Test container with BTest instead of container-structure-tests

This patch replaces the container-strucuture-tests for the Zeek
container with a BTest-driven approach to provide a more familiar
experience. In addtion to `python3` for `btest` we also rely on `make`
being available in Github-hosted runners which at least currently seems
to be hold (probably pulled in as a dependency of CMake which is
officially included, see
https://github.com/actions/virtual-environments/blob/main/images/linux/Ubuntu2004-README.md).

.github/workflows/docker.yml

@@ -36,12 +36,8 @@ jobs:
           load: true
           tags: ${{ env.TEST_TAG }}
 
-      # Run tests on the just created image.
-      - name: Run tests
-        uses: plexsystems/container-structure-test-action@v0.2.0
-        with:
-            image: ${{ env.TEST_TAG }}
-            config: docker/container-structure-test.yaml
+      - name: Run btests
+        run: make -C docker/btest
 
       - name: Get Version
         id: version
@@ -84,3 +80,11 @@ jobs:
           push: true
           tags: |
             zeekurity/${{ steps.target.outputs.tag}}
+
+      - name: Preserve artifacts
+        uses: actions/upload-artifact@v2
+        if: failure()
+        with:
+          name: docker-btest
+          path: docker/btest/.tmp
+          if-no-files-found: ignore

docker/Makefile

@@ -6,3 +6,7 @@ VERSION := $$(cat ../VERSION)
 
 all:
 	@docker build -t zeek:$(VERSION) -f Dockerfile ..
+	@docker tag zeek:$(VERSION) zeek:latest
+
+test:
+	@TEST_TAG=zeek:$(VERSION) $(MAKE) -C btest

docker/btest/.gitignore

@@ -0,0 +1,3 @@
+.tmp
+.btest.failed.dat
+diag.log

docker/btest/Baseline/docker.structure_tests/output

@@ -0,0 +1,20 @@
+### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
+zeek version xxx
+XXX
+[sources]
+zeek = https://github.com/zeek/packages
+
+[paths]
+state_dir = /usr/local/zeek/var/lib/zkg
+script_dir = /usr/local/zeek/share/zeek/site
+plugin_dir = /usr/local/zeek/lib/zeek/plugins
+bin_dir = /usr/local/zeek/bin
+zeek_dist = 
+
+[templates]
+default = https://github.com/zeek/package-template
+
+
+Installing "zeek/sethhall/domain-tld"
+Installed "zeek/sethhall/domain-tld" (XXX)
+Loaded "zeek/sethhall/domain-tld"

docker/btest/Makefile

@@ -0,0 +1,11 @@
+DIAG=diag.log
+BTEST=../../auxil/btest/btest
+
+all: cleanup btest-verbose
+
+# Showing all tests.
+btest-verbose:
+	@$(BTEST) -d -j -f $(DIAG)
+
+cleanup:
+	@rm -f $(DIAG)

docker/btest/btest.cfg

@@ -0,0 +1,13 @@
+[btest]
+TestDirs    = docker
+TmpDir      = %(testbase)s/.tmp
+BaselineDir = %(testbase)s/Baseline
+IgnoreDirs  = .tmp
+IgnoreFiles = *.tmp *.swp #* *.trace .DS_Store
+MinVersion  = 0.63
+
+[environment]
+LC_ALL=C
+PATH=%(testbase)s/../../auxil/btest:%(default_path)s
+TEST_IMAGE=${TEST_TAG:-zeek:latest}
+TZ=UTC

docker/btest/docker/structure_tests.sh

@@ -0,0 +1,20 @@
+# @TEST-REQUIRES: docker inspect ${TEST_TAG:-zeek:latest}
+# @TEST-EXEC: bash -euxo pipefail %INPUT >output
+# @TEST-EXEC: btest-diff output
+
+TEST_TAG=${TEST_TAG:-zeek:latest}
+
+# Check that `zeek` can be run.
+docker run --rm "${TEST_TAG}" zeek -v | sed 's/\(zeek version\) .*/\1 xxx/'
+
+# Check that this is a release build.
+docker run --rm "${TEST_TAG}" zeek-config --build_type | grep -q 'release'
+
+# Check that `btest` can be run.
+docker run --rm "${TEST_TAG}" btest --version | sed 's/^[0-9].*/XXX/g'
+
+# Check that the zkg config looks valid.
+docker run --rm "${TEST_TAG}" zkg config
+
+# Check that a plugin can be installed. We pick any plugin with minimal deps here.
+docker run --rm "${TEST_TAG}" zkg install --force sethhall/domain-tld | sed 's/(.*)/(XXX)/'

docker/container-structure-test.yaml

@@ -1,37 +0,0 @@
-# See the file "COPYING" in the main distribution directory for copyright.
-
-# This file contains a test configuration for
-# https://github.com/GoogleContainerTools/container-structure-test.
-
-schemaVersion: 2.0.0
-
-commandTests:
-  - name: zeek can be run
-    command: zeek
-    args: ["-v"]
-    expectedOutput: ["^zeek version .*"]
-
-  - name: is release build
-    command: zeek-config
-    args: ["--build_type"]
-    expectedOutput: ["release"]
-
-  - name: btest can be run
-    command: btest
-    args: ["--version"]
-    expectedOutput: ["\\d\\.\\d"]
-
-  - name: valid zkg config
-    command: zkg
-    args: ["config"]
-    # Just validate that we some some valid entry here.
-    expectedOutput: ["state_dir = /usr/local/zeek/var/lib/zkg"]
-
-  - name: plugin can be installed
-    command: zkg
-    # We pick any plugin with minimal deps here.
-    args: ["install", "--force", "sethhall/domain-tld"]
-    expectedOutput:
-      - "Installing \"zeek/sethhall/domain-tld\""
-      - "Installed \"zeek/sethhall/domain-tld\" (.*)"
-      - "Loaded \"zeek/sethhall/domain-tld\""