Cirrus: Add modern get_ci_vm support

Previously `ci/get_vm.sh` was duplicated from other containers-org
repos.  This became difficult to maintain, so a shared implementation
was developed in a container image.  Using it from a special
`hack/get_ci_vm.sh` requires some changes to `.cirrus.yml` to work
properly.

Signed-off-by: Chris Evich <[email protected]>

Author: cevich

.cirrus.yml

@@ -3,9 +3,8 @@
 env:
     DEST_BRANCH: "master"
     GOPATH: "/var/tmp/go"
-    CIRRUS_WORKING_DIR: "${GOPATH}/src/github.com/containers/oci-seccomp-bpf-hook"
+    CIRRUS_WORKING_DIR: "${GOPATH}/src/github.com/containers/dnsname"
     GOSRC: "$CIRRUS_WORKING_DIR"
-    SCRIPT_BASE: "./contrib/cirrus"
     CIRRUS_SHELL: "/bin/bash"
     IMAGE_PROJECT: "libpod-218412"
     HOME: "/root"  # not set by default
@@ -64,10 +63,8 @@ meta_task:
 
 validate_task:
 
-    env:
-        PATH: "$PATH:/var/tmp/go/bin"
-
     validate_script:
+      - export PATH="$PATH:$GOPATH/bin"
       - make validate
       - make vendor
       - ./hack/tree_status.sh
@@ -88,9 +85,7 @@ test_task:
           gce_instance:
             image_name: ${UBUNTU_CACHE_IMAGE_NAME}
 
-    env:
-        PATH: "$PATH:/var/tmp/go/bin"
-
     test_script:
+        - export PATH="$PATH:$GOPATH/bin"
         - make
         - make test

ci/get_vm.sh

@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+
+#
+# For help and usage information, simply execute the script w/o any arguments.
+#
+# This script is intended to be run by Red Hat dnsname developers who need
+# to debug problems specifically related to Cirrus-CI automated testing.
+# It requires that you have been granted prior access to create VMs in
+# google-cloud.  For non-Red Hat contributors, VMs are available as-needed,
+# with supervision upon request.
+
+set -e
+
+SCRIPT_FILEPATH=$(realpath "${BASH_SOURCE[0]}")
+SCRIPT_DIRPATH=$(dirname "$SCRIPT_FILEPATH")
+REPO_DIRPATH=$(realpath "$SCRIPT_DIRPATH/../")
+
+# Help detect if we were called by get_ci_vm container
+GET_CI_VM="${GET_CI_VM:-0}"
+in_get_ci_vm() {
+    if ((GET_CI_VM==0)); then
+        echo "Error: $1 is not intended for use in this context"
+        exit 2
+    fi
+}
+
+# get_ci_vm APIv1 container entrypoint calls into this script
+# to obtain required repo. specific configuration options.
+if [[ "$1" == "--config" ]]; then
+    in_get_ci_vm "$1"
+    cat <<EOF
+DESTDIR="/var/tmp/go/src/github.com/containers/dnsname"
+UPSTREAM_REPO="https://github.com/containers/dnsname.git"
+CI_ENVFILE="/etc/ci_environment"
+GCLOUD_PROJECT="dnsname-8675309"
+GCLOUD_IMGPROJECT="libpod-218412"
+GCLOUD_CFG="dnsname"
+GCLOUD_ZONE="${GCLOUD_ZONE:-us-central1-c}"
+GCLOUD_CPUS="2"
+GCLOUD_MEMORY="4Gb"
+GCLOUD_DISK="200"
+EOF
+elif [[ "$1" == "--setup" ]]; then
+    in_get_ci_vm "$1"
+    # get_ci_vm container entrypoint calls us with this option on the
+    # Cirrus-CI environment instance, to perform repo.-specific setup.
+    echo "+ Setting up environment" > /dev/stderr
+    echo 'PATH=$PATH:$GOPATH/bin' > /etc/ci_environment
+else
+    # Create and access VM for specified Cirrus-CI task
+    mkdir -p $HOME/.config/gcloud/ssh
+    podman run -it --rm \
+        --tz=local \
+        -e NAME="$USER" \
+        -e SRCDIR=/src \
+        -e GCLOUD_ZONE="$GCLOUD_ZONE" \
+        -e DEBUG="${DEBUG:-0}" \
+        -v $REPO_DIRPATH:/src:O \
+        -v $HOME/.config/gcloud:/root/.config/gcloud:z \
+        -v $HOME/.config/gcloud/ssh:/root/.ssh:z \
+        quay.io/libpod/get_ci_vm:latest "$@"
+fi