nordic-dev.net/nix
nordic-dev.net/nix
2
0
Fork 0
mirror of https://github.com/NixOS/nix.git synced 2024-11-21 22:32:26 +00:00
Code Issues Packages Projects Releases Wiki Activity

Treat empty env var paths as unset

Browse Source 
We make sure the env var paths are actually set (ie. not "") before
sending them to the canonicalization function. If we forget to do so,
the user will end up facing a puzzled failed assertion internal error.

We issue a non-failing warning as a stop-gap measure. We could want to
revisit this to issue a detailed failing error message in the future.
This commit is contained in:
Félix Baylac Jacqué 2023-03-01 20:01:36 +01:00 committed by zimbatm
parent 4489def1b3
commit 25300c0ecd
No known key found for this signature in database
GPG Key ID: 71BAF6D40C1D63D7
4 changed files with 24 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/libstore/build/local-derivation-goal.cc
View File

@ -2063,7 +2063,7 @@ 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
View File

@ -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";

12
src/libutil/util.cc
View File

@ -54,6 +54,18 @@ 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 == "") {
// TODO: determine whether this should be a warning or an error.
logWarning({
.msg = hintfmt("ignoring the '%1%' env variable, its value has been set to \"\"", key)
});
return std::nullopt;
} else {
return value;
}
}
std::map<std::string, std::string> getEnv()
{

4
src/libutil/util.hh
View File

@ -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();