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build: a no-main entry namespace runs as a script instead of crashing

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jolt build -m ns on a namespace with only top-level side effects and no
-main produced a binary that printed its output, then crashed calling a nil
-main ("nil cannot be cast to IFn"). The launcher now calls -main only when
the entry ns actually defines one; otherwise the top-level forms (already run
at heap build) are the whole program and it exits cleanly. Regression case
added to build-smoke.sh.
This commit is contained in:
Yogthos 2026-07-04 10:18:57 -04:00
parent 403c3f302f
commit dbc5afac32
2 changed files with 25 additions and 3 deletions
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18
host/chez/build-smoke.sh
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@ -129,4 +129,20 @@ if [ "$got_dr" != "42" ]; then
echo " FAIL: built #code data reader — want 42, got \`$got_dr\`"; exit 1
fi
echo "build smoke: passed (release + optimized + direct-link + tree-shake + compiler+core shake + data-reader)"
# A script namespace with no -main (just top-level side effects) must build and
# run its top-level forms, then exit cleanly — not crash calling a nil -main.
nomain="$(dirname "$out")/nomain"
mkdir -p "$nomain/src"
printf '{:paths ["src"]}\n' > "$nomain/deps.edn"
printf '(ns script)\n(println "no-main script ran")\n' > "$nomain/src/script.clj"
nmout="$(dirname "$out")/nomain-bin"
if ! JOLT_PWD="$nomain" bin/joltc build -m script -o "$nmout" >/dev/null 2>&1; then
echo " FAIL: jolt build of a no-main script exited non-zero"; exit 1
fi
got_nm="$(cd / && "$nmout" 2>&1)"; rc_nm=$?
if [ "$got_nm" != "no-main script ran" ] || [ "$rc_nm" != "0" ]; then
echo " FAIL: no-main script binary — want 'no-main script ran' rc 0, got \`$got_nm\` rc $rc_nm"
exit 1
fi
echo "build smoke: passed (release + optimized + direct-link + tree-shake + compiler+core shake + data-reader + no-main)"