Add swagger install + allow version updates in CI

Support swagger testing and optional runtime updates similar to
the current golangci-lint tool.  This allows developers to update the
version of swagger at runtime if needed.  Otherwise new CI VM images
will pick up the prescribed version at image build-time via
`make install.tools`.

Signed-off-by: Chris Evich <cevich@redhat.com>

Makefile

@@ -849,7 +849,7 @@ install.systemd:
 endif
 
 .PHONY: install.tools
-install.tools: .install.ginkgo .install.golangci-lint ## Install needed tools
+install.tools: .install.ginkgo .install.golangci-lint .install.swagger ## Install needed tools
 	$(MAKE) -C test/tools
 
 .PHONY: .install.goimports
@@ -868,6 +868,14 @@ install.tools: .install.ginkgo .install.golangci-lint ## Install needed tools
 .install.golangci-lint:
 	VERSION=1.46.2 ./hack/install_golangci.sh
 
+.PHONY: .install.swagger
+.install.swagger:
+	env VERSION=0.30.3 \
+		BINDIR=$(BINDIR) \
+		GOOS=$(GOOS) \
+		GOARCH=$(GOARCH) \
+		./hack/install_swagger.sh
+
 .PHONY: .install.md2man
 .install.md2man:
 	if [ ! -x "$(GOMD2MAN)" ]; then \

contrib/cirrus/setup_environment.sh

@@ -363,7 +363,9 @@ case "$TEST_FLAVOR" in
         showrun $ssh podman tag $helper_fqin \
             docker.io/gitlab/gitlab-runner-helper:x86_64-latest-pwsh
         ;;
-    swagger) ;&  # use next item
+    swagger)
+        make .install.swagger
+        ;;
     release) ;;
     *) die_unknown TEST_FLAVOR
 esac

hack/install_golangci.sh

@@ -1,5 +1,8 @@
 #!/usr/bin/env bash
 
+# This script is intended to be a convenience, to be called from the
+# Makefile `.install.golangci-lint` target.  Any other usage is not recommended.
+
 die() { echo "${1:-No error message given} (from $(basename $0))"; exit 1; }
 
 [ -n "$VERSION" ] || die "\$VERSION is empty or undefined"

hack/install_swagger.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+
+# This script is intended to be a convenience, to be called from the
+# Makefile `.install.swagger` target.  Any other usage is not recommended.
+
+BIN="$BINDIR/swagger"
+
+die() { echo "${1:-No error message given} (from $(basename $0))"; exit 1; }
+
+function install() {
+    echo "Installing swagger v$VERSION into $BIN"
+    curl -sS --retry 5 --location -o $BIN \
+        https://github.com/go-swagger/go-swagger/releases/download/v$VERSION/swagger_${GOOS}_${GOARCH}
+    chmod +x $BIN
+    $BIN version
+}
+
+for req_var in VERSION BINDIR GOOS GOARCH; do
+    [[ -n "${!req_var}" ]] || die "\$$req_var is empty or undefined"
+done
+
+if [ ! -x "$BIN" ]; then
+    install
+else
+    $BIN version | grep "$VERSION"
+    if [[ "$?" -eq 0 ]]; then
+        echo "Using existing $BIN"
+    else
+        install
+    fi
+fi