]; then
+	if [ $quote -eq 0 ]; then
+	    echo "<figure><blockquote>"
+	fi
+       	quote=1;
+	text=$(sed -E 's/^[>] (.+)$/\1/g' <<< $line)
+	echo "$text"
+	continue
+    else
+	if [ $quote -eq 1 ]; then
+	    echo "</blockquote></figure>"
+	fi
+	quote=0;
+    fi
+
+    # single line modifiers
+    if [ -n "$(sed -nE '/^# .+/p' <<< $line)" ]; then
+	text=$(sed -E 's/^# (.+)$/\1/g' <<< $line)
+	echo "<h1>$text</h1>"
+	continue
+    fi
+    if [ -n "$(sed -nE '/^## .+/p' <<< $line)" ]; then
+	text=$(sed -E 's/^## (.+)$/\1/g' <<< $line)
+	echo "<h2>$text</h2>"
+	continue
+    fi
+    if [ -n "$(sed -nE '/^### .+/p' <<< $line)" ]; then
+	text=$(sed -E 's/^### (.+)$/\1/g' <<< $line)
+	echo "<h3>$text</h3>"
+	continue
+    fi
+    if [ -n "$(sed -nE '/^=> .+/p' <<< "$line")" ]; then
+	href=$(sed -E 's/^=> ([^ ]+)([ ]?.*)/\1/g' <<< "$line")
+	if [ -n "$(sed -nE '/^=> [^ ]+ .+$/p' <<< "$line")" ]; then
+	    text=$(sed -E 's/^=> [^ ]+ (.+)$/\1/g' <<< "$line")
+	else
+	    text=$href
+	fi
+
+	echo "<p><a href='${href}' rel='noopener' target='_blank'>$text</a></p>"
+	continue
+    fi
+
+    # skip blank lines
+    if [ -z "$line" ]; then
+	continue
+    fi
+    # default paragraphs
+    echo "<p>$line</p>"
+done < $GMI