Use a local Go 1.18 installation to check for minimum version support.

.evergreen/config.yml

@@ -1362,19 +1362,14 @@ tasks:
         vars:
           MONGO_GO_DRIVER_COMPRESSOR: "snappy"
 
-  # Build with the oldest supported version of Go.
-  - name: go1.18-build
+  - name: build-compile-check
     tags: ["compile-check"]
     commands:
       - command: subprocess.exec
         params:
           binary: bash
-          env:
-            GOROOT: /opt/golang/go1.18
-          add_to_path: [/opt/golang/go1.18/bin]
           args: [*task-runner, build-compile-check]
 
-  # Build with the same Go version that we're using for tests.
   - name: build
     tags: ["compile-check"]
     commands:

Taskfile.yml

@@ -18,14 +18,22 @@ tasks:
   check-license: bash etc/check_license.sh
 
   build:
-    deps: [cross-compile, build-tests, build-compile-check, install-libmongocrypt]
+    deps: [install-libmongocrypt]
     cmds:
       - go build ./...
       - go build ${BUILD_TAGS} ./...
+      - task: cross-compile
+      - task: build-tests
 
   build-tests: go test -short ${BUILD_TAGS} -run ^$$ ./...
 
-  build-compile-check: bash etc/compile_check.sh
+  # Build the compilecheck submodule, both with the system version of Go and
+  # with the minimum supported version of Go (Go 1.18).
+  build-compile-check:
+    deps: [install-go118]
+    cmds:
+      - bash etc/compile_check.sh
+      - PATH=$(go1.18 env GOROOT)/bin:$PATH GOROOT=$(go1.18 env GOROOT) bash etc/compile_check.sh
 
   build-aws-ecs-test: go build ${BUILD_TAGS} ./internal/cmd/testaws/main.go
 
@@ -210,3 +218,9 @@ tasks:
     internal: true
     cmds:
       - go install github.com/walle/lll/...@latest
+
+  install-go118:
+    internal: true
+    cmds:
+      - go install golang.org/dl/go1.18@latest
+      - go1.18 download

etc/compile_check.sh

@@ -5,28 +5,15 @@ set -x # show all commands being run
 GC=go
 COMPILE_CHECK_DIR="internal/cmd/compilecheck"
 # shellcheck disable=SC2034
-DEV_MIN_VERSION=1.19
-
-# version will flatten a version string of upto 4 components for inequality
-# comparison.
-function version {
-	echo "$@" | awk -F. '{ printf("%d%03d%03d%03d\n", $1,$2,$3,$4); }';
-}
 
 # compile_check will attempt to build the internal/test/compilecheck project
 # using the provided Go version. This is to simulate an end-to-end use case.
-# This check will only run on environments where the Go version is greater than
-# or equal to the given version.
 function compile_check {
 	# Change the directory to the compilecheck test directory.
-	cd ${COMPILE_CHECK_DIR}
-
-	MACHINE_VERSION=`${GC} version | { read _ _ v _; echo ${v#go}; }`
+	pushd ${COMPILE_CHECK_DIR}
 
-	# If the version is not 1.13, then run "go mod tidy"
-	if [ "$(version $MACHINE_VERSION)" -ge "$(version 1.15)" ]; then
-		go mod tidy
-	fi
+	${GC} version
+	${GC} mod tidy
 
 	# Check simple build.
 	${GC} build ./...
@@ -35,7 +22,7 @@ function compile_check {
 	${GC} build -buildmode=plugin
 
 	# Check build with tags.
-	go build $BUILD_TAGS ./...
+	${GC} build $BUILD_TAGS ./...
 
 	# Check build with various architectures.
 	GOOS=linux GOARCH=386 ${GC} build ./...
@@ -50,7 +37,7 @@ function compile_check {
 	rm compilecheck.so
 
 	# Change the directory back to the working directory.
-	cd -
+	popd
 }
 
 compile_check