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A TypeScript bundle carries what it runs with: the toolchain's runtime directory is copied into it (hq to-be 38 WP3, ADR 0188)

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A bundle that compiled was not yet a bundle that ran. The compiler resolved `import "nats"` from
the toolchain image's own node_modules and the pack took only what the compiler wrote, so what a
machine unpacked could not find a single dependency — and Node would have read the bare `.js` as
CommonJS besides. No TypeScript bundle had run live to show it; the runtime's own is the first that
must. A toolchain now names a Dependencies directory in its image, copied whole into the output's
root after the compile by a second run in the same image: for TypeScript /app/runtime, which the
runtime's image puts a `"type": "module"` package.json and its pruned node_modules at. An older
image without it fails the build by name rather than packing a bundle that starts nowhere. The
SDK's and the runtime's dependencies, nothing module-specific yet: a skeleton, by ADR 0188 §5.
This commit is contained in:
jochen
2026-10-02 21:44:44 +02:00
parent 08bb56f1d3
commit ca7e81e964
3 changed files with 81 additions and 4 deletions
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internal/builder/builder.go
+20
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@@ -968,6 +968,26 @@ func compile(ctx context.Context, run Runner, tree string, chain Toolchain,
if _, err := run(ctx, tree, "docker", invocation...); err != nil {
return "", err
}
if chain.Dependencies != "" {
// **What the bundle runs with, from the image it was compiled in** (Toolchain.Dependencies).
// A second run in the same image rather than a shell wrapped around the compiler: the
// compile line stays a plain command a reader can run by hand, and the copy is one more
// plain command beside it. Refused by name when the image carries no such directory — an
// older toolchain image — because a bundle packed without its dependencies starts nowhere
// and says so three layers away from here.
copying := []string{
"run", "--rm",
"--volume", tree + ":" + within,
"--workdir", within,
base,
"sh", "-c",
`test -d "$1" || { echo "the toolchain image carries no $1: it predates the mesh shipping a bundle's dependencies, rebuild $2 first" >&2; exit 1; }; cp -a "$1/." "$3/"`,
"dependencies", chain.Dependencies, chain.Base, out,
}
if _, err := run(ctx, tree, "docker", copying...); err != nil {
return "", fmt.Errorf("copying the %s dependencies a bundle runs with: %w", chain.Language, err)
}
}
return filepath.Join(tree, out), nil
}