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nix: Add --expr flag

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This replaces the '(...)' installable syntax, which is not very
discoverable. The downside is that you can't have multiple expressions
or mix expressions and other installables.
This commit is contained in:
Eelco Dolstra 2019-11-27 00:05:30 +01:00
parent 2c6dbcd5e7
commit ca8caaec5e
9 changed files with 86 additions and 76 deletions
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16
tests/pure-eval.sh
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@ -2,17 +2,17 @@ source common.sh
clearStore
nix eval '(assert 1 + 2 == 3; true)'
nix eval --expr 'assert 1 + 2 == 3; true'
[[ $(nix eval --impure '(builtins.readFile ./pure-eval.sh)') =~ clearStore ]]
[[ $(nix eval --impure --expr 'builtins.readFile ./pure-eval.sh') =~ clearStore ]]
(! nix eval '(builtins.readFile ./pure-eval.sh)')
(! nix eval --expr 'builtins.readFile ./pure-eval.sh')
(! nix eval '(builtins.currentTime)')
(! nix eval '(builtins.currentSystem)')
(! nix eval --expr builtins.currentTime)
(! nix eval --expr builtins.currentSystem)
(! nix-instantiate --pure-eval ./simple.nix)
[[ $(nix eval --impure "((import (builtins.fetchurl { url = file://$(pwd)/pure-eval.nix; })).x)") == 123 ]]
(! nix eval "((import (builtins.fetchurl { url = file://$(pwd)/pure-eval.nix; })).x)")
nix eval "((import (builtins.fetchurl { url = file://$(pwd)/pure-eval.nix; sha256 = \"$(nix hash-file pure-eval.nix --type sha256)\"; })).x)"
[[ $(nix eval --impure --expr "(import (builtins.fetchurl { url = file://$(pwd)/pure-eval.nix; })).x") == 123 ]]
(! nix eval --expr "(import (builtins.fetchurl { url = file://$(pwd)/pure-eval.nix; })).x")
nix eval --expr "(import (builtins.fetchurl { url = file://$(pwd)/pure-eval.nix; sha256 = \"$(nix hash-file pure-eval.nix --type sha256)\"; })).x"