#!/bin/bash

GO=${GO-go}
ARCH=${ARCH:-$("${GO}" env GOARCH)}
OS=${OS:-$("${GO}" env GOOS)}
SUFFIX="-${ARCH}"
GIT_TAG=$DRONE_TAG
TREE_STATE=clean
COMMIT=$DRONE_COMMIT

if [ -d .git ]; then
    if [ -z "$GIT_TAG" ]; then
        GIT_TAG=$(git tag -l --contains HEAD | head -n 1)
    fi
    if [ -n "$(git status --porcelain --untracked-files=no)" ]; then
        DIRTY="-dirty"
        TREE_STATE=dirty
    fi

    COMMIT=$(git log -n3 --pretty=format:"%H %ae" | grep -v ' drone@localhost$' | cut -f1 -d\  | head -1)
    if [ -z "${COMMIT}" ]; then
    COMMIT=$(git rev-parse HEAD || true)
    fi
fi

get-module-version(){
  go list -m -f '{{if .Replace}}{{.Replace.Version}}{{else}}{{.Version}}{{end}}' $1
}

get-module-path(){
  go list -m -f '{{if .Replace}}{{.Replace.Path}}{{else}}{{.Path}}{{end}}' $1
}

PKG_CONTAINERD_K3S=$(get-module-path github.com/containerd/containerd)
VERSION_CONTAINERD=$(get-module-version github.com/containerd/containerd)
if [ -z "$VERSION_CONTAINERD" ]; then
    VERSION_CONTAINERD="v0.0.0"
fi

VERSION_CRICTL=$(get-module-version github.com/kubernetes-sigs/cri-tools)
if [ -z "$VERSION_CRICTL" ]; then
    VERSION_CRICTL="v0.0.0"
fi

VERSION_K8S_K3S=$(get-module-version k8s.io/kubernetes)
VERSION_K8S=${VERSION_K8S_K3S%-k3s*}
if [ -z "$VERSION_K8S" ]; then
    VERSION_K8S="v0.0.0"
fi

VERSION_RUNC=$(get-module-version github.com/opencontainers/runc)
if [ -z "$VERSION_RUNC" ]; then
    VERSION_RUNC="v0.0.0"
fi

VERSION_HCSSHIM=$(get-module-version github.com/Microsoft/hcsshim)
if [ -z "$VERSION_HCSSHIM" ]; then
    VERSION_HCSSHIM="v0.0.0"
fi

VERSION_FLANNEL=$(get-module-version github.com/flannel-io/flannel)
if [ -z "$VERSION_FLANNEL" ]; then
  VERSION_FLANNEL="v0.0.0"
fi

VERSION_CRI_DOCKERD=$(get-module-version github.com/Mirantis/cri-dockerd)
if [ -z "$VERSION_CRI_DOCKERD" ]; then
  VERSION_CRI_DOCKERD="v0.0.0"
fi

VERSION_CNIPLUGINS="v1.6.0-k3s1"
VERSION_FLANNEL_PLUGIN="v1.6.0-flannel1"

VERSION_KUBE_ROUTER=$(get-module-version github.com/cloudnativelabs/kube-router/v2)
if [ -z "$VERSION_KUBE_ROUTER" ]; then
    VERSION_KUBE_ROUTER="v0.0.0"
fi

VERSION_ROOT="v0.14.1"

DEPENDENCIES_URL="https://raw.githubusercontent.com/kubernetes/kubernetes/${VERSION_K8S}/build/dependencies.yaml"
VERSION_GOLANG="go"$(curl -sL "${DEPENDENCIES_URL}" | yq e '.dependencies[] | select(.name == "golang: upstream version").version' -)

if [[ -n "$GIT_TAG" ]]; then
    if [[ ! "$GIT_TAG" =~ ^"$VERSION_K8S"[+-] ]]; then
        echo "Tagged version '$GIT_TAG' does not match expected version '$VERSION_K8S[+-]*'" >&2
        exit 1
    fi
    VERSION=$GIT_TAG
else
    VERSION="$VERSION_K8S+k3s-${COMMIT:0:8}$DIRTY"
fi
VERSION_TAG="$(sed -e 's/+/-/g' <<< "$VERSION")"

BINARY_POSTFIX=
if [ ${OS} = windows ]; then
    BINARY_POSTFIX=.exe
fi