test: add make coverage-summary with untested-module detection

A module no test loads never appears in undercover's report, so a line-weighted total silently skips it. The coverage-summary target counts such a file as 0% and weights the project number by file, so untested modules stay visible.

I replaced scripts/coverage-summary.py, which only summarized files already in the report. make coverage now chains the summary, and CI prints it in the coverage step instead of a separate python call.

The helper runs on stock Emacs (built-in json and seq), so it needs no dev deps. It lives in tracked scripts/ so CI can reach it.

1 files changed, 0 insertions, 56 deletions

diff --git a/scripts/coverage-summary.py b/scripts/coverage-summary.py
deleted file mode 100755
index 9b7bc99..0000000
--- a/scripts/coverage-summary.py
+++ /dev/null
@@ -1,56 +0,0 @@
-#!/usr/bin/env python3
-"""Print a per-file and overall coverage summary from undercover's simplecov JSON.
-
-Usage:
-    python3 scripts/coverage-summary.py [path]
-
-If `path` is omitted, defaults to `.coverage/simplecov.json`.
-Exit code is 0 on success, 1 if the JSON is missing or malformed.
-"""
-
-import json
-import os
-import sys
-
-
-def main(path: str) -> int:
-    try:
-        with open(path) as f:
-            data = json.load(f)
-    except FileNotFoundError:
-        print(f"error: {path} not found; run `make coverage` first", file=sys.stderr)
-        return 1
-    except json.JSONDecodeError as exc:
-        print(f"error: {path} is not valid JSON: {exc}", file=sys.stderr)
-        return 1
-
-    try:
-        suite = data["undercover.el"]["coverage"]
-    except (KeyError, TypeError):
-        print(f"error: {path} does not look like an undercover simplecov report",
-              file=sys.stderr)
-        return 1
-
-    print(f'{"File":<30} {"Lines":>7} {"Covered":>8} {"Coverage":>10}')
-    print("-" * 60)
-
-    total_lines = 0
-    total_covered = 0
-    for fname, lines in suite.items():
-        relevant = [l for l in lines if l is not None]
-        covered = sum(1 for l in relevant if l > 0)
-        pct = 100.0 * covered / len(relevant) if relevant else 0.0
-        total_lines += len(relevant)
-        total_covered += covered
-        short = os.path.basename(fname)
-        print(f"{short:<30} {len(relevant):>7} {covered:>8} {pct:>9.2f}%")
-
-    print("-" * 60)
-    overall = 100.0 * total_covered / total_lines if total_lines else 0.0
-    print(f'{"TOTAL":<30} {total_lines:>7} {total_covered:>8} {overall:>9.2f}%')
-    return 0
-
-
-if __name__ == "__main__":
-    target = sys.argv[1] if len(sys.argv) > 1 else ".coverage/simplecov.json"
-    sys.exit(main(target))