build: Add release announcement

1 files changed, 156 insertions, 0 deletions

diff --git a/scripts/announce-release.sh b/scripts/announce-release.sh
new file mode 100755
index 0000000..c7f8dea
--- /dev/null
+++ b/scripts/announce-release.sh
@@ -0,0 +1,156 @@
+#!/bin/sh
+
+set -e
+
+FROM_NAME='Patrick McDermott'
+FROM_EMAIL='patrick.mcdermott@libiquity.com'
+SIG="$(cat <<-EOF
+	Patrick McDermott, CEO
+	Libiquity
+	Putting customers in control of high-quality technologies
+	https://www.libiquity.com/
+	EOF
+	)"
+KEY='2250 31F0 47FF E516 63ED  516F 1A45 9ECD E4D6 04BE'
+TO_EMAIL='proteanos-dev@lists.proteanos.com'
+
+package="${1}"
+version="${2}"
+package_name="${3}"
+srcdir="${0%/scripts/announce-release.sh}"
+
+export GIT_DIR="${srcdir}/.git"
+
+heading()
+{
+	local name="${1}"
+	shift 1
+
+	printf '%s\n' "${name}"
+	printf '%s\n' "${name}" | sed 's/./=/g'
+}
+
+about="$(sed -n '
+	H;
+	${
+		g;
+		s/^\n*[^\n][^\n]*\n[=-][=-]*\n\n*//;
+		s/\n*[^\n][^\n]*\n[=-][=-]*\n.*$//;
+		p;
+	};
+	' "${srcdir}/README")"
+news="$(sed -n '
+	H;
+	${
+		g;
+		s/^\n*[^\n][^\n]*\n[=-][=-]*\n\n*//;
+		s/^Released: [^\n]*\n\n*//;
+		s/\n*[^\n][^\n]*\n[=-][=-]*\n.*$//;
+		p;
+	};
+	' "${srcdir}/NEWS")"
+old_version="$(sed -n "/^${package_name} version /p;" "${srcdir}/NEWS" | \
+	sed -n "2{ s/^${package_name} version / Since Version /p; };")"
+old_tag="$(git tag --sort=-creatordate | sed -n '2{p;q;}')"
+# Empty tree SHA-1 hash:
+[ -z "${old_tag}" ] && old_tag='4b825dc642cb6eb9a060e54bf8d69288fbee4904'
+
+shortlog="$(git shortlog "${old_tag}..HEAD" | \
+	sed '/^..*$/s/^//')"
+if [ $(printf '%s\n' "${shortlog}" | wc -l) -gt 100 ]; then
+	shortlog="$(git shortlog -s "${old_tag}..HEAD"; cat <<-EOF
+
+	Commit descriptions suppressed for brevity.  To see a log summary with
+	descriptions, run:
+
+	    \$ git shortlog ${old_tag}..${package}/${version}
+	EOF
+	)"
+fi
+diffstat="$(git diff --stat=72 --color=never --find-renames=50% \
+	"${old_tag}..HEAD")"
+if [ $(printf '%s\n' "${diffstat}" | wc -l) -gt 50 ]; then
+	diffstat="$(printf '%s\n' "${diffstat}" | tail -n 1; cat <<-EOF
+
+	Difference statistics truncated for brevity.  To see full statistics,
+	run:
+
+	    \$ git diff --stat --find-renames=50% \\
+	    > ${old_tag}..${package}/${version}
+	EOF
+	)"
+fi
+
+message="$({ cat | sed 's/=/=3D/g; s/ $/=20/; s/\t$/=09/;'; } <<-EOF
+	Content-Type: text/plain; charset=UTF-8
+	Content-Transfer-Encoding: quoted-printable
+
+	$(heading 'About')
+
+	${about}
+
+	$(heading 'Downloading')
+
+	Source archives are available from the files site by HTTP or FTP:
+
+	    http://files.proteanos.com/pub/${package}/${version}/
+	    ftp://files.proteanos.com/pub/${package}/${version}/
+
+	Here are the MD5 checksums:
+
+	$(sed 's/^/    /' MD5SUMS)
+
+	Here are the SHA-256 checksums:
+
+	$(sed 's/^/    /' SHA256SUMS)
+
+	The sources are maintained in a Git repository:
+
+	    http://git.proteanos.com/${package}/${package}.git/
+	    git://git.proteanos.com/${package}/${package}.git/
+
+	This release is marked by the "${package}/${version}" tag.
+
+	$(heading "NEWS for Version ${version}")
+
+	${news}
+
+	$(heading "Shortlog of Changes${old_version}")
+
+	${shortlog}
+
+	$(heading "Diffstat of Changes${old_version}")
+
+	${diffstat}
+
+	-- 
+	${SIG}
+	EOF
+	)"
+
+{ sed 's/$/\r/' | /usr/sbin/sendmail -f "${FROM_EMAIL}" \
+	"${TO_EMAIL}"; } <<-EOF
+	Date: $(LC_ALL='POSIX' date '+%a, %d %b %Y %H:%M:%S %z')
+	From: ${FROM_NAME} <${FROM_EMAIL}>
+	To: ${TO_EMAIL}
+	Subject: ${package_name} ${version} released
+	Message-ID: $(LC_ALL='POSIX' date \
+		'+%Y%m%d%H%M%S').${FROM_EMAIL}
+	Organization: Libiquity LLC
+	MIME-Version: 1.0
+	Content-Type: multipart/signed; micalg=pgp-sha256; boundary="=-=-=";
+	 protocol="application/pgp-signature"
+
+	--=-=-=
+	${message}
+
+	--=-=-=
+	Content-Type: application/pgp-signature
+	Content-Description: OpenPGP digital signature
+
+	$(printf '%s\n' "${message}" | sed 's/$/\r/' | \
+		gpg --local-user "${KEY}" --armor --output - \
+		--digest-algo SHA256 --detach-sign)
+
+	--=-=-=--
+	EOF