diff options
Diffstat (limited to 'src/buildenv')
| -rw-r--r-- | src/buildenv/buildenv.cc | 187 | ||||
| -rw-r--r-- | src/buildenv/local.mk | 9 |
2 files changed, 0 insertions, 196 deletions
diff --git a/src/buildenv/buildenv.cc b/src/buildenv/buildenv.cc deleted file mode 100644 index 2afad913ac6b..000000000000 --- a/src/buildenv/buildenv.cc +++ /dev/null @@ -1,187 +0,0 @@ -#include "shared.hh" -#include <sys/stat.h> -#include <sys/types.h> -#include <fcntl.h> -#include <algorithm> - -using namespace nix; - -typedef std::map<Path,int> Priorities; - -static bool isDirectory (const Path & path) -{ - struct stat st; - if (stat(path.c_str(), &st) == -1) - throw SysError(format("getting status of '%1%'") % path); - return S_ISDIR(st.st_mode); -} - -static auto priorities = Priorities{}; - -static auto symlinks = 0; - -/* For each activated package, create symlinks */ -static void createLinks(const Path & srcDir, const Path & dstDir, int priority) -{ - auto srcFiles = readDirectory(srcDir); - for (const auto & ent : srcFiles) { - if (ent.name[0] == '.') - /* not matched by glob */ - continue; - const auto & srcFile = srcDir + "/" + ent.name; - auto dstFile = dstDir + "/" + ent.name; - - /* The files below are special-cased to that they don't show up - * in user profiles, either because they are useless, or - * because they would cauase pointless collisions (e.g., each - * Python package brings its own - * `$out/lib/pythonX.Y/site-packages/easy-install.pth'.) - */ - if (hasSuffix(srcFile, "/propagated-build-inputs") || - hasSuffix(srcFile, "/nix-support") || - hasSuffix(srcFile, "/perllocal.pod") || - hasSuffix(srcFile, "/info/dir") || - hasSuffix(srcFile, "/log")) { - continue; - } else if (isDirectory(srcFile)) { - struct stat dstSt; - auto res = lstat(dstFile.c_str(), &dstSt); - if (res == 0) { - if (S_ISDIR(dstSt.st_mode)) { - createLinks(srcFile, dstFile, priority); - continue; - } else if (S_ISLNK(dstSt.st_mode)) { - auto target = readLink(dstFile); - if (!isDirectory(target)) - throw Error(format("collision between '%1%' and non-directory '%2%'") - % srcFile % target); - if (unlink(dstFile.c_str()) == -1) - throw SysError(format("unlinking '%1%'") % dstFile); - if (mkdir(dstFile.c_str(), 0755) == -1) - throw SysError(format("creating directory '%1%'")); - createLinks(target, dstFile, priorities[dstFile]); - createLinks(srcFile, dstFile, priority); - continue; - } - } else if (errno != ENOENT) - throw SysError(format("getting status of '%1%'") % dstFile); - } else { - struct stat dstSt; - auto res = lstat(dstFile.c_str(), &dstSt); - if (res == 0) { - if (S_ISLNK(dstSt.st_mode)) { - auto target = readLink(dstFile); - auto prevPriority = priorities[dstFile]; - if (prevPriority == priority) - throw Error(format( - "packages '%1%' and '%2%' have the same priority %3%; " - "use 'nix-env --set-flag priority NUMBER INSTALLED_PKGNAME' " - "to change the priority of one of the conflicting packages" - " (0 being the highest priority)" - ) % srcFile % target % priority); - if (prevPriority < priority) - continue; - if (unlink(dstFile.c_str()) == -1) - throw SysError(format("unlinking '%1%'") % dstFile); - } - } else if (errno != ENOENT) - throw SysError(format("getting status of '%1%'") % dstFile); - } - createSymlink(srcFile, dstFile); - priorities[dstFile] = priority; - symlinks++; - } -} - -typedef std::set<Path> FileProp; - -static auto done = FileProp{}; -static auto postponed = FileProp{}; - -static auto out = string{}; - -static void addPkg(const Path & pkgDir, int priority) -{ - if (done.find(pkgDir) != done.end()) - return; - done.insert(pkgDir); - createLinks(pkgDir, out, priority); - auto propagatedFN = pkgDir + "/nix-support/propagated-user-env-packages"; - auto propagated = string{}; - { - AutoCloseFD fd = open(propagatedFN.c_str(), O_RDONLY | O_CLOEXEC); - if (!fd) { - if (errno == ENOENT) - return; - throw SysError(format("opening '%1%'") % propagatedFN); - } - propagated = readFile(fd.get()); - } - for (const auto & p : tokenizeString<std::vector<string>>(propagated, " \n")) - if (done.find(p) == done.end()) - postponed.insert(p); -} - -struct Package { - Path path; - bool active; - int priority; - Package(Path path, bool active, int priority) : path{std::move(path)}, active{active}, priority{priority} {} -}; - -typedef std::vector<Package> Packages; - -int main(int argc, char ** argv) -{ - return handleExceptions(argv[0], [&]() { - initNix(); - out = getEnv("out"); - if (mkdir(out.c_str(), 0755) == -1) - throw SysError(format("creating %1%") % out); - - /* Convert the stuff we get from the environment back into a coherent - * data type. - */ - auto pkgs = Packages{}; - auto derivations = tokenizeString<Strings>(getEnv("derivations")); - while (!derivations.empty()) { - /* !!! We're trusting the caller to structure derivations env var correctly */ - auto active = derivations.front(); derivations.pop_front(); - auto priority = stoi(derivations.front()); derivations.pop_front(); - auto outputs = stoi(derivations.front()); derivations.pop_front(); - for (auto n = 0; n < outputs; n++) { - auto path = derivations.front(); derivations.pop_front(); - pkgs.emplace_back(path, active != "false", priority); - } - } - - /* Symlink to the packages that have been installed explicitly by the - * user. Process in priority order to reduce unnecessary - * symlink/unlink steps. - */ - std::sort(pkgs.begin(), pkgs.end(), [](const Package & a, const Package & b) { - return a.priority < b.priority || (a.priority == b.priority && a.path < b.path); - }); - for (const auto & pkg : pkgs) - if (pkg.active) - addPkg(pkg.path, pkg.priority); - - /* Symlink to the packages that have been "propagated" by packages - * installed by the user (i.e., package X declares that it wants Y - * installed as well). We do these later because they have a lower - * priority in case of collisions. - */ - auto priorityCounter = 1000; - while (!postponed.empty()) { - auto pkgDirs = postponed; - postponed = FileProp{}; - for (const auto & pkgDir : pkgDirs) - addPkg(pkgDir, priorityCounter++); - } - - std::cerr << "created " << symlinks << " symlinks in user environment\n"; - - createSymlink(getEnv("manifest"), out + "/manifest.nix"); - }); -} - diff --git a/src/buildenv/local.mk b/src/buildenv/local.mk deleted file mode 100644 index 17ec13b235f4..000000000000 --- a/src/buildenv/local.mk +++ /dev/null @@ -1,9 +0,0 @@ -programs += buildenv - -buildenv_DIR := $(d) - -buildenv_INSTALL_DIR := $(libexecdir)/nix - -buildenv_LIBS = libmain libstore libutil libformat - -buildenv_SOURCES := $(d)/buildenv.cc |