resolve-system-dependencies: remove entirely
this hasn't been used since 2020, and hasn't been compiled since may. Change-Id: I865550966630eee6ba18d742ba36f0a90901279d
This commit is contained in:
eldritch horrors
parent
3b902683e9
commit
6491cde997
1 changed files with 0 additions and 190 deletions
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#include "derivations.hh"
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#include "globals.hh"
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#include "shared.hh"
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#include "store-api.hh"
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#include <sys/utsname.h>
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#include <algorithm>
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#include <iostream>
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#include <fstream>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include <mach-o/loader.h>
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#include <mach-o/swap.h>
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#define DO_SWAP(x, y) ((x) ? OSSwapInt32(y) : (y))
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using namespace nix;
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static auto cacheDir = Path{};
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Path resolveCacheFile(Path lib)
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{
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std::replace(lib.begin(), lib.end(), '/', '%');
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return cacheDir + "/" + lib;
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}
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std::set<std::string> readCacheFile(const Path & file)
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{
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return tokenizeString<std::set<std::string>>(readFile(file), "\n");
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}
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std::set<std::string> runResolver(const Path & filename)
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{
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AutoCloseFD fd{open(filename.c_str(), O_RDONLY)};
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if (!fd)
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throw SysError("opening '%s'", filename);
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struct stat st;
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if (fstat(fd.get(), &st))
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throw SysError("statting '%s'", filename);
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if (!S_ISREG(st.st_mode)) {
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printError("file '%s' is not a regular MACH binary", filename);
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return {};
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}
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if (st.st_size < sizeof(mach_header_64)) {
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printError("file '%s' is too short for a MACH binary", filename);
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return {};
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}
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char* obj = (char*) mmap(nullptr, st.st_size, PROT_READ, MAP_SHARED, fd.get(), 0);
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if (!obj)
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throw SysError("mmapping '%s'", filename);
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ptrdiff_t mach64_offset = 0;
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uint32_t magic = ((mach_header_64*) obj)->magic;
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if (magic == FAT_CIGAM || magic == FAT_MAGIC) {
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bool should_swap = magic == FAT_CIGAM;
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uint32_t narches = DO_SWAP(should_swap, ((fat_header *) obj)->nfat_arch);
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for (uint32_t i = 0; i < narches; i++) {
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fat_arch* arch = (fat_arch*) (obj + sizeof(fat_header) + sizeof(fat_arch) * i);
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if (DO_SWAP(should_swap, arch->cputype) == CPU_TYPE_X86_64) {
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mach64_offset = (ptrdiff_t) DO_SWAP(should_swap, arch->offset);
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break;
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}
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}
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if (mach64_offset == 0) {
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printError("could not find any mach64 blobs in file '%1%', continuing...", filename);
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return {};
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}
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} else if (magic == MH_MAGIC_64 || magic == MH_CIGAM_64) {
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mach64_offset = 0;
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} else {
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printError("Object file has unknown magic number '%1%', skipping it...", magic);
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return {};
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}
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mach_header_64 * m_header = (mach_header_64 *) (obj + mach64_offset);
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bool should_swap = magic == MH_CIGAM_64;
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ptrdiff_t cmd_offset = mach64_offset + sizeof(mach_header_64);
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std::set<std::string> libs;
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for (uint32_t i = 0; i < DO_SWAP(should_swap, m_header->ncmds); i++) {
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load_command * cmd = (load_command *) (obj + cmd_offset);
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switch(DO_SWAP(should_swap, cmd->cmd)) {
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case LC_LOAD_UPWARD_DYLIB:
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case LC_LOAD_DYLIB:
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case LC_REEXPORT_DYLIB:
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libs.insert(std::string((char *) cmd + ((dylib_command*) cmd)->dylib.name.offset));
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break;
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}
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cmd_offset += DO_SWAP(should_swap, cmd->cmdsize);
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}
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return libs;
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}
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bool isSymlink(const Path & path)
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{
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return S_ISLNK(lstat(path).st_mode);
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}
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Path resolveSymlink(const Path & path)
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{
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auto target = readLink(path);
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return target.starts_with("/")
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? target
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: concatStrings(dirOf(path), "/", target);
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}
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std::set<std::string> resolveTree(const Path & path, PathSet & deps)
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{
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std::set<std::string> results;
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if (!deps.insert(path).second) return {};
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for (auto & lib : runResolver(path)) {
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results.insert(lib);
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for (auto & p : resolveTree(lib, deps)) {
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results.insert(p);
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}
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}
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return results;
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}
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std::set<std::string> getPath(const Path & path)
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{
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if (path.starts_with("/dev")) return {};
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Path cacheFile = resolveCacheFile(path);
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if (pathExists(cacheFile))
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return readCacheFile(cacheFile);
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std::set<std::string> deps, paths;
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paths.insert(path);
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Path nextPath(path);
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while (isSymlink(nextPath)) {
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nextPath = resolveSymlink(nextPath);
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paths.insert(nextPath);
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}
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for (auto & t : resolveTree(nextPath, deps))
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paths.insert(t);
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writeFile(cacheFile, concatStringsSep("\n", paths));
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return paths;
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}
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int main(int argc, char ** argv)
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{
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return handleExceptions(argv[0], [&]() {
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initNix();
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struct utsname _uname;
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uname(&_uname);
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auto cacheParentDir = fmt("%1%/dependency-maps", settings.nixStateDir);
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cacheDir = fmt("%1%/%2%-%3%-%4%", cacheParentDir, _uname.machine, _uname.sysname, _uname.release);
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mkdir(cacheParentDir.c_str(), 0755);
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mkdir(cacheDir.c_str(), 0755);
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auto store = openStore();
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StringSet impurePaths;
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if (std::string(argv[1]) == "--test")
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impurePaths.insert(argv[2]);
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else {
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auto drv = store->derivationFromPath(store->parseStorePath(argv[1]));
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impurePaths = tokenizeString<StringSet>(getOr(drv.env, "__impureHostDeps", ""));
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impurePaths.insert("/usr/lib/libSystem.dylib");
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}
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std::set<std::string> allPaths;
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for (auto & path : impurePaths)
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for (auto & p : getPath(path))
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allPaths.insert(p);
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std::cout << "extra-chroot-dirs" << std::endl;
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for (auto & path : allPaths)
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std::cout << path << std::endl;
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std::cout << std::endl;
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});
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}
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