add release script

release.sh

@@ -0,0 +1,93 @@
+#!/bin/sh
+
+### whatif (patch|minor|major|alpha|rc|beta)
+whatif() {(
+    set -e
+    TMPPREFIX=/tmp/tmp.releaser-whatif
+    T="$(mktemp -d "${TMPPREFIX}.XXXXXXXX")"
+    cleanup() { (set -x;rm -rf "/tmp/${TMPPREFIX#/tmp/}${T#$TMPPREFIX}"); }
+    trap "cleanup;exit 1" SIGINT SIGTERM
+    git clone . "$T" &> /dev/null
+    cargo set-version --manifest-path "$T/Cargo.toml" --bump "$1" &> /dev/null
+    tomlq -r .package.version "$T/Cargo.toml"
+    rm -rf "/tmp/${TMPPREFIX#/tmp/}${T#$TMPPREFIX}"
+    cleanup
+)}
+
+if [ $# -eq 0 ];then
+	echo "crate releaser:"
+	echo
+
+	printf "% 8s : %s\n" name version
+	printf "% 8s : %s\n" -------- --------
+	for f in major minor patch rc beta alpha;do
+		printf "% 8s : %s\n" $f "$(whatif "$f")"
+	done
+
+	echo "
+Call with any of the above arguments to change this crate's version
+to the associated version:
+
+    $0 [major|minor|patch|rc|beta|alpha]
+"
+    exit 0
+fi
+
+BUMP="$1"
+
+if [ x"$(git branch --show-current)" != xdev ];then
+    1>&2 echo this can only be run from the dev branch
+    exit 1
+fi
+
+if [ ! -d .git ] || [ ! -f Cargo.toml ];then
+    1>&2 echo this can only be run from the root of a rust git repo
+    exit 1
+fi
+
+if git status --porcelain | grep -q . ;then
+    git status || true
+    1>&2 echo can only be run on a clean git tree
+    exit 1
+fi
+
+upgrade() {
+    cargo set-version --bump "$BUMP"
+    VERSION="$(tomlq -r .package.version Cargo.toml)"
+    git add Cargo.toml Cargo.lock
+    git commit -m "release $VERSION"
+    git merge main
+    git checkout main
+    git merge dev
+    git tag "$VERSION"
+    git checkout dev
+    cargo set-version --bump alpha
+    NEW_VERSION="$(tomlq -r .package.version Cargo.toml)"
+    git add Cargo.toml Cargo.lock
+    git commit -m "a new version appears: $NEW_VERSION"
+}
+
+(
+    set -e
+    echo "smoke testing the release process first..."
+    TMPPREFIX="/tmp/tmp.releaser-testrun"
+    T="$(mktemp -d "${TMPPREFIX}.XXXXXXXX")"
+    cleanup() { (set -x; rm -rf "/tmp/${TMPPREFIX#/tmp/}${T#$TMPPREFIX}"); }
+    trap "cleanup;exit 1" SIGINT SIGTERM
+    git clone . "$T"
+    cd "$T"
+    kill -INT $$
+    git checkout main
+    git checkout dev
+    upgrade "$BUMP"; echo $?
+    cleanup
+); RC=$?
+if [ $RC -ne 0 ]; then
+    1>&2 echo "smoke test failed.  aborting!"
+    exit 1
+fi
+
+(
+    set -e
+    upgrade
+)