nix-instantiate: Add a --no-readonly-mode flag
This allows running nix-instantiate --eval-only without performing the evaluation in readonly mode, letting features like import from derivation and automatic substitution of builtins.storePath paths work. Signed-off-by: Shea Levy <shea@shealevy.com>
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@ -35,6 +35,7 @@
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<arg choice='plain'>
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<arg choice='plain'>
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<option>--eval-only</option>
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<option>--eval-only</option>
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<arg><option>--strict</option></arg>
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<arg><option>--strict</option></arg>
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<arg><option>--no-readonly-mode</option></arg>
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</arg>
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</arg>
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<arg choice='plain'><option>--find-file</option></arg>
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<arg choice='plain'><option>--find-file</option></arg>
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</group>
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</group>
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@ -140,6 +141,17 @@ policies.</para>
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</varlistentry>
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</varlistentry>
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<varlistentry><term><option>--no-readonly-mode</option></term>
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<listitem><para>When used with <option>--eval-only</option>,
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perform evaluation in read/write mode so nix language features
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that require it will still work (at the cost of needing to do
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instantiation of every evaluated derivation).</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</variablelist>
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<variablelist condition="manpage">
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<variablelist condition="manpage">
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@ -107,6 +107,9 @@ void run(Strings args)
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settings.readOnlyMode = true;
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settings.readOnlyMode = true;
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evalOnly = true;
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evalOnly = true;
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}
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}
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else if (arg == "--no-readonly-mode") {
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settings.readOnlyMode = false;
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}
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else if (arg == "--parse-only") {
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else if (arg == "--parse-only") {
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settings.readOnlyMode = true;
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settings.readOnlyMode = true;
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parseOnly = evalOnly = true;
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parseOnly = evalOnly = true;
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