#!/bin/sh
# mesh-check-toolchain: go
#
# The catalogue's own check (novox/hq ADR 0237 as amended): the second layer of a pull request's merge
# check, `mesh/repo-check`, run by the build seat in the mesh's Go toolchain.
#
# The gate — the manifests the change touches through the running controller's module check, every machine
# of the facts snapshot composed with them and validated by the node-engine's own validator, the replays
# against this tree — is the build seat's first layer (`mesh/merge-gate`), run because the mesh's module
# graph builds these modules from here. It is not repeated here. This is the repository's own:
#
#   1. every manifest through the controller's module check, so one module's change cannot leave another
#      it shares a rule with refused (MESH_GATE is the controller the mesh runs);
#   2. the Go tests of every module the change touches that has them, under the race detector when the
#      toolchain has a C compiler — and a module whose dependencies cannot be fetched here, or that is
#      written in TypeScript, is said as not tested, never passed silently.
set -eu

if [ -n "${MESH_GATE:-}" ]; then
	"$MESH_GATE" module check modules/*/module.json > /dev/null
else
	echo "NOT CHECKED: no controller was built beside this check, so the manifests were not read by one"
fi

race=""
if command -v gcc >/dev/null 2>&1; then race="-race"; else echo "NOT RACE-CHECKED: the toolchain holds no C compiler"; fi

# The modules the change reaches are the controller's planner's answer (MESH_CHECK_MODULES, hq ADR 0238):
# a module by its name, a new one by its directory. By hand, without it, the directories the changed files
# are in.
if [ -n "${MESH_CHECK_MODULES:-}" ]; then
	touched=$(printf '%s\n' "$MESH_CHECK_MODULES" | tr ',' '\n' | sed -e 's#^modules/##' -e '/\//d' | sort -u)
else
	touched=$(printf '%s\n' "${MESH_CHECK_CHANGED:-}" | tr ',' '\n' | sed -n 's#^modules/\([^/]*\)/.*#\1#p' | sort -u)
fi
for m in $touched; do
	[ -d "modules/$m" ] || continue
	if [ ! -f "modules/$m/go.mod" ]; then
		[ -f "modules/$m/package.json" ] && echo "NOT TESTED HERE: modules/$m is TypeScript; the gate judges its manifest"
		continue
	fi
	if ! (cd "modules/$m" && GOPRIVATE=git.novox.be go mod download >/dev/null 2>&1); then
		echo "NOT TESTED: modules/$m — its dependencies cannot be fetched by the build seat"
		continue
	fi
	echo "testing modules/$m"
	unformatted=$(cd "modules/$m" && gofmt -l .)
	if [ -n "$unformatted" ]; then
		echo "modules/$m is not gofmt'd: $unformatted"
		exit 1
	fi
	cgo=0
	[ -n "$race" ] && cgo=1
	(cd "modules/$m" && CGO_ENABLED=$cgo GOPRIVATE=git.novox.be go vet ./... &&
		CGO_ENABLED=$cgo GOPRIVATE=git.novox.be go test $race -count=1 ./...)
done