Move files into src/ and build into build/

1 files changed, 0 insertions, 726 deletions

diff --git a/tomo.c b/tomo.c
deleted file mode 100644
index e99f42d9..00000000
--- a/tomo.c
+++ /dev/null
@@ -1,726 +0,0 @@
-// The main program that runs compilation
-#include <ctype.h>
-#include <errno.h>
-#include <gc.h>
-#include <gc/cord.h>
-#include <libgen.h>
-#include <printf.h>
-#include <spawn.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/stat.h>
-#include <sys/wait.h>
-
-#include "ast.h"
-#include "compile.h"
-#include "cordhelpers.h"
-#include "parse.h"
-#include "repl.h"
-#include "stdlib/arrays.h"
-#include "stdlib/bools.h"
-#include "stdlib/bytes.h"
-#include "stdlib/datatypes.h"
-#include "stdlib/integers.h"
-#include "stdlib/optionals.h"
-#include "stdlib/patterns.h"
-#include "stdlib/paths.h"
-#include "stdlib/text.h"
-#include "typecheck.h"
-#include "types.h"
-
-#define run_cmd(...) ({ const char *_cmd = heap_strf(__VA_ARGS__); if (verbose) printf("\033[34;1m%s\033[m\n", _cmd); popen(_cmd, "w"); })
-#define array_str(arr) Text$as_c_string(Text$join(Text(" "), arr))
-
-static struct stat compiler_stat;
-
-static const char *paths_str(Array_t paths) {
-    Text_t result = EMPTY_TEXT;
-    for (int64_t i = 0; i < paths.length; i++) {
-        if (i > 0) result = Texts(result, Text(" "));
-        result = Texts(result, Path$as_text((Path_t*)(paths.data + i*paths.stride), false, &Path$info));
-    }
-    return Text$as_c_string(result);
-}
-
-static OptionalArray_t files = NONE_ARRAY,
-                       args = NONE_ARRAY,
-                       uninstall = NONE_ARRAY,
-                       libraries = NONE_ARRAY;
-static OptionalBool_t verbose = false,
-                      quiet = false,
-                      stop_at_transpile = false,
-                      stop_at_obj_compilation = false,
-                      compile_exe = false,
-                      should_install = false,
-                      run_repl = false,
-                      clean_build = false;
-
-static OptionalText_t 
-            show_codegen = NONE_TEXT,
-            cflags = Text("-Werror -fdollars-in-identifiers -std=gnu11 -Wno-trigraphs -fsanitize=signed-integer-overflow -fno-sanitize-recover"
-                          " -fno-signed-zeros -fno-finite-math-only -fno-signaling-nans -fno-trapping-math"
-                          " -D_XOPEN_SOURCE=700 -D_POSIX_C_SOURCE=200809L -D_DEFAULT_SOURCE -fPIC -ggdb"
-                          " -DGC_THREADS"
-                          " -I$HOME/.local/share/tomo/installed"),
-            ldlibs = Text("-lgc -lgmp -lm -ltomo"),
-            ldflags = Text("-Wl,-rpath='$ORIGIN',-rpath=$HOME/.local/share/tomo/lib -L. -L$HOME/.local/share/tomo/lib"),
-            optimization = Text("2"),
-            cc = Text("gcc");
-
-static void transpile_header(env_t *base_env, Path_t path);
-static void transpile_code(env_t *base_env, Path_t path);
-static void compile_object_file(Path_t path);
-static Path_t compile_executable(env_t *base_env, Path_t path, Path_t exe_path, Array_t object_files, Array_t extra_ldlibs);
-static void build_file_dependency_graph(Path_t path, Table_t *to_compile, Table_t *to_link);
-static Text_t escape_lib_name(Text_t lib_name);
-static void build_library(Text_t lib_dir_name);
-static void compile_files(env_t *env, Array_t files, Array_t *object_files, Array_t *ldlibs);
-static bool is_stale(Path_t path, Path_t relative_to);
-
-typedef struct {
-    bool h:1, c:1, o:1;
-} staleness_t;
-
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wstack-protector"
-int main(int argc, char *argv[])
-{
-    // Get the file modification time of the compiler, so we
-    // can recompile files after changing the compiler:
-    if (stat(argv[0], &compiler_stat) != 0)
-        err(1, "Could not find age of compiler");
-
-    if (register_printf_specifier('T', printf_type, printf_pointer_size))
-        errx(1, "Couldn't set printf specifier");
-    if (register_printf_specifier('W', printf_ast, printf_pointer_size))
-        errx(1, "Couldn't set printf specifier");
-    if (register_printf_specifier('k', printf_text, printf_text_size))
-        errx(1, "Couldn't set printf specifier");
-    
-    // Run a tool:
-    if ((streq(argv[1], "-r") || streq(argv[1], "--run")) && argc >= 3) {
-        if (strcspn(argv[2], "/;$") == strlen(argv[2])) {
-            const char *program = heap_strf("%s/.local/share/tomo/installed/%s/%s", getenv("HOME"), argv[2], argv[2]);
-            execv(program, &argv[2]);
-        }
-        errx(1, "This is not an installed tomo program: \033[31;1m%s\033[m", argv[2]);
-    }
-
-    Text_t usage = Text("\x1b[33;4;1mUsage:\x1b[m\n"
-                        "\x1b[1mRun a program:\x1b[m         tomo file.tm [-- args...]\n"
-                        "\x1b[1mTranspile files:\x1b[m       tomo -t file.tm...\n"
-                        "\x1b[1mCompile object files:\x1b[m  tomo -c file.tm...\n"
-                        "\x1b[1mCompile executables:\x1b[m   tomo -e file.tm...\n"
-                        "\x1b[1mBuild libraries:\x1b[m       tomo -L lib...\n"
-                        "\x1b[1mUninstall libraries:\x1b[m   tomo -u lib...\n"
-                        "\x1b[1mOther flags:\x1b[m\n"
-                        "  --verbose|-v: verbose output\n"
-                        "  --quiet|-q: quiet output\n"
-                        "  --install|-I: install the executable or library\n"
-                        "  --c-compiler <compiler>: the C compiler to use (default: cc)\n"
-                        "  --optimization|-O <level>: set optimization level\n"
-                        "  --run|-r: run a program from ~/.local/share/tomo/installed\n"
-                        );
-    Text_t help = Texts(Text("\x1b[1mtomo\x1b[m: a compiler for the Tomo programming language"), Text("\n\n"), usage);
-    tomo_parse_args(
-        argc, argv, usage, help,
-        {"files", true, Array$info(&Path$info), &files},
-        {"args", true, Array$info(&Text$info), &args},
-        {"verbose", false, &Bool$info, &verbose},
-        {"v", false, &Bool$info, &verbose},
-        {"quiet", false, &Bool$info, &quiet},
-        {"q", false, &Bool$info, &quiet},
-        {"transpile", false, &Bool$info, &stop_at_transpile},
-        {"t", false, &Bool$info, &stop_at_transpile},
-        {"compile-obj", false, &Bool$info, &stop_at_obj_compilation},
-        {"c", false, &Bool$info, &stop_at_obj_compilation},
-        {"compile-exe", false, &Bool$info, &compile_exe},
-        {"e", false, &Bool$info, &compile_exe},
-        {"uninstall", false, Array$info(&Text$info), &uninstall},
-        {"u", false, Array$info(&Text$info), &uninstall},
-        {"library", false, Array$info(&Path$info), &libraries},
-        {"L", false, Array$info(&Path$info), &libraries},
-        {"show-codegen", false, &Text$info, &show_codegen},
-        {"C", false, &Text$info, &show_codegen},
-        {"repl", false, &Bool$info, &run_repl},
-        {"R", false, &Bool$info, &run_repl},
-        {"install", false, &Bool$info, &should_install},
-        {"I", false, &Bool$info, &should_install},
-        {"c-compiler", false, &Text$info, &cc},
-        {"optimization", false, &Text$info, &optimization},
-        {"O", false, &Text$info, &optimization},
-        {"force-rebuild", false, &Bool$info, &clean_build},
-        {"f", false, &Bool$info, &clean_build},
-    );
-
-    if (show_codegen.length > 0 && Text$equal_values(show_codegen, Text("pretty")))
-        show_codegen = Text("sed '/^#line/d;/^$/d' | indent -o /dev/stdout | bat -l c -P");
-
-    for (int64_t i = 0; i < uninstall.length; i++) {
-        Text_t *u = (Text_t*)(uninstall.data + i*uninstall.stride);
-        system(heap_strf("rm -rvf ~/.local/share/tomo/installed/%k ~/.local/share/tomo/lib/lib%k.so", u, u));
-        printf("Uninstalled %k\n", u);
-    }
-
-    for (int64_t i = 0; i < libraries.length; i++) {
-        Path_t *lib = (Path_t*)(libraries.data + i*libraries.stride);
-        const char *lib_str = Path$as_c_string(*lib);
-        char *cwd = get_current_dir_name();
-        if (chdir(lib_str) != 0)
-            errx(1, "Could not enter directory: %s", lib_str);
-
-        char *libdir = get_current_dir_name();
-        char *libdirname = basename(libdir);
-        build_library(Text$from_str(libdirname));
-        free(libdir);
-        chdir(cwd);
-        free(cwd);
-    }
-
-    // TODO: REPL
-    if (run_repl) {
-        repl();
-        return 0;
-    }
-
-    if (files.length <= 0 && (uninstall.length > 0 || libraries.length > 0)) {
-        return 0;
-    }
-
-    // Convert `foo` to `foo/foo.tm`
-    for (int64_t i = 0; i < files.length; i++) {
-        Path_t *path = (Path_t*)(files.data + i*files.stride);
-        if (Path$is_directory(*path, true))
-            *path = Path$with_component(*path, Texts(Path$base_name(*path), Text(".tm")));
-    }
-
-    if (files.length < 1)
-        errx(1, "No file specified!");
-    else if (files.length != 1)
-        errx(1, "Too many files specified!");
-
-    quiet = !verbose;
-
-    for (int64_t i = 0; i < files.length; i++) {
-        Path_t path = *(Path_t*)(files.data + i*files.stride);
-        Path_t exe_path = compile_exe ? Path$with_extension(path, Text(""), true)
-            : Path$write_unique_bytes(Path("/tmp/tomo-exe-XXXXXX"), (Array_t){});
-
-        pid_t child = fork();
-        if (child == 0) {
-            env_t *env = global_env();
-            Array_t object_files = {},
-                    extra_ldlibs = {};
-            compile_files(env, files, &object_files, &extra_ldlibs);
-            compile_executable(env, path, exe_path, object_files, extra_ldlibs);
-
-            if (compile_exe)
-                _exit(0);
-
-            char *prog_args[1 + args.length + 1];
-            prog_args[0] = (char*)Path$as_c_string(exe_path);
-            for (int64_t j = 0; j < args.length; j++)
-                prog_args[j + 1] = Text$as_c_string(*(Text_t*)(args.data + j*args.stride));
-            prog_args[1 + args.length] = NULL;
-            execv(prog_args[0], prog_args);
-            err(1, "Could not execute program: %s", prog_args[0]);
-        }
-
-        int status;
-        while (waitpid(child, &status, 0) < 0 && errno == EINTR) {
-            if (WIFEXITED(status) || WIFSIGNALED(status))
-                break;
-            else if (WIFSTOPPED(status))
-                kill(child, SIGCONT);
-        }
-
-        if (!compile_exe)
-            Path$remove(exe_path, true);
-
-        if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
-            _exit(WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE);
-        }
-    }
-
-    if (compile_exe && should_install) {
-        for (int64_t i = 0; i < files.length; i++) {
-            Path_t path = *(Path_t*)(files.data + i*files.stride);
-            Path_t exe = Path$with_extension(path, Text(""), true);
-            system(heap_strf("cp -v '%s' ~/.local/bin/", Path$as_c_string(exe)));
-        }
-    }
-    return 0;
-}
-#pragma GCC diagnostic pop
-
-Text_t escape_lib_name(Text_t lib_name)
-{
-    return Text$replace(lib_name, Pattern("{1+ !alphanumeric}"), Text("_"), Pattern(""), false);
-}
-
-static Path_t build_file(Path_t path, const char *extension)
-{
-    Path_t build_dir = Path$with_component(Path$parent(path), Text(".build"));
-    if (mkdir(Path$as_c_string(build_dir), 0777) != 0) {
-        if (errno != EEXIST)
-            err(1, "Could not make .build directory");
-    }
-    return Path$with_component(build_dir, Texts(Path$base_name(path), Text$from_str(extension)));
-}
-
-typedef struct {
-    env_t *env;
-    Table_t *used_imports;
-    FILE *output;
-} libheader_info_t;
-
-static void _compile_statement_header_for_library(libheader_info_t *info, ast_t *ast)
-{
-    if (ast->tag == Declare && Match(ast, Declare)->value->tag == Use)
-        ast = Match(ast, Declare)->value;
-
-    if (ast->tag == Use) {
-        auto use = Match(ast, Use);
-        if (use->what == USE_LOCAL)
-            return;
-
-        Path_t path = Path$from_str(use->path);
-        if (!Table$get(*info->used_imports, &path, Table$info(&Path$info, &Path$info))) {
-            Table$set(info->used_imports, &path, ((Bool_t[1]){1}), Table$info(&Text$info, &Bool$info));
-            CORD_put(compile_statement_type_header(info->env, ast), info->output);
-            CORD_put(compile_statement_namespace_header(info->env, ast), info->output);
-        }
-    } else {
-        CORD_put(compile_statement_type_header(info->env, ast), info->output);
-        CORD_put(compile_statement_namespace_header(info->env, ast), info->output);
-    }
-}
-
-static void _make_typedefs_for_library(libheader_info_t *info, ast_t *ast)
-{
-    if (ast->tag == StructDef) {
-        auto def = Match(ast, StructDef);
-        CORD full_name = CORD_cat(namespace_prefix(info->env, info->env->namespace), def->name);
-        CORD_put(CORD_all("typedef struct ", full_name, "$$struct ", full_name, "$$type;\n"), info->output);
-    } else if (ast->tag == EnumDef) {
-        auto def = Match(ast, EnumDef);
-        CORD full_name = CORD_cat(namespace_prefix(info->env, info->env->namespace), def->name);
-        CORD_put(CORD_all("typedef struct ", full_name, "$$struct ", full_name, "$$type;\n"), info->output);
-
-        for (tag_ast_t *tag = def->tags; tag; tag = tag->next) {
-            if (!tag->fields) continue;
-            CORD_put(CORD_all("typedef struct ", full_name, "$", tag->name, "$$struct ", full_name, "$", tag->name, "$$type;\n"), info->output);
-        }
-    } else if (ast->tag == LangDef) {
-        auto def = Match(ast, LangDef);
-        CORD_put(CORD_all("typedef Text_t ", namespace_prefix(info->env, info->env->namespace), def->name, "$$type;\n"), info->output);
-    }
-}
-
-static void _compile_file_header_for_library(env_t *env, Path_t path, Table_t *visited_files, Table_t *used_imports, FILE *output)
-{
-    if (Table$get(*visited_files, &path, Table$info(&Path$info, &Bool$info)))
-        return;
-
-    Table$set(visited_files, &path, ((Bool_t[1]){1}), Table$info(&Path$info, &Bool$info));
-
-    ast_t *file_ast = parse_file(Path$as_c_string(path), NULL);
-    if (!file_ast) errx(1, "Could not parse file %s", Path$as_c_string(path));
-    env_t *module_env = load_module_env(env, file_ast);
-
-    libheader_info_t info = {
-        .env=module_env,
-        .used_imports=used_imports,
-        .output=output,
-    };
-
-    // Visit files in topological order:
-    for (ast_list_t *stmt = Match(file_ast, Block)->statements; stmt; stmt = stmt->next) {
-        ast_t *ast = stmt->ast;
-        if (ast->tag == Declare)
-            ast = Match(ast, Declare)->value;
-        if (ast->tag != Use) continue;
-
-        auto use = Match(ast, Use);
-        if (use->what == USE_LOCAL) {
-            Path_t resolved = Path$resolved(Path$from_str(use->path), Path("./"));
-            _compile_file_header_for_library(env, resolved, visited_files, used_imports, output);
-        }
-    }
-
-    visit_topologically(
-        Match(file_ast, Block)->statements, (Closure_t){.fn=(void*)_make_typedefs_for_library, &info});
-    visit_topologically(
-        Match(file_ast, Block)->statements, (Closure_t){.fn=(void*)_compile_statement_header_for_library, &info});
-
-    CORD_fprintf(output, "void %r$initialize(void);\n", namespace_prefix(module_env, module_env->namespace));
-}
-
-void build_library(Text_t lib_dir_name)
-{
-    Array_t tm_files = Path$glob(Path("./[!._0-9]*.tm"));
-    env_t *env = fresh_scope(global_env());
-    Array_t object_files = {},
-            extra_ldlibs = {};
-    compile_files(env, tm_files, &object_files, &extra_ldlibs);
-
-    // Library name replaces all stretchs of non-alphanumeric chars with an underscore
-    // So e.g. https://github.com/foo/baz --> https_github_com_foo_baz
-    env->libname = Text$as_c_string(escape_lib_name(lib_dir_name));
-
-    // Build a "whatever.h" header that loads all the headers:
-    FILE *header = fopen(heap_strf("%k.h", &lib_dir_name), "w");
-    fputs("#pragma once\n", header);
-    fputs("#include <tomo/tomo.h>\n", header);
-    Table_t visited_files = {};
-    Table_t used_imports = {};
-    for (int64_t i = 0; i < tm_files.length; i++) {
-        Path_t f = *(Path_t*)(tm_files.data + i*tm_files.stride);
-        Path_t resolved = Path$resolved(f, Path("."));
-        _compile_file_header_for_library(env, resolved, &visited_files, &used_imports, header);
-    }
-    if (fclose(header) == -1)
-        errx(1, "Failed to write header file: %k.h", &lib_dir_name);
-
-    // Build up a list of symbol renamings:
-    unlink(".build/symbol_renames.txt");
-    FILE *prog;
-    for (int64_t i = 0; i < tm_files.length; i++) {
-        Path_t f = *(Path_t*)(tm_files.data + i*tm_files.stride);
-        prog = run_cmd("nm -Ug -fjust-symbols '%s' | sed -n 's/_\\$\\(.*\\)/\\0 _$%s$\\1/p' >>.build/symbol_renames.txt",
-                       Path$as_c_string(build_file(f, ".o")), CORD_to_const_char_star(env->libname));
-        if (!prog) errx(1, "Could not find symbols!");
-        int status = pclose(prog);
-        if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
-            errx(WEXITSTATUS(status), "Failed to create symbol rename table with `nm` and `sed`");
-    }
-
-    prog = run_cmd("%k -O%k %k %k %k %s -Wl,-soname='lib%k.so' -shared %s -o 'lib%k.so'",
-                   &cc, &optimization, &cflags, &ldflags, &ldlibs, array_str(extra_ldlibs), &lib_dir_name,
-                   paths_str(object_files), &lib_dir_name);
-    if (!prog)
-        errx(1, "Failed to run C compiler: %k", &cc);
-    int status = pclose(prog);
-    if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
-        exit(EXIT_FAILURE);
-
-    if (!quiet)
-        printf("Compiled library:\tlib%k.so\n", &lib_dir_name);
-
-    prog = run_cmd("objcopy --redefine-syms=.build/symbol_renames.txt 'lib%k.so'", &lib_dir_name);
-    status = pclose(prog);
-    if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
-        errx(WEXITSTATUS(status), "Failed to run `objcopy` to add library prefix to symbols");
-
-    prog = run_cmd("patchelf --rename-dynamic-symbols .build/symbol_renames.txt 'lib%k.so'", &lib_dir_name);
-    status = pclose(prog);
-    if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
-        errx(WEXITSTATUS(status), "Failed to run `patchelf` to rename dynamic symbols with library prefix");
-
-    if (verbose)
-        CORD_printf("Successfully renamed symbols with library prefix!\n");
-
-    // unlink(".build/symbol_renames.txt");
-
-    if (should_install) {
-        char *library_directory = get_current_dir_name();
-        const char *dest = heap_strf("%s/.local/share/tomo/installed/%k", getenv("HOME"), &lib_dir_name);
-        if (!streq(library_directory, dest)) {
-            system(heap_strf("rm -rf '%s'", dest));
-            system(heap_strf("mkdir -p '%s'", dest));
-            system(heap_strf("cp -r * '%s/'", dest));
-        }
-        system("mkdir -p ~/.local/share/tomo/lib/");
-        system(heap_strf("ln -f -s ../installed/'%k'/lib'%k'.so  ~/.local/share/tomo/lib/lib'%k'.so",
-                         &lib_dir_name, &lib_dir_name, &lib_dir_name));
-        printf("Installed \033[1m%k\033[m to ~/.local/share/tomo/installed\n", &lib_dir_name);
-        free(library_directory);
-    }
-}
-
-void compile_files(env_t *env, Array_t to_compile, Array_t *object_files, Array_t *extra_ldlibs)
-{
-    Table_t to_link = {};
-    Table_t dependency_files = {};
-    for (int64_t i = 0; i < to_compile.length; i++) {
-        Path_t filename = *(Path_t*)(to_compile.data + i*to_compile.stride);
-        Text_t extension = Path$extension(filename, true);
-        if (!Text$equal_values(extension, Text("tm")))
-            errx(1, "Not a valid .tm file: \x1b[31;1m%s\x1b[m", Path$as_c_string(filename));
-        Path_t resolved = Path$resolved(filename, Path("./"));
-        if (!Path$is_file(resolved, true))
-            errx(1, "Couldn't find file: %s", Path$as_c_string(resolved));
-        build_file_dependency_graph(resolved, &dependency_files, &to_link);
-    }
-
-    int status;
-    // (Re)compile header files, eagerly for explicitly passed in files, lazily
-    // for downstream dependencies:
-    for (int64_t i = 0; i < dependency_files.entries.length; i++) {
-        struct {
-            Path_t filename;
-            staleness_t staleness;
-        } *entry = (dependency_files.entries.data + i*dependency_files.entries.stride);
-        if (entry->staleness.h) {
-            transpile_header(env, entry->filename);
-            entry->staleness.o = true;
-        }
-    }
-
-    env->imports = new(Table_t);
-
-    struct child_s {
-        struct child_s *next;
-        pid_t pid;
-    } *child_processes = NULL;
-
-    // (Re)transpile and compile object files, eagerly for files explicitly
-    // specified and lazily for downstream dependencies:
-    for (int64_t i = 0; i < dependency_files.entries.length; i++) {
-        struct {
-            Path_t filename;
-            staleness_t staleness;
-        } *entry = (dependency_files.entries.data + i*dependency_files.entries.stride);
-        if (!clean_build && !entry->staleness.c && !entry->staleness.h)
-            continue;
-
-        pid_t pid = fork();
-        if (pid == 0) {
-            transpile_code(env, entry->filename);
-            if (!stop_at_transpile)
-                compile_object_file(entry->filename);
-            _exit(EXIT_SUCCESS);
-        }
-        child_processes = new(struct child_s, .next=child_processes, .pid=pid);
-    }
-
-    for (; child_processes; child_processes = child_processes->next) {
-        waitpid(child_processes->pid, &status, 0);
-        if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
-            exit(EXIT_FAILURE);
-        else if (WIFSTOPPED(status))
-            kill(child_processes->pid, SIGCONT);
-    }
-
-    if (object_files) {
-        for (int64_t i = 0; i < dependency_files.entries.length; i++) {
-            Path_t path = *(Path_t*)(dependency_files.entries.data + i*dependency_files.entries.stride);
-            path = build_file(path, ".o");
-            Array$insert(object_files, &path, I(0), sizeof(Path_t));
-        }
-    }
-    if (extra_ldlibs) {
-        for (int64_t i = 0; i < to_link.entries.length; i++) {
-            Text_t lib = *(Text_t*)(to_link.entries.data + i*to_link.entries.stride);
-            Array$insert(extra_ldlibs, &lib, I(0), sizeof(Text_t));
-        }
-    }
-}
-
-void build_file_dependency_graph(Path_t path, Table_t *to_compile, Table_t *to_link)
-{
-    if (Table$get(*to_compile, &path, Table$info(&Path$info, &Byte$info)))
-        return;
-
-    staleness_t staleness = {
-        .h=is_stale(build_file(path, ".h"), path),
-        .c=is_stale(build_file(path, ".c"), path),
-    };
-    staleness.o = staleness.c || staleness.h
-        || is_stale(build_file(path, ".o"), build_file(path, ".c"))
-        || is_stale(build_file(path, ".o"), build_file(path, ".h"));
-    Table$set(to_compile, &path, &staleness, Table$info(&Path$info, &Byte$info));
-
-    assert(Text$equal_values(Path$extension(path, true), Text("tm")));
-
-    ast_t *ast = parse_file(Path$as_c_string(path), NULL);
-    if (!ast)
-        errx(1, "Could not parse file %s", Path$as_c_string(path));
-
-    for (ast_list_t *stmt = Match(ast, Block)->statements; stmt; stmt = stmt->next) {
-        ast_t *stmt_ast = stmt->ast;
-        if (stmt_ast->tag == Declare)
-            stmt_ast = Match(stmt_ast, Declare)->value;
-
-        if (stmt_ast->tag != Use) continue;
-        auto use = Match(stmt_ast, Use);
-
-        switch (use->what) {
-        case USE_LOCAL: {
-            Path_t dep_tm = Path$resolved(Path$from_str(use->path), Path$parent(path));
-            if (is_stale(build_file(path, ".h"), dep_tm))
-                staleness.h = true;
-            if (is_stale(build_file(path, ".c"), dep_tm))
-                staleness.c = true;
-            if (staleness.c || staleness.h)
-                staleness.o = true;
-            Table$set(to_compile, &path, &staleness, Table$info(&Path$info, &Byte$info));
-            build_file_dependency_graph(dep_tm, to_compile, to_link);
-            break;
-        }
-        case USE_MODULE: {
-            Text_t lib = Text$format("'%s/.local/share/tomo/installed/%s/lib%s.so'", getenv("HOME"), use->path, use->path);
-            Table$set(to_link, &lib, ((Bool_t[1]){1}), Table$info(&Text$info, &Bool$info));
-
-            Array_t children = Path$glob(Path$from_str(heap_strf("%s/.local/share/tomo/installed/%s/*.tm", getenv("HOME"), use->path)));
-            for (int64_t i = 0; i < children.length; i++) {
-                Path_t *child = (Path_t*)(children.data + i*children.stride);
-                Table_t discarded = {.fallback=to_compile};
-                build_file_dependency_graph(*child, &discarded, to_link);
-            }
-            break;
-        }
-        case USE_SHARED_OBJECT: {
-            Text_t lib = Text$format("-l:%s", use->path);
-            Table$set(to_link, &lib, ((Bool_t[1]){1}), Table$info(&Text$info, &Bool$info));
-            break;
-        }
-        case USE_ASM: {
-            Text_t linker_text = Path$as_text(&use->path, false, &Path$info);
-            Table$set(to_link, &linker_text, ((Bool_t[1]){1}), Table$info(&Text$info, &Bool$info));
-            break;
-        }
-        default: case USE_HEADER: break;
-        }
-    }
-}
-
-bool is_stale(Path_t path, Path_t relative_to)
-{
-    struct stat target_stat;
-    if (stat(Path$as_c_string(path), &target_stat) != 0)
-        return true;
-
-    // Any file older than the compiler is stale:
-    if (target_stat.st_mtime < compiler_stat.st_mtime)
-        return true;
-
-    struct stat relative_to_stat;
-    if (stat(Path$as_c_string(relative_to), &relative_to_stat) != 0)
-        errx(1, "File doesn't exist: %s", Path$as_c_string(relative_to));
-    return target_stat.st_mtime < relative_to_stat.st_mtime;
-}
-
-void transpile_header(env_t *base_env, Path_t path)
-{
-    Path_t h_filename = build_file(path, ".h");
-    ast_t *ast = parse_file(Path$as_c_string(path), NULL);
-    if (!ast)
-        errx(1, "Could not parse file %s", Path$as_c_string(path));
-
-    env_t *module_env = load_module_env(base_env, ast);
-
-    CORD h_code = compile_file_header(module_env, ast);
-
-    FILE *header = fopen(Path$as_c_string(h_filename), "w");
-    if (!header)
-        errx(1, "Failed to open header file: %s", Path$as_c_string(h_filename));
-    CORD_put(h_code, header);
-    if (fclose(header) == -1)
-        errx(1, "Failed to write header file: %s", Path$as_c_string(h_filename));
-
-    if (!quiet)
-        printf("Transpiled header:\t%s\n", Path$as_c_string(h_filename));
-
-    if (show_codegen.length > 0)
-        system(heap_strf("<%s %k", Path$as_c_string(h_filename), &show_codegen));
-}
-
-void transpile_code(env_t *base_env, Path_t path)
-{
-    Path_t c_filename = build_file(path, ".c");
-    ast_t *ast = parse_file(Path$as_c_string(path), NULL);
-    if (!ast)
-        errx(1, "Could not parse file %s", Path$as_c_string(path));
-
-    env_t *module_env = load_module_env(base_env, ast);
-
-    CORD c_code = compile_file(module_env, ast);
-
-    FILE *c_file = fopen(Path$as_c_string(c_filename), "w");
-    if (!c_file)
-        errx(1, "Failed to write C file: %s", Path$as_c_string(c_filename));
-
-    CORD_put(c_code, c_file);
-
-    binding_t *main_binding = get_binding(module_env, "main");
-    if (main_binding && main_binding->type->tag == FunctionType) {
-        type_t *ret = Match(main_binding->type, FunctionType)->ret;
-        if (ret->tag != VoidType && ret->tag != AbortType)
-            compiler_err(ast->file, ast->start, ast->end, "The main() function in this file has a return type of %T, but it should not have any return value!", ret);
-
-        CORD_put(CORD_all(
-            "int ", main_binding->code, "$parse_and_run(int argc, char *argv[]) {\n"
-            "#line 1\n"
-            "tomo_init();\n",
-            "_$", module_env->namespace->name, "$$initialize();\n"
-            "\n",
-            compile_cli_arg_call(module_env, main_binding->code, main_binding->type),
-            "return 0;\n"
-            "}\n"), c_file);
-    }
-
-    if (fclose(c_file) == -1)
-        errx(1, "Failed to output C code to %s", Path$as_c_string(c_filename));
-
-    if (!quiet)
-        printf("Transpiled code:\t%s\n", Path$as_c_string(c_filename));
-
-    if (show_codegen.length > 0)
-        system(heap_strf("<%s %k", Path$as_c_string(c_filename), &show_codegen));
-}
-
-void compile_object_file(Path_t path)
-{
-    Path_t obj_file = build_file(path, ".o");
-    Path_t c_file = build_file(path, ".c");
-
-    FILE *prog = run_cmd("%k %k -O%k -c %s -o %s",
-                         &cc, &cflags, &optimization, Path$as_c_string(c_file), Path$as_c_string(obj_file));
-    if (!prog)
-        errx(1, "Failed to run C compiler: %k", &cc);
-    int status = pclose(prog);
-    if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
-        exit(EXIT_FAILURE);
-
-    if (!quiet)
-        printf("Compiled object:\t%s\n", Path$as_c_string(obj_file));
-}
-
-Path_t compile_executable(env_t *base_env, Path_t path, Path_t exe_path, Array_t object_files, Array_t extra_ldlibs)
-{
-    ast_t *ast = parse_file(Path$as_c_string(path), NULL);
-    if (!ast)
-        errx(1, "Could not parse file %s", Path$as_c_string(path));
-    env_t *env = load_module_env(base_env, ast);
-    binding_t *main_binding = get_binding(env, "main");
-    if (!main_binding || main_binding->type->tag != FunctionType)
-        errx(1, "No main() function has been defined for %s, so it can't be run!", Path$as_c_string(path));
-
-    FILE *runner = run_cmd("%k %k -O%k %k %k %s %s -x c - -o %s",
-                           &cc, &cflags, &optimization, &ldflags, &ldlibs,
-                           array_str(extra_ldlibs), paths_str(object_files), Path$as_c_string(exe_path));
-    CORD program = CORD_all(
-        "extern int ", main_binding->code, "$parse_and_run(int argc, char *argv[]);\n"
-        "int main(int argc, char *argv[]) {\n"
-        "\treturn ", main_binding->code, "$parse_and_run(argc, argv);\n"
-        "}\n"
-    );
-
-    if (show_codegen.length > 0) {
-        FILE *out = run_cmd("%k", &show_codegen);
-        CORD_put(program, out);
-        pclose(out);
-    }
-
-    CORD_put(program, runner);
-    int status = pclose(runner);
-    if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
-        exit(EXIT_FAILURE);
-
-    if (!quiet)
-        printf("Compiled executable:\t%s\n", Path$as_c_string(exe_path));
-    return exe_path;
-}
-
-// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0