forked from lix-project/lix
dcc37c236c
immediately add the result as a permanent GC root. This is the only
way to prevent a race with the garbage collector. For instance, the
old style
ln -s $(nix-store -r $(nix-instantiate foo.nix)) \
/nix/var/nix/gcroots/result
has two time windows in which the garbage collector can interfere
(by GC'ing the derivation and the output, respectively). On the
other hand,
nix-store --add-root /nix/var/nix/gcroots/result -r \
$(nix-instantiate --add-root /nix/var/nix/gcroots/drv \
foo.nix)
is safe.
* nix-build: use `--add-root' to prevent GC races.
19 lines
497 B
Plaintext
19 lines
497 B
Plaintext
nix-instantiate [OPTIONS...] [FILES...]
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`nix-instantiate' turns Nix expressions into store derivations.
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The argument `-' may be specified to read a Nix expression from
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standard input.
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Options:
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--version: output version information
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--help: display help
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--verbose / -v: verbose operation (may be repeated)
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--eval-only: evaluate and print resulting term; do not instantiate
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--parse-only: parse and print abstract syntax tree
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--add-root: add garbage collector roots for the result
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