ww/test/wcc/989_m1mangle_run.c

/*
 * 989_m1mangle_run — M1 (#22 + #32): path-qualified symbol mangling and
 * root-unit entry detection. Table-driven, both stages (rule-10: cstage
 * `ww` and wwstage `ww_ww` must AGREE and hit want_exit).
 *
 * Each row lays out a tiny package tree next to a root `main.ww` and
 * builds+runs the root. Because a directory import path-mangles its
 * symbols (`aa.bb.val` etc.), a broken hint or skip rule shows up as a
 * link failure (-1) or wrong runtime value — observable end-to-end.
 *
 *   row              | proves
 *   -----------------+--------------------------------------------------
 *   nested_call      | DIRECTORY import path-mangles + the qualified-ref
 *                    |   hint resolves to the PATH (aa.bb.val), not the
 *                    |   leaf alias — cross-boundary call returns 42
 *   imported_main    | #32/#31: an imported pkg's `fn main` mangles
 *                    |   (aa.bb.main) instead of colliding with the bare
 *                    |   root entry; both link, root main runs → 7
 *   priv_global      | a module-PRIVATE value global mangles on the path
 *                    |   (aa.bb.pv) and the owning module resolves it → 9
 *   single_level     | control: a single-level package's symbols are
 *                    |   UNCHANGED (cc.v stays cc.v) — still resolves → 5
 *   deep_nest        | 2-level nest aa.bb.cc → aa.bb.cc.val path-mangle → 3
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/wait.h>

static int
runwait(const char *cmd)
{
	int rc = system(cmd);
	if (rc == -1) return -1;
	if (WIFEXITED(rc)) return WEXITSTATUS(rc);
	return -1;
}

struct file { const char *path; const char *content; };

struct row {
	const char *label;
	struct file files[4];	/* {NULL,NULL}-terminated package files */
	const char *root;	/* root main.ww content */
	int want_exit;
};

static const struct row rows[] = {
	{ "nested_call",
	  { { "aa/bb/bb.ww",
	      "package bb;\n"
	      "export fn val() int = { return 42; };\n" },
	    { NULL, NULL } },
	  "package main;\n"
	  "import aa.bb;\n"
	  "export fn main() int = { return bb.val(); };\n",
	  42 },

	{ "imported_main",
	  { { "aa/bb/bb.ww",
	      "package bb;\n"
	      "fn main() int = { return 7; };\n"
	      "export fn run() int = { return main(); };\n" },
	    { NULL, NULL } },
	  "package main;\n"
	  "import aa.bb;\n"
	  "export fn main() int = { return bb.run(); };\n",
	  7 },

	{ "priv_global",
	  { { "aa/bb/bb.ww",
	      "package bb;\n"
	      "let pv: int = 9;\n"
	      "export fn getpv() int = { return pv; };\n" },
	    { NULL, NULL } },
	  "package main;\n"
	  "import aa.bb;\n"
	  "export fn main() int = { return bb.getpv(); };\n",
	  9 },

	{ "single_level",
	  { { "cc/cc.ww",
	      "package cc;\n"
	      "export fn v() int = { return 5; };\n" },
	    { NULL, NULL } },
	  "package main;\n"
	  "import cc;\n"
	  "export fn main() int = { return cc.v(); };\n",
	  5 },

	{ "deep_nest",
	  { { "aa/bb/cc/cc.ww",
	      "package cc;\n"
	      "export fn val() int = { return 3; };\n" },
	    { NULL, NULL } },
	  "package main;\n"
	  "import aa.bb.cc;\n"
	  "export fn main() int = { return cc.val(); };\n",
	  3 },
};

/* write_file — create `dir/rel` (mkdir -p its parents) with `content`. */
static int
write_file(const char *dir, const char *rel, const char *content)
{
	char path[512], cmd[1024];
	snprintf(path, sizeof path, "%s/%s", dir, rel);
	/* mkdir -p the parent of `path` */
	char parent[512];
	snprintf(parent, sizeof parent, "%s", path);
	char *slash = strrchr(parent, '/');
	if (slash) {
		*slash = '\0';
		snprintf(cmd, sizeof cmd, "mkdir -p '%s'", parent);
		if (runwait(cmd) != 0) return -1;
	}
	FILE *f = fopen(path, "wb");
	if (!f) return -1;
	fputs(content, f);
	fclose(f);
	return 0;
}

/* run_build — lay out the row's package tree + root under a temp dir,
 * build+run the root via `driver`; return the binary's exit code, or -1
 * on a build failure. */
static int
run_build(const char *driver, const struct row *r, int i)
{
	char dir[64], cmd[2048];
	snprintf(dir, sizeof dir, "/tmp/m1mangle_%d_%d", getpid(), i);
	snprintf(cmd, sizeof cmd, "rm -rf '%s' && mkdir -p '%s'", dir, dir);
	if (runwait(cmd) != 0) return -2;

	for (int k = 0; r->files[k].path; k++)
		if (write_file(dir, r->files[k].path, r->files[k].content) != 0)
			return -2;
	if (write_file(dir, "main.ww", r->root) != 0) return -2;

	/* cd into the build dir so the source-dir-first search path finds the
	 * sibling package tree (mirrors Hare's CWD == module-dir). */
	snprintf(cmd, sizeof cmd, "cd '%s' && %s build main.ww 2>/dev/null",
	    dir, driver);
	int brc = runwait(cmd);

	int got = -1;
	if (brc == 0) {
		char outbin[128];
		snprintf(outbin, sizeof outbin, "%s/main", dir);
		got = runwait(outbin);
	}

	snprintf(cmd, sizeof cmd, "rm -rf '%s'", dir);
	runwait(cmd);
	return brc == 0 ? got : -1;
}

int
main(void)
{
	const char *bin = getenv("BIN");
	if (!bin) bin = "out/bin";
	char absbin[1024];
	if (bin[0] != '/') {
		char cwd[1024];
		if (getcwd(cwd, sizeof cwd) == NULL) return 1;
		snprintf(absbin, sizeof absbin, "%s/%s", cwd, bin);
		bin = absbin;
	}

	char cdrv[1024], wdrv[1024];
	snprintf(cdrv, sizeof cdrv, "%s/ww", bin);
	snprintf(wdrv, sizeof wdrv, "%s/ww_ww", bin);

	struct { const char *name; const char *drv; int gated; }
	drivers[] = {
		{ "cstage",  cdrv, 0 },
		{ "wwstage", wdrv, 1 },
		{ NULL, NULL, 0 },
	};

	int n = (int)(sizeof rows / sizeof rows[0]);
	int total = 0, fail = 0;

	for (int d = 0; drivers[d].name; d++) {
		if (drivers[d].gated && access(drivers[d].drv, X_OK) != 0) {
			fprintf(stderr, "m1mangle_run: skip %s (no %s)\n",
			    drivers[d].name, drivers[d].drv);
			continue;
		}
		for (int i = 0; i < n; i++) {
			total++;
			int got = run_build(drivers[d].drv, &rows[i], i);
			if (got != rows[i].want_exit) {
				fprintf(stderr, "m1mangle_run[%s][%s]: exit=%d "
				    "want=%d\n", drivers[d].name, rows[i].label,
				    got, rows[i].want_exit);
				fail++;
			}
		}
	}

	if (fail) {
		fprintf(stderr, "m1mangle_run: %d/%d fixtures failed\n",
		    fail, total);
		return 1;
	}
	printf("m1mangle_run: %d/%d ok\n", total, total);
	return 0;
}