jschoubben
6c6495f6d9
novox/hq ADR 0142, which decided this and was not implemented: "It is unpacked into a directory named for its version, so it can read its own version from its path. The stamp goes, and with it the need for a build to know what it will be called." The mesh's toolchain stamps no version, on purpose, so a delivered host called itself "development build" and the mesh could not tell which host any machine ran — which is the whole of what 087 added. A delivered host lives at <libexec>/versions/<version>/<binary>, and that directory is the answer. A host placed by hand keeps its stamp, which is the honest answer for one the mesh did not deliver, and is every machine until a delivery reaches it. A binary sitting anywhere else is not read as a version at all. The decision is split from the reading so a test can ask about a path without being that binary.
49 lines
1.7 KiB
Go
49 lines
1.7 KiB
Go
package main
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import (
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"os"
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"path/filepath"
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"testing"
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)
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// A component's version comes from where it sits, not from its linker (novox/hq ADR 0142). The mesh's
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// toolchain stamps no version — a build does not know what it will be called — so a delivered host
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// read as "development build" and the mesh could not tell which host a machine ran (04-ISSUES/161).
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func TestADeliveredHostReadsItsVersionFromItsPath(t *testing.T) {
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// A delivered host lives at <libexec>/versions/<version>/<binary>.
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dir := t.TempDir()
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versioned := filepath.Join(dir, "versions", "637f65559d16")
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if err := os.MkdirAll(versioned, 0o755); err != nil {
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t.Fatal(err)
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}
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self := filepath.Join(versioned, "nox-mesh-host")
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if err := os.WriteFile(self, []byte("#!/bin/sh\n"), 0o755); err != nil {
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t.Fatal(err)
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}
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if got := versionAt(self, "development build"); got != "637f65559d16" {
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t.Fatalf("a delivered host read its version as %q", got)
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}
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}
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func TestAHostPlacedByHandKeepsItsStamp(t *testing.T) {
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// The honest answer for one the mesh did not deliver — and every machine is in that state until
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// a delivery reaches it.
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if got := versionAt("/usr/bin/nox-mesh-host", "04a27ca"); got != "04a27ca" {
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t.Fatalf("a hand-placed host read its version as %q", got)
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}
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}
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func TestADirectoryThatIsNotAVersionIsNotReadAsOne(t *testing.T) {
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// A binary sitting anywhere else must not have its parent directory's name read as a version.
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for _, path := range []string{
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"/opt/somewhere/nox-mesh-host",
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"/usr/lib/nox-mesh-host/launch",
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"/home/someone/build/nox-mesh-host",
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} {
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if got := versionAt(path, "the stamp"); got != "the stamp" {
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t.Fatalf("%s read its version as %q", path, got)
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}
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}
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}
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