From 549144450bb975957b58e3086a396c51bff60b4e Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Thu, 3 May 2018 11:44:47 +0200
Subject: release: create, sign and upload tar ball

---
 release | 123 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100755 release

diff --git a/release b/release
new file mode 100755
index 0000000..17eac93
--- /dev/null
+++ b/release
@@ -0,0 +1,123 @@
+#!/bin/sh
+
+base_dir=$(
+  dirname "$(
+    readlink -f "$0"
+  )"
+)
+git_dir=$(
+  pwd
+)
+
+api_url='https://api.github.com'
+auth='Authorization: token '"$(
+  gpg -d -o - "${base_dir}/pw.gpg" 2>/dev/null
+)"
+
+if [ -n "$(git status --porcelain 2>&1)" ]; then
+  >&2 echo 'Error: git state is not clean.'
+  exit 1
+fi
+
+if [ -n "$1" ]; then
+  tag="$1"
+  shift
+else
+  tag="v$(date +'%Y%m%d')"
+fi
+
+if [ $# -ne 0 ] || [ -z "${tag}" ]; then
+  >&2 echo 'usage:'
+  >&2 echo '  release $tag'
+  >&2 echo 'or'
+  >&2 echo '  release'
+  exit 1
+fi
+
+owner=$(basename "$(dirname "${git_dir}")")
+repo=$(basename "${git_dir}")
+
+repo_url="${api_url}/repos/${owner}/${repo}"
+tags_url="${repo_url}/releases/tags/${tag}"
+
+>&2 printf 'Try to authenticate ...'
+response=$(
+  curl -sH "${auth}" "${repo_url}"
+)
+
+if echo "${response}" | \
+  grep -qF '"Bad credentials"'; then
+  >&2 printf '\nError: Bad credentials.\n'
+  >&2 printf '%s\n' "${response}"
+  exit 1
+fi
+>&2 printf ' ok.\n'
+
+>&2 printf 'Creating tag ...'
+if ! git tag -s -m "Release ${tag}" "${tag}"; then
+  >&2 printf '\nError: Failed to create tag %s.\n' "${tag}"
+  exit 1
+fi
+>&2 printf ' ok.\n'
+
+tmp_dir=$(mktemp -d)
+trap 'rm -rf --one-file-system "${tmp_dir:?}"' EXIT
+
+>&2 printf 'Creating and signing tarball ...'
+git archive "${tag}" | \
+  xz -9 > \
+  "${tmp_dir}/${repo}-${tag}.tar.xz"
+if ! gpg --detach-sign --local-user erich@eckner.net --local-user arch@eckner.net "${tmp_dir}/${repo}-${tag}.tar.xz"; then
+  >&2 printf '\nError: Failed to sign release tarball.\n'
+  exit 1
+fi
+>&2 printf ' ok.\n'
+
+>&2 printf 'Pushing tags ...'
+if ! git push --tags; then
+  >&2 printf '\nError: Failed to push tags.\n'
+  exit 1
+fi
+>&2 printf ' ok.\n'
+
+>&2 printf 'Creating release from tag ...'
+response=$(
+  printf '"%s": "%s"\n' \
+    'tag_name' "${tag}" \
+    'name' "${tag}" \
+    'body' "Release ${tag}" | \
+    sed '
+      s/^/  /
+      1 i {
+      $! s/$/,/
+      $ a }
+    ' | \
+    curl -sH "${auth}" -d @- "${repo_url}/releases"
+)
+eval $(
+  printf '%s\n' "${response}" | \
+    grep -m1 '"id":' | \
+    tr : = | \
+    tr -cd '[[:alnum:]]='
+)
+if [ -z "${id}" ]; then
+  >&2 printf '\nError: Failed to create/get release id for tag %s.\n' "${tag}"
+  >&2 printf '%s\n' "${response}"
+  exit 1
+fi
+>&2 printf ' ok.\n'
+
+>&2 printf 'Uploading tarball and signature ...'
+for suffix in '' '.sig'; do
+
+  upload_url="https://uploads.github.com/repos/${owner}/${repo}/releases/${id}/assets?name=${repo}-${tag}.tar.xz${suffix}"
+
+  curl \
+    --data-binary @"${tmp_dir}/${repo}-${tag}.tar.xz${suffix}" \
+    -H "${auth}" \
+    -H "Content-Type: application/octet-stream" \
+    "${upload_url}"
+  printf '\n'
+
+done
+>&2 printf ' ok.\n'
-- 
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