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fix: Treat empty TMPDIR as unset

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Fixes an instance of

    nix: src/libutil/util.cc:139: nix::Path nix::canonPath(PathView, bool): Assertion `path != ""' failed.

... which I've been getting in one of my shells for some reason.
I have yet to find out why TMPDIR was empty, but it's no reason for
Nix to break.

(cherry picked from commit c3fb2aa1f9)
This commit is contained in:
Robert Hensing 2024-03-22 22:41:50 +01:00
parent 8e75ad1995
commit 1a336bf865
4 changed files with 25 additions and 4 deletions
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2
src/nix-build/nix-build.cc
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@ -458,7 +458,7 @@ static void main_nix_build(int argc, char * * argv)
auto env = getEnv();
auto tmp = getEnv("TMPDIR");
if (!tmp) tmp = getEnv("XDG_RUNTIME_DIR").value_or("/tmp");
if (!tmp || tmp->empty()) tmp = getEnv("XDG_RUNTIME_DIR").value_or("/tmp");
if (pure) {
decltype(env) newEnv;