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# Go coverage — Makefile fragment + setup recommendation
#
# This file is owned by the project, not the rulesets bundle. The bundle never
# edits your Makefile. Copy the two targets below into your own Makefile (and
# adjust the variables at the top), then delete this file or keep it as a note.
#
# What you get:
# make coverage runs the suite with a coverage profile and prints
# `go tool cover -func`'s own per-function table
# make coverage-summary prints a file-weighted project number and every
# source file on disk absent from the profile, at 0%.
#
# Why the summary matters: it weights by file and counts a file absent from the
# profile as 0%, so an untested file stays visible instead of being averaged
# away. Note that modern `go test ./...` already lists every module package in
# the profile (at 0% when untested), so for in-module code the missing-file list
# is usually empty; it earns its keep on files outside the test compilation
# (build-tagged files, a dir not covered by ./...). The summary does not
# reimplement the per-function table — `go tool cover -func` already prints it.
#
# ---------------------------------------------------------------------------
# Prerequisite: none beyond the Go toolchain. `go test -coverprofile` and
# `go tool cover` ship with Go; the summary script is pure standard library.
# ---------------------------------------------------------------------------
# Variables — adjust to your layout.
GO ?= go
SOURCE_DIR ?= .
COVERAGE_FILE ?= cover.out
# The summary script ships with the bundle under .claude/scripts/ (gitignored).
COVERAGE_SUMMARY ?= .claude/scripts/coverage-summary.go
coverage:
@$(GO) test ./... -coverprofile=$(COVERAGE_FILE)
@$(GO) tool cover -func=$(COVERAGE_FILE)
@$(MAKE) coverage-summary
coverage-summary:
@if [ ! -f $(COVERAGE_FILE) ]; then \
echo "[!] No coverage file at $(COVERAGE_FILE). Run 'make coverage' first."; \
exit 1; \
fi
@$(GO) run $(COVERAGE_SUMMARY) $(COVERAGE_FILE) $(SOURCE_DIR) .
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