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Merge pull request #2433 from grahamc/doc-shebang-quotes

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Document that nix-shell's shebang requires double quotes for expressions
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Eelco Dolstra 2018-09-19 20:08:45 +02:00 committed by GitHub
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doc/manual/command-ref/nix-shell.xml
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@ -317,13 +317,28 @@ while (my $token = $p->get_tag("a")) {
</para>
<para>Finally, the following Haskell script uses a specific branch of
Nixpkgs/NixOS (the 14.12 stable branch):
<para>Sometimes you need to pass a simple Nix expression to customize
a package like Terraform:
<programlisting><![CDATA[
#! /usr/bin/env nix-shell
#! nix-shell -i bash -p "terraform.withPlugins (plugins: [ plugins.openstack ])"
terraform apply
]]></programlisting>
<note><para>You must use double quotes (<literal>"</literal>) when
passing a simple Nix expression in a nix-shell shebang.</para></note>
</para>
<para>Finally, using the merging of multiple nix-shell shebangs the
following Haskell script uses a specific branch of Nixpkgs/NixOS (the
18.03 stable branch):
<programlisting><![CDATA[
#! /usr/bin/env nix-shell
#! nix-shell -i runghc -p haskellPackages.ghc haskellPackages.HTTP haskellPackages.tagsoup
#! nix-shell -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-14.12.tar.gz
#! nix-shell -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-18.03.tar.gz
import Network.HTTP
import Text.HTML.TagSoup