e2e: add frankenstein test build

This is meant to use the Regal version from whatever is in the current
checkout, together with OPA as defined in Regal's go.mod.

It's an early warning against dependency problems that only become
apparent when we're using all of OPA, not the subset of its
functionality that Regal already uses.

Signed-off-by: Stephan Renatus <stephan@styra.com>

Author: srenatus

.github/workflows/build.yaml

@@ -82,6 +82,17 @@ jobs:
       - run: echo "race detector failed but job is optional"
         if: job.steps.race.status == failure()
 
+  frankenstein:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
+        with:
+          go-version-file: go.mod
+      - run: |
+          go run .
+        working-directory: e2e/testbuild
+
   code_coverage:
     runs-on: ubuntu-latest
     steps:

e2e/testbuild/go.mod

@@ -0,0 +1,131 @@
+module github.com/styrainc/regal/e2e/testbuild
+
+go 1.24.3
+
+require (
+	github.com/open-policy-agent/opa v1.5.1
+	github.com/styrainc/regal v0.34.1
+)
+
+require (
+	dario.cat/mergo v1.0.2 // indirect
+	github.com/Microsoft/go-winio v0.6.2 // indirect
+	github.com/ProtonMail/go-crypto v1.1.6 // indirect
+	github.com/agnivade/levenshtein v1.2.1 // indirect
+	github.com/arl/statsviz v0.6.0 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/bytecodealliance/wasmtime-go/v3 v3.0.2 // indirect
+	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/cloudflare/circl v1.6.1 // indirect
+	github.com/containerd/containerd/v2 v2.1.1 // indirect
+	github.com/containerd/errdefs v1.0.0 // indirect
+	github.com/containerd/log v0.1.0 // indirect
+	github.com/containerd/platforms v1.0.0-rc.1 // indirect
+	github.com/coreos/go-semver v0.3.1 // indirect
+	github.com/cyphar/filepath-securejoin v0.4.1 // indirect
+	github.com/dgraph-io/badger/v4 v4.7.0 // indirect
+	github.com/dgraph-io/ristretto/v2 v2.2.0 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/emirpasic/gods v1.18.1 // indirect
+	github.com/fatih/color v1.18.0 // indirect
+	github.com/felixge/fgprof v0.9.5 // indirect
+	github.com/felixge/httpsnoop v1.0.4 // indirect
+	github.com/fsnotify/fsnotify v1.9.0 // indirect
+	github.com/gdamore/encoding v1.0.0 // indirect
+	github.com/gdamore/tcell v1.1.4 // indirect
+	github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
+	github.com/go-git/go-billy/v5 v5.6.2 // indirect
+	github.com/go-git/go-git/v5 v5.16.0 // indirect
+	github.com/go-ini/ini v1.67.0 // indirect
+	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/go-viper/mapstructure/v2 v2.2.1 // indirect
+	github.com/gobwas/glob v0.2.3 // indirect
+	github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 // indirect
+	github.com/golang/protobuf v1.5.4 // indirect
+	github.com/google/flatbuffers v25.2.10+incompatible // indirect
+	github.com/google/go-dap v0.12.0 // indirect
+	github.com/google/pprof v0.0.0-20250422154841-e1f9c1950416 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/gorilla/mux v1.8.1 // indirect
+	github.com/gorilla/websocket v1.5.0 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.26.1 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/jstemmer/go-junit-report/v2 v2.1.0 // indirect
+	github.com/kevinburke/ssh_config v1.2.0 // indirect
+	github.com/klauspost/compress v1.18.0 // indirect
+	github.com/lucasb-eyer/go-colorful v1.0.3 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-runewidth v0.0.16 // indirect
+	github.com/moby/locker v1.0.1 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/olekukonko/tablewriter v0.0.5 // indirect
+	github.com/opencontainers/go-digest v1.0.0 // indirect
+	github.com/opencontainers/image-spec v1.1.1 // indirect
+	github.com/owenrumney/go-sarif/v2 v2.3.3 // indirect
+	github.com/pdevine/go-asciisprite v0.1.6 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
+	github.com/peterh/liner v1.2.2 // indirect
+	github.com/pjbgf/sha1cd v0.3.2 // indirect
+	github.com/pkg/profile v1.7.0 // indirect
+	github.com/prometheus/client_golang v1.22.0 // indirect
+	github.com/prometheus/client_model v0.6.2 // indirect
+	github.com/prometheus/common v0.63.0 // indirect
+	github.com/prometheus/procfs v0.16.1 // indirect
+	github.com/rcrowley/go-metrics v0.0.0-20250401214520-65e299d6c5c9 // indirect
+	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/sagikazarmark/locafero v0.7.0 // indirect
+	github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 // indirect
+	github.com/sirupsen/logrus v1.9.3 // indirect
+	github.com/skeema/knownhosts v1.3.1 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
+	github.com/sourcegraph/jsonrpc2 v0.2.1 // indirect
+	github.com/spf13/afero v1.12.0 // indirect
+	github.com/spf13/cast v1.7.1 // indirect
+	github.com/spf13/cobra v1.9.1 // indirect
+	github.com/spf13/pflag v1.0.6 // indirect
+	github.com/spf13/viper v1.20.1 // indirect
+	github.com/styrainc/roast v0.10.0 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+	github.com/tchap/go-patricia/v2 v2.3.2 // indirect
+	github.com/vektah/gqlparser/v2 v2.5.26 // indirect
+	github.com/xanzy/ssh-agent v0.3.3 // indirect
+	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
+	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
+	github.com/yashtewari/glob-intersection v0.2.0 // indirect
+	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.60.0 // indirect
+	go.opentelemetry.io/otel v1.35.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.35.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.35.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.35.0 // indirect
+	go.opentelemetry.io/otel/metric v1.35.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.35.0 // indirect
+	go.opentelemetry.io/otel/trace v1.35.0 // indirect
+	go.opentelemetry.io/proto/otlp v1.5.0 // indirect
+	go.uber.org/atomic v1.9.0 // indirect
+	go.uber.org/automaxprocs v1.6.0 // indirect
+	go.uber.org/multierr v1.9.0 // indirect
+	golang.org/x/crypto v0.37.0 // indirect
+	golang.org/x/net v0.39.0 // indirect
+	golang.org/x/sync v0.14.0 // indirect
+	golang.org/x/sys v0.33.0 // indirect
+	golang.org/x/text v0.24.0 // indirect
+	golang.org/x/time v0.11.0 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20250218202821-56aae31c358a // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250218202821-56aae31c358a // indirect
+	google.golang.org/grpc v1.72.0 // indirect
+	google.golang.org/protobuf v1.36.6 // indirect
+	gopkg.in/warnings.v0 v0.1.2 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	oras.land/oras-go/v2 v2.5.0 // indirect
+	sigs.k8s.io/yaml v1.4.0 // indirect
+)
+
+replace github.com/styrainc/regal => ../../