feat: custom go-builder-fast with prebuilt stdlib for plugin mode

go-builder/Dockerfile

@@ -0,0 +1,18 @@
+ARG GO_VERSION=1.25
+FROM ghcr.io/fission/builder AS fission-builder
+FROM golang:${GO_VERSION}
+
+ENV GOPATH=/usr
+ENV GO111MODULE=on
+ENV GOTOOLCHAIN=local
+
+WORKDIR ${GOPATH}
+
+COPY --from=fission-builder /builder /builder
+
+# Prebuild stdlib для -buildmode=plugin → бьём кэш в образе
+# После этого go build -buildmode=plugin НЕ БУДЕТ перекомпилировать stdlib
+RUN go install -buildmode=plugin std
+
+ADD build.sh /usr/local/bin/build
+RUN chmod +x /usr/local/bin/build

go-builder/build.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+set -eux
+
+srcDir=${GOPATH}/src/$(basename ${SRC_PKG})
+trap "rm -rf ${srcDir}" EXIT
+
+version_ge() { test "$(echo "$@" | tr " " "\n" | sort -rV | head -n 1)" == "$1"; }
+
+if [ -d ${SRC_PKG} ]; then
+    echo "Building in directory ${srcDir}"
+    ln -sf ${SRC_PKG} ${srcDir}
+elif [ -f ${SRC_PKG} ]; then
+    echo "Building file ${SRC_PKG} in ${srcDir}"
+    mkdir -p ${srcDir}
+    cp ${SRC_PKG} ${srcDir}/function.go
+fi
+
+cd ${srcDir}
+
+if [ -f "go.mod" ]; then
+    go mod download
+else
+    export GO111MODULE="on"
+    go mod init
+    go mod tidy
+fi
+
+GOFLAGS="-buildmode=plugin"
+
+if [ -d "vendor" ] && version_ge ${GOLANG_VERSION} "1.12"; then
+    GOFLAGS="${GOFLAGS} -mod=vendor"
+fi
+
+go build ${GOFLAGS} -o ${DEPLOY_PKG} .