#!/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) — and the count of
#      long-running resources without `health` held to the number in health-undeclared, which only goes down;
#   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;
#   3. the words (novox/hq ADR 0244): no word the glossary retired for the tools, as copied in
#      retired-words, in any text a module's tools can show an agent — every string in its own code that is
#      not a test, and every description in its manifest. Run over every module, not only the touched ones,
#      so a word newly retired is found everywhere it stands.
set -eu

(cd checks/words && go run . ../..)

if [ -n "${MESH_GATE:-}" ]; then
	checked=$("$MESH_GATE" module check modules/*/module.json) || { printf '%s\n' "$checked"; exit 1; }
	# **The count only goes down** (novox/hq ADR 0240 rule 8): the long-running resources that do not say how
	# they are ready, as the controller counts them, against the number kept in health-undeclared. A change
	# that raises it fails; one that lowers it writes the new number there, so it can never rise again.
	kept=$(sed -n 's/^\([0-9][0-9]*\).*/\1/p' health-undeclared | head -n 1)
	counted=$(printf '%s\n' "$checked" | sed -n 's/^long-running resources without health: \([0-9][0-9]*\)$/\1/p')
	if [ -z "$counted" ]; then
		echo "NOT COUNTED: the controller the mesh runs is older than the count of resources without health (ADR 0240 Phase B)"
	elif [ "$counted" -gt "$kept" ]; then
		echo "the long-running resources without health rose from $kept to $counted: declare how each new one is ready (ADR 0240 rule 8)"
		exit 1
	elif [ "$counted" -lt "$kept" ]; then
		echo "the long-running resources without health fell from $kept to $counted: write $counted in health-undeclared, so the count cannot rise again"
		exit 1
	else
		echo "long-running resources without health: $counted, as kept"
	fi
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