volume-manager: the id-path deriver + volumes.csv override (S2)

NEW volume-map.zig: idString(identity) renders a volume's content identity into its stable mount id-string — gpt-<32hex>, fat-<8hex>, mbr-<sig>-<index> — the token whose default mount path is /volumes/<id>, so the path IS the id and never a port or a label; two volumes that share a label get distinct ids automatically. parse() reads volumes.csv (id, mount_prefix) into OPTIONAL overrides; overrideFor returns a pinned prefix or null (the volume takes its default /volumes/<id>). id_maximum is a declared bound; the fixture sizes are named. Three host tests (each rung's id token; override hit/miss; malformed rows counted), wired into the VM package test step with csv. Not yet consumed by the binary — that lands when the VM loads the tables and composes paths (step 4).
2026-08-09 23:55:08 +01:00
parent 3fb8a9b96f
commit 5bfdb75e12
2 changed files with 148 additions and 0 deletions
@@ -40,4 +40,15 @@ pub fn build(b: *std.Build) void {
        }),
    });
    test_step.dependOn(&b.addRunArtifact(filesystem_map_tests).step);
+
+    // volume-map imports csv (and, by path, partition.zig) for the id-path
+    // deriver and the volumes.csv override parser.
+    const volume_map_tests = b.addTest(.{
+        .root_module = b.createModule(.{
+            .root_source_file = b.path("volume-map.zig"),
+            .target = b.resolveTargetQuery(.{}),
+            .imports = &.{.{ .name = "csv", .module = csv.module("csv") }},
+        }),
+    });
+    test_step.dependOn(&b.addRunArtifact(volume_map_tests).step);
 }