Add compile restic binary for CVE fix

Signed-off-by: Ming <mqiu@vmware.com>

Dockerfile

@@ -29,8 +29,6 @@ WORKDIR /go/src/github.com/vmware-tanzu/velero
 
 COPY . /go/src/github.com/vmware-tanzu/velero
 
-RUN apt-get update && apt-get install -y bzip2
-
 FROM --platform=$BUILDPLATFORM builder-env as builder
 
 ARG TARGETOS
@@ -45,7 +43,7 @@ ENV GOOS=${TARGETOS} \
     GOARM=${TARGETVARIANT}
 
 RUN mkdir -p /output/usr/bin && \
-    bash ./hack/download-restic.sh && \
+    bash ./hack/build-restic.sh && \
     export GOARM=$( echo "${GOARM}" | cut -c2-) && \
     go build -o /output/${BIN} \
     -ldflags "${LDFLAGS}" ${PKG}/cmd/${BIN}

changelogs/unreleased/5574-qiuming-best

@@ -0,0 +1 @@
+Add compile restic binary for CVE fix 

hack/download-restic.sh → hack/build-restic.sh

@@ -22,6 +22,7 @@ set -o pipefail
 # is the path expected by the Velero Dockerfile.
 output_dir=${OUTPUT_DIR:-/output/usr/bin}
 restic_bin=${output_dir}/restic
+build_path=$(dirname "$PWD")
 
 if [[ -z "${BIN}" ]]; then
     echo "BIN must be set"
@@ -46,8 +47,9 @@ if [[ -z "${RESTIC_VERSION}" ]]; then
     exit 1
 fi
 
-curl -s -L https://github.com/restic/restic/releases/download/v${RESTIC_VERSION}/restic_${RESTIC_VERSION}_${GOOS}_${GOARCH}.bz2 -O
-bunzip2 restic_${RESTIC_VERSION}_${GOOS}_${GOARCH}.bz2
-mv restic_${RESTIC_VERSION}_${GOOS}_${GOARCH} ${restic_bin}
-
+mkdir ${build_path}/restic
+git clone -b v${RESTIC_VERSION} https://github.com/restic/restic.git ${build_path}/restic
+pushd ${build_path}/restic
+go run build.go -o ${restic_bin}
 chmod +x ${restic_bin}
+popd