www/publish.sh: Make safe to run multiple instances concurrently

Instead of always using the same file (temp.md), use a unique temporary
file so that multiple instances of publish.sh do not clobber each
other's work.

1 files changed, 14 insertions, 9 deletions

diff --git a/www/publish.sh b/www/publish.sh
index 264c95a1..40140728 100755
--- a/www/publish.sh
+++ b/www/publish.sh
@@ -2,6 +2,7 @@
 #
 # Copyright (C) 2017 Alyssa Rosenzweig <alyssa@rosenzweig.io>
 # Copyright (C) 2017 Leah Rowe <info@minifree.org>
+# Copyright (C) 2017 Michael Reed <michael@michaelreed.io>
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -21,8 +22,9 @@ set -e
 
 printf '%s\n' $1
 FILE=${1%.md}
+TMPFILE=$(mktemp -t libreboot_www.XXXXXXXXXX)
 
-cat $1 > temp.md
+cat "$1" > "$TMPFILE"
 
 OPTS="-T Libreboot"
 
@@ -46,29 +48,29 @@ else
 fi
 
 if [[ $FILE = *suppliers ]]; then
-        printf '\n%s\n' "<strong><a href=\"/git.html#editing-the-website-and-documentation-wiki-style\">Edit this page</a></strong> -- <a href=\"../\">Back to previous page</a>" >> temp.md
+        printf '\n%s\n' "<strong><a href=\"/git.html#editing-the-website-and-documentation-wiki-style\">Edit this page</a></strong> -- <a href=\"../\">Back to previous page</a>" >> "$TMPFILE"
 fi
 
 if [ "${FILE}" != "./docs/fdl-1.3" ] && [ "${FILE}" != "./conduct" ]; then
-    cat footer.md >> temp.md
+    cat footer.md >> "$TMPFILE"
 fi
 
 # change out .md -> .html
-sed -i -e 's/\.md\(#[a-z\-]*\)*)/.html\1)/g' temp.md
-sed -i -e 's/\.md\(#[a-z\-]*\)*]/.html\1]/g' temp.md
+sed -i -e 's/\.md\(#[a-z\-]*\)*)/.html\1)/g' "$TMPFILE"
+sed -i -e 's/\.md\(#[a-z\-]*\)*]/.html\1]/g' "$TMPFILE"
 
 # change out .md -> .html
-sed -i -e 's/\.md\(#[a-z\-]*\)*)/.html\1)/g' temp.md
-sed -i -e 's/\.md\(#[a-z\-]*\)*]/.html\1]/g' temp.md
+sed -i -e 's/\.md\(#[a-z\-]*\)*)/.html\1)/g' "$TMPFILE"
+sed -i -e 's/\.md\(#[a-z\-]*\)*]/.html\1]/g' "$TMPFILE"
 
 # work around issue #2872
-TOC=$(grep -q "^x-toc-enable: true$" temp.md && printf '%s\n' "--toc --toc-depth=2") || TOC=""
+TOC=$(grep -q "^x-toc-enable: true$" "$TMPFILE" && printf '%s\n' "--toc --toc-depth=2") || TOC=""
 
 # work around heterogenous pandoc versions
 SMART=$(pandoc -v | grep -q '2\.0' || printf '%s\n' "--smart") || SMART=""
 
 # chuck through pandoc
-pandoc $TOC $SMART temp.md -s --css /global.css $OPTS \
+pandoc $TOC $SMART "$TMPFILE" -s --css /global.css $OPTS \
         --template template.html --metadata return="$RETURN"> $FILE.html
 
 # additionally, produce bare file for RSS
@@ -76,3 +78,6 @@ pandoc $1 > $FILE.bare.html
 
 # generate section title anchors as [link]
 sed -i -e 's_^<h\([123]\) id="\(.*\)">\(.*\)</h\1>_<div class="h"><h\1 id="\2">\3</h\1><a aria-hidden="true" href="#\2">[link]</a></div>_' $FILE.html
+
+# clean up temporary file
+rm -f "$TMPFILE"