add release script

release.sh

@@ -0,0 +1,70 @@
+#!/bin/bash
+
+set -Eeuo pipefail
+
+NAME="wimip"
+GIT_SHA="$(git --no-pager describe --always --dirty)"
+BUILD_TIME="$(date '+%s')"
+LFLAGS="-X main.gitsha=$GIT_SHA -X main.compiled=$BUILD_TIME"
+
+VERSION="${VERSION:-$GIT_SHA}"
+echo "Version: $VERSION"
+
+release() {
+  echo "Building $NAME-$VERSION for $GOOS/$GOARCH (${GOARM:-default})..."
+
+  if [ "$GOOS" == "windows" ]; then
+    EXT=".exe"
+  else
+    EXT=""
+  fi
+
+  if [ "$GOARCH" == "arm" -a -n "${GOARM:-}" ]; then
+    ARM_EXT="-armv$GOARM"
+  else
+    ARM_EXT=""
+  fi
+
+  export GOARCH GOOS
+  if [ -n "${GOARM:-}" ]; then
+    export GOARM
+  fi
+
+  CGO_ENABLED=0 go build -ldflags " -w $LFLAGS" -o "bin/$NAME$EXT" cli/main.go
+  tar -czf "release/$NAME-$GOOS-$GOARCH$ARM_EXT.tar.gz" -C bin/ "$NAME$EXT"
+  (cd release && sha1sum "$NAME-$GOOS-$GOARCH$ARM_EXT.tar.gz" > "$NAME-$GOOS-$GOARCH$ARM_EXT.tar.gz.sha1")
+  rm -f "bin/$NAME$EXT"
+}
+
+rm -rf bin release
+mkdir -p bin release
+
+go generate ./...
+while read configuration; do
+  unset GOOS
+  unset GOARCH
+  unset GOARM
+  eval "$configuration"
+  release
+done <<EOF
+GOOS=linux GOARCH=amd64
+GOOS=linux GOARCH=arm64
+GOOS=linux GOARCH=arm GOARM=5
+GOOS=darwin GOARCH=amd64
+EOF
+
+CURRENT_TAG="$(git describe --tags --exact-match 2>/dev/null || true)"
+CURRENT_COMMIT_ID="$(git rev-parse HEAD)"
+
+if [ -z "$CURRENT_TAG" ]; then
+  echo "Currently not on a tag. Skipping GitHub release creation..."
+  exit 0
+fi
+
+gh auth status
+if ! gh release list | cut -f3 | grep -qx "$VERSION"; then
+  echo "Creating the $VERSION release..."
+  gh release create "$VERSION" release/* -d --target "$CURRENT_COMMIT_ID" -n "Released $VERSION" --title "$VERSION"
+else
+  gh release upload "$VERSION" --clobber release/*
+fi