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Merge pull request #7918 from zimbatm/fix-empty-nix-store-env

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treat empty NIX_STORE_DIR env vars as unset
This commit is contained in:
Eelco Dolstra 2023-03-03 13:49:56 +01:00 committed by GitHub
commit 0507462c06
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 17 additions and 8 deletions
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2
src/libstore/build/local-derivation-goal.cc
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@ -2062,7 +2062,7 @@ void LocalDerivationGoal::runChild()
/* The tmpDir in scope points at the temporary build directory for our derivation. Some packages try different mechanisms
to find temporary directories, so we want to open up a broader place for them to dump their files, if needed. */
Path globalTmpDir = canonPath(getEnv("TMPDIR").value_or("/tmp"), true);
Path globalTmpDir = canonPath(getEnvNonEmpty("TMPDIR").value_or("/tmp"), true);
/* They don't like trailing slashes on subpath directives */
if (globalTmpDir.back() == '/') globalTmpDir.pop_back();

14
src/libstore/globals.cc
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@ -30,15 +30,15 @@ static GlobalConfig::Register rSettings(&settings);
Settings::Settings()
: nixPrefix(NIX_PREFIX)
, nixStore(canonPath(getEnv("NIX_STORE_DIR").value_or(getEnv("NIX_STORE").value_or(NIX_STORE_DIR))))
, nixDataDir(canonPath(getEnv("NIX_DATA_DIR").value_or(NIX_DATA_DIR)))
, nixLogDir(canonPath(getEnv("NIX_LOG_DIR").value_or(NIX_LOG_DIR)))
, nixStateDir(canonPath(getEnv("NIX_STATE_DIR").value_or(NIX_STATE_DIR)))
, nixConfDir(canonPath(getEnv("NIX_CONF_DIR").value_or(NIX_CONF_DIR)))
, nixStore(canonPath(getEnvNonEmpty("NIX_STORE_DIR").value_or(getEnvNonEmpty("NIX_STORE").value_or(NIX_STORE_DIR))))
, nixDataDir(canonPath(getEnvNonEmpty("NIX_DATA_DIR").value_or(NIX_DATA_DIR)))
, nixLogDir(canonPath(getEnvNonEmpty("NIX_LOG_DIR").value_or(NIX_LOG_DIR)))
, nixStateDir(canonPath(getEnvNonEmpty("NIX_STATE_DIR").value_or(NIX_STATE_DIR)))
, nixConfDir(canonPath(getEnvNonEmpty("NIX_CONF_DIR").value_or(NIX_CONF_DIR)))
, nixUserConfFiles(getUserConfigFiles())
, nixBinDir(canonPath(getEnv("NIX_BIN_DIR").value_or(NIX_BIN_DIR)))
, nixBinDir(canonPath(getEnvNonEmpty("NIX_BIN_DIR").value_or(NIX_BIN_DIR)))
, nixManDir(canonPath(NIX_MAN_DIR))
, nixDaemonSocketFile(canonPath(getEnv("NIX_DAEMON_SOCKET_PATH").value_or(nixStateDir + DEFAULT_SOCKET_PATH)))
, nixDaemonSocketFile(canonPath(getEnvNonEmpty("NIX_DAEMON_SOCKET_PATH").value_or(nixStateDir + DEFAULT_SOCKET_PATH)))
{
buildUsersGroup = getuid() == 0 ? "nixbld" : "";
lockCPU = getEnv("NIX_AFFINITY_HACK") == "1";

5
src/libutil/util.cc
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@ -54,6 +54,11 @@ std::optional<std::string> getEnv(const std::string & key)
return std::string(value);
}
std::optional<std::string> getEnvNonEmpty(const std::string & key) {
auto value = getEnv(key);
if (value == "") return {};
return value;
}
std::map<std::string, std::string> getEnv()
{

4
src/libutil/util.hh
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@ -39,6 +39,10 @@ extern const std::string nativeSystem;
/* Return an environment variable. */
std::optional<std::string> getEnv(const std::string & key);
/* Return a non empty environment variable. Returns nullopt if the env
variable is set to "" */
std::optional<std::string> getEnvNonEmpty(const std::string & key);
/* Get the entire environment. */
std::map<std::string, std::string> getEnv();