From c5c072e8fa60d464296039c4b7ecab6e7887b196 Mon Sep 17 00:00:00 2001
From: Mike Gerwitz <mtg@gnu.org>
Date: Tue, 19 May 2015 01:29:37 -0400
Subject: [PATCH] Release notes on website

---
 .gitignore          | 10 ++++++----
 Makefile            | 12 +++++++++++-
 download.html       |  9 +++++++++
 release-notes.html  |  9 +++++++++
 tools/release-notes | 40 ++++++++++++++++++++++++++++++++++++++++
 5 files changed, 75 insertions(+), 5 deletions(-)
 create mode 100644 release-notes.html
 create mode 100755 tools/release-notes

diff --git a/.gitignore b/.gitignore
index b373fc3..a9c89d1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,6 @@
-node_modules
-webroot
-tools/compiler.jar
-build/
+/node_modules
+/webroot
+/tools/compiler.jar
+/build
+/.release-*.html
+
diff --git a/Makefile b/Makefile
index 67d4b1c..a12dc85 100644
--- a/Makefile
+++ b/Makefile
@@ -34,7 +34,7 @@ output_html := $(addprefix $(outdir)/, $(input_html))
 output_images := $(addprefix $(outdir)/, $(input_images))
 output_scripts := $(addprefix $(outdir)/, $(input_scripts))
 
-.PHONY: default clean news publish
+.PHONY: default clean news publish FORCE
 
 default: $(outdir) $(output_html) $(output_images) \
          $(output_scripts) $(outdir)/style.css $(outdir)/fonts
@@ -54,6 +54,8 @@ $(outdir)/images/%.png: images/%.png | $(outdir)
 $(outdir)/fonts: fonts
 	mkdir -p "$@" && cp $</*.woff "$@"
 
+$(outdir)/download.html: .release-current.html
+$(outdir)/release-notes.html: .release-all.html
 $(outdir)/%.html: %.html $(header) $(footer) tools/page-parse | $(outdir)
 	cat $(header) \
 		| sed 's/\(<body\)/\1 class="$*"/' \
@@ -62,6 +64,12 @@ $(outdir)/%.html: %.html $(header) $(footer) tools/page-parse | $(outdir)
 		| tools/page-parse \
 		> $@
 
+.release-current.html: FORCE
+	./tools/release-notes 1 > $@
+
+.release-all.html: FORCE
+	./tools/release-notes > $@
+
 # requires git-weblog from mikegerwitz's git-supp package
 news:
 	tools/news-fmt < NEWS \
@@ -81,3 +89,5 @@ publish: | default
 
 clean:
 	${RM} -r webroot doc-cp
+
+FORCE:
diff --git a/download.html b/download.html
index 9ba81e9..5fa237c 100644
--- a/download.html
+++ b/download.html
@@ -74,3 +74,12 @@
 See <a href="manual/Integration.html#Integration">Chapter 1 of the manual</a>
 for more information on downloading and integrating ease.js into your own
 projects.
+
+<h3>Release Notes</h3>
+Below are the release notes for the current release of GNU
+ease.js.  <a href="release-notes.html">Historical release notes</a> are also
+available.  GPG signatures for each of the releases and their respective
+notes can be found in their respective tags in the <a href="source.html">Git
+repository</a>.
+
+<!--%inc .release-current.html-->
diff --git a/release-notes.html b/release-notes.html
new file mode 100644
index 0000000..bb4544d
--- /dev/null
+++ b/release-notes.html
@@ -0,0 +1,9 @@
+<p>
+  All historical release notes are included below in descending order,
+  beginning with the <a href="download.html">current release</a>.  GPG
+  signatures for each of the releases and the corresponding notes can be
+  found in their respective tags in the <a href="source.html">Git
+  repository</a>.
+</p>
+
+<!--%inc .release-all.html-->
diff --git a/tools/release-notes b/tools/release-notes
new file mode 100755
index 0000000..e54dd65
--- /dev/null
+++ b/tools/release-notes
@@ -0,0 +1,40 @@
+#!/bin/bash
+
+release-tags() {
+  local -i limit="$1"
+
+  git tag -l '[0-9]*' \
+    | tac \
+    | { test $limit -gt 0 \
+          && head -n$limit \
+          || cat; }
+}
+
+tag-subject() {
+  local tag="${1?Missing tag}"
+
+  git tag -n1 -l "$tag" \
+    | sed 's/ \+/: /'
+}
+
+tag-body() {
+  local tag="${1?Missing tag}"
+
+  git cat-file tag "$tag" \
+    | awk '/^-----BEGIN PGP SIGNATURE-----$/ { exit; }
+           nl>=2 { print; next; }
+           /^$/ { nl++; }' \
+    | sed 's/&/\&amp\;/g
+           s/</\&lt\;/g;
+           s/>/\&gt\;/g;'
+}
+
+# optional limit
+declare -i limit="$1"
+
+for t in $( release-tags "$limit" ); do
+  cat <<EOF
+<h4>$( tag-subject "$t" )</h4>
+<pre>$( tag-body "$t" )</pre>
+EOF
+done