add a script for creating release tags

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

diff --git a/maketag.sh b/maketag.sh
new file mode 100755 (executable)
index 0000000..30435a9
--- /dev/null
+++ b/maketag.sh
@@ -0,0 +1,177 @@
+#!/usr/bin/env bash
+
+git_author="$(git config user.name)"
+git_email="$(git config user.email)"
+gpg_keyid=""
+
+base_url="http://downloads.lede-project.org/releases"
+
+[ -f "./feeds.conf.default" ] || {
+       echo "Please execute as ./${0##*/}" >&2
+       exit 1
+}
+
+usage() {
+       {
+               echo ""
+               echo "Usage: $0 [-i] [-a <Git author>] [-e <Git email>] \\"
+               echo "          [-k <GPG key id>] [-p <GPG passphrase file>] \\"
+               echo "          [-u <Download base url>] -v <version>"
+               echo ""
+               echo "-i"
+               echo "Exit successfully if tag already exists"
+               echo ""
+               echo "-a Git author [$git_author]"
+               echo "Override the author name used for automated Git commits"
+               echo ""
+               echo "-e Git email [$git_email]"
+               echo "Override the email used for automated Git commits"
+               echo ""
+               echo "-k GPG key id [${gpg_keyid:-none}]"
+               echo "Enable GPG signing of tags with given GPG key id"
+               echo ""
+               echo "-p GPG passphrase file [none]"
+               echo "Use the passphrase stored in the given file for signing"
+               echo ""
+               echo "-u Download base url [$base_url]"
+               echo "Use the given URL as base for download repositories"
+               echo ""
+               exit 1
+       } >&2
+}
+
+while getopts "a:e:ik:p:u:v:" opt; do
+       case "$opt" in
+               a) git_author="$OPTARG" ;;
+               e) git_email="$OPTARG" ;;
+               i) ignore_existing=1 ;;
+               k) gpg_keyid="${OPTARG#0x}" ;;
+               p) gpg_passfile="${OPTARG}" ;;
+               u) base_url="${OPTARG%/}" ;;
+               v)
+                       case "$OPTARG" in
+                               [0-9]*.[0-9]*.[0-9]*)
+                                       version="$OPTARG"
+                                       basever="$(echo "$version" | cut -d. -f1-2)"
+                               ;;
+                               *)
+                                       echo "Unexpected version format: $OPTARG" >&2
+                                       exit 1
+                               ;;
+                       esac
+               ;;
+               \?)
+                       echo "Unexpected option: -$OPTARG" >&2
+                       usage
+               ;;
+               :)
+                       echo "Missing argument for option: -$OPTARG" >&2
+                       usage
+               ;;
+       esac
+done
+
+[ -n "$version" ] || usage
+
+if git rev-parse "v${version}^{tag}" >/dev/null 2>/dev/null; then
+       if [ -z "$ignore_existing" ]; then
+               echo "Tag v${version} already exists!" >&2
+               exit 1
+       fi
+
+       exit 0
+fi
+
+revnum="$(./scripts/getver.sh)"
+epoch="$(./scripts/get_source_date_epoch.sh)"
+
+branch="$(git symbolic-ref -q HEAD)"
+
+case "$branch" in
+       *-$basever) : ;;
+       *)
+               echo "Expecting current branch name to end in \"-$basever\"," \
+                    "but it is \"${branch#refs/heads/}\" - aborting."
+
+               exit 1
+       ;;
+esac
+
+export GIT_AUTHOR_NAME="$git_author"
+export GIT_AUTHOR_EMAIL="$git_email"
+export GIT_COMMITTER_NAME="$git_author"
+export GIT_COMMITTER_EMAIL="$git_email"
+
+while read type name url; do
+       case "$type" in
+               src-git)
+                       case "$url" in
+                               *^*)  sha1="${url##*^}" ;;
+                               *\;*) sha1="$(git ls-remote "${url%;*}" "${url##*;}")" ;;
+                               *)    sha1="$(git ls-remote "$url" "master")" ;;
+                       esac
+                       echo "$type $name ${url%[;^]*}${sha1:+^${sha1:0:40}}"
+               ;;
+               src-svn)
+                       case "$url" in
+                               *\;*) rev="${url##*;}" ;;
+                               *)    rev="$(svn log -l 1 "$url" | sed -ne '2s/ .*$//p')" ;;
+                       esac
+                       echo "$type $name ${url%;*}${rev:+;$rev}"
+               ;;
+               src-*)
+                       echo "$type $name $url"
+               ;;
+       esac
+done < feeds.conf.default > feeds.conf.tagged && \
+       mv feeds.conf.tagged feeds.conf.default
+
+sed -e 's!\(VERSION_NUMBER:=\$(if .*\),[^,]*)!\1,'"$version"')!g' \
+    -e 's!\(VERSION_CODE:=\$(if .*\),[^,]*)!\1,'"$revnum"')!g' \
+    -e 's!\(VERSION_REPO:=\$(if .*\),[^,]*)!\1,'"$base_url/$version"')!g' \
+       include/version.mk > include/version.tagged && \
+               mv include/version.tagged include/version.mk
+
+sed -e 's!http://downloads.lede-project.org/[^"]*!'"$base_url/$version"'!g' \
+    -e '/config VERSION_CODE_FILENAMES/ { :next; n; s!default y!default n!; t end; b next }; :end' \
+       package/base-files/image-config.in > package/base-files/image-config.tagged && \
+               mv package/base-files/image-config.tagged package/base-files/image-config.in
+
+echo "$revnum" > version && git add version
+echo "$epoch" > version.date && git add version.date
+
+git commit -sm "LEDE v$version: adjust config defaults" \
+       feeds.conf.default \
+       include/version.mk \
+       package/base-files/image-config.in \
+       version version.date
+
+
+if [ -n "$gpg_keyid" -a -n "$gpg_passfile" ]; then
+       gpg_script="$(tempfile)"
+
+       cat <<-EOT > "$gpg_script"
+               #!/usr/bin/env bash
+               exec $(which gpg) --batch --passphrase-file $gpg_passfile "\$@"
+       EOT
+
+       chmod 0700 "$gpg_script"
+fi
+
+git ${gpg_script:+-c "gpg.program=$gpg_script"} tag \
+       -a "v$version" \
+       -m "LEDE v$version Release" \
+       ${gpg_keyid:+-s -u "$gpg_keyid"}
+
+[ -n "$gpg_script" ] && rm -f "$gpg_script"
+
+git revert --no-edit HEAD
+git commit --amend -sm "LEDE v$version: revert to branch defaults"
+
+git --no-pager show "v$version"
+
+cat <<EOT
+# Push the branch and tag with:
+git push origin "${branch#refs/heads/}"
+git push --follow-tags origin "refs/tags/v$version:refs/tags/v$version"
+EOT