forked from lix-project/lix
Figure out the user's home directory if $HOME is not set
This commit is contained in:
parent
eba840c8a1
commit
465cb68244
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@ -16,8 +16,6 @@
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<dict>
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<dict>
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<key>NIX_SSL_CERT_FILE</key>
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<key>NIX_SSL_CERT_FILE</key>
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<string>/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt</string>
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<string>/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt</string>
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<key>XDG_CACHE_HOME</key>
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<string>/root/.cache</string>
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</dict>
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</dict>
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</dict>
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</dict>
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</plist>
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</plist>
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@ -7,5 +7,3 @@ ConditionPathIsReadWrite=@localstatedir@/nix/daemon-socket
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[Service]
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[Service]
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ExecStart=@@bindir@/nix-daemon nix-daemon --daemon
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ExecStart=@@bindir@/nix-daemon nix-daemon --daemon
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KillMode=process
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KillMode=process
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Environment=XDG_CACHE_HOME=/root/.cache
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Environment=XDG_CONFIG_HOME=/root/.config
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@ -376,7 +376,7 @@ expr_simple
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$$ = stripIndentation(CUR_POS, data->symbols, *$2);
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$$ = stripIndentation(CUR_POS, data->symbols, *$2);
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}
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}
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| PATH { $$ = new ExprPath(absPath($1, data->basePath)); }
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| PATH { $$ = new ExprPath(absPath($1, data->basePath)); }
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| HPATH { $$ = new ExprPath(getEnv("HOME", "") + string{$1 + 1}); }
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| HPATH { $$ = new ExprPath(getHome() + string{$1 + 1}); }
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| SPATH {
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| SPATH {
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string path($1 + 1, strlen($1) - 2);
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string path($1 + 1, strlen($1) - 2);
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$$ = new ExprApp(CUR_POS,
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$$ = new ExprApp(CUR_POS,
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48
src/libutil/lazy.hh
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48
src/libutil/lazy.hh
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@ -0,0 +1,48 @@
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#include <exception>
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#include <functional>
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#include <mutex>
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namespace nix {
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/* A helper class for lazily-initialized variables.
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Lazy<T> var([]() { return value; });
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declares a variable of type T that is initialized to 'value' (in a
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thread-safe way) on first use, that is, when var() is first
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called. If the initialiser code throws an exception, then all
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subsequent calls to var() will rethrow that exception. */
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template<typename T>
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class Lazy
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{
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typedef std::function<T()> Init;
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Init init;
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std::once_flag done;
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T value;
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std::exception_ptr ex;
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public:
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Lazy(Init init) : init(init)
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{ }
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const T & operator () ()
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{
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std::call_once(done, [&]() {
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try {
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value = init();
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} catch (...) {
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ex = std::current_exception();
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}
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});
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if (ex) std::rethrow_exception(ex);
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return value;
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}
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};
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}
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@ -1,3 +1,4 @@
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#include "lazy.hh"
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#include "util.hh"
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#include "util.hh"
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#include "affinity.hh"
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#include "affinity.hh"
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#include "sync.hh"
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#include "sync.hh"
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@ -13,10 +14,12 @@
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#include <thread>
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#include <thread>
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#include <future>
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#include <future>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <limits.h>
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#include <pwd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#ifdef __APPLE__
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#ifdef __APPLE__
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#include <sys/syscall.h>
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#include <sys/syscall.h>
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@ -417,14 +420,28 @@ Path createTempDir(const Path & tmpRoot, const Path & prefix,
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}
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}
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static Lazy<Path> getHome2([]() {
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Path homeDir = getEnv("HOME");
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if (homeDir.empty()) {
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char buf[16384];
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struct passwd pwbuf;
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struct passwd * pw;
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if (getpwuid_r(getuid(), &pwbuf, buf, sizeof(buf), &pw) != 0
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|| !pw || !pw->pw_dir || !pw->pw_dir[0])
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throw Error("cannot determine user's home directory");
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homeDir = pw->pw_dir;
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}
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return homeDir;
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});
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Path getHome() { return getHome2(); }
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Path getCacheDir()
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Path getCacheDir()
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{
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{
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Path cacheDir = getEnv("XDG_CACHE_HOME");
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Path cacheDir = getEnv("XDG_CACHE_HOME");
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if (cacheDir.empty()) {
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if (cacheDir.empty())
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Path homeDir = getEnv("HOME");
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cacheDir = getHome() + "/.cache";
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if (homeDir.empty()) throw Error("$XDG_CACHE_HOME and $HOME are not set");
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cacheDir = homeDir + "/.cache";
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}
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return cacheDir;
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return cacheDir;
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}
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}
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@ -432,11 +449,8 @@ Path getCacheDir()
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Path getConfigDir()
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Path getConfigDir()
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{
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{
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Path configDir = getEnv("XDG_CONFIG_HOME");
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Path configDir = getEnv("XDG_CONFIG_HOME");
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if (configDir.empty()) {
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if (configDir.empty())
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Path homeDir = getEnv("HOME");
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configDir = getHome() + "/.config";
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if (homeDir.empty()) throw Error("$XDG_CONFIG_HOME and $HOME are not set");
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configDir = homeDir + "/.config";
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}
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return configDir;
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return configDir;
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}
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}
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@ -444,11 +458,8 @@ Path getConfigDir()
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Path getDataDir()
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Path getDataDir()
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{
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{
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Path dataDir = getEnv("XDG_DATA_HOME");
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Path dataDir = getEnv("XDG_DATA_HOME");
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if (dataDir.empty()) {
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if (dataDir.empty())
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Path homeDir = getEnv("HOME");
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dataDir = getHome() + "/.local/share";
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if (homeDir.empty()) throw Error("$XDG_DATA_HOME and $HOME are not set");
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dataDir = homeDir + "/.local/share";
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}
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return dataDir;
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return dataDir;
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}
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}
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@ -110,6 +110,9 @@ void deletePath(const Path & path, unsigned long long & bytesFreed);
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Path createTempDir(const Path & tmpRoot = "", const Path & prefix = "nix",
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Path createTempDir(const Path & tmpRoot = "", const Path & prefix = "nix",
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bool includePid = true, bool useGlobalCounter = true, mode_t mode = 0755);
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bool includePid = true, bool useGlobalCounter = true, mode_t mode = 0755);
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/* Return $HOME or the user's home directory from /etc/passwd. */
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Path getHome();
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/* Return $XDG_CACHE_HOME or $HOME/.cache. */
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/* Return $XDG_CACHE_HOME or $HOME/.cache. */
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Path getCacheDir();
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Path getCacheDir();
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@ -169,9 +169,7 @@ int main(int argc, char ** argv)
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setenv("NIX_DOWNLOAD_CACHE", channelCache.c_str(), 1);
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setenv("NIX_DOWNLOAD_CACHE", channelCache.c_str(), 1);
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// Figure out the name of the `.nix-channels' file to use
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// Figure out the name of the `.nix-channels' file to use
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auto home = getEnv("HOME");
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auto home = getHome();
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if (home.empty())
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throw Error("$HOME not set");
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channelsList = home + "/.nix-channels";
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channelsList = home + "/.nix-channels";
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nixDefExpr = home + "/.nix-defexpr";
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nixDefExpr = home + "/.nix-defexpr";
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@ -192,17 +192,9 @@ static void loadDerivations(EvalState & state, Path nixExprPath,
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}
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}
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static Path getHomeDir()
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{
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Path homeDir(getEnv("HOME", ""));
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if (homeDir == "") throw Error("HOME environment variable not set");
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return homeDir;
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}
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static Path getDefNixExprPath()
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static Path getDefNixExprPath()
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{
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{
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return getHomeDir() + "/.nix-defexpr";
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return getHome() + "/.nix-defexpr";
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}
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}
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@ -1188,7 +1180,7 @@ static void opSwitchProfile(Globals & globals, Strings opFlags, Strings opArgs)
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throw UsageError(format("exactly one argument expected"));
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throw UsageError(format("exactly one argument expected"));
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Path profile = absPath(opArgs.front());
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Path profile = absPath(opArgs.front());
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Path profileLink = getHomeDir() + "/.nix-profile";
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Path profileLink = getHome() + "/.nix-profile";
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switchLink(profileLink, profile);
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switchLink(profileLink, profile);
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}
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}
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@ -1413,7 +1405,7 @@ int main(int argc, char * * argv)
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globals.profile = getEnv("NIX_PROFILE", "");
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globals.profile = getEnv("NIX_PROFILE", "");
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if (globals.profile == "") {
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if (globals.profile == "") {
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Path profileLink = getHomeDir() + "/.nix-profile";
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Path profileLink = getHome() + "/.nix-profile";
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globals.profile = pathExists(profileLink)
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globals.profile = pathExists(profileLink)
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? absPath(readLink(profileLink), dirOf(profileLink))
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? absPath(readLink(profileLink), dirOf(profileLink))
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: canonPath(settings.nixStateDir + "/profiles/default");
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: canonPath(settings.nixStateDir + "/profiles/default");
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