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nix-shell: Use shell.nix as the default expression if it exists

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This commit is contained in:
Eelco Dolstra 2014-02-10 10:25:13 +01:00
parent 84a8b5e9af
commit b632153ebd
2 changed files with 14 additions and 7 deletions
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18
doc/manual/nix-shell.xml
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@ -31,20 +31,26 @@
<arg><option>--command</option> <replaceable>cmd</replaceable></arg> <arg><option>--command</option> <replaceable>cmd</replaceable></arg>
<arg><option>--exclude</option> <replaceable>regexp</replaceable></arg> <arg><option>--exclude</option> <replaceable>regexp</replaceable></arg>
<arg><option>--pure</option></arg> <arg><option>--pure</option></arg>
<arg choice='plain' rep='repeat'><replaceable>paths</replaceable></arg> <arg><replaceable>path</replaceable></arg>
</cmdsynopsis> </cmdsynopsis>
</refsynopsisdiv> </refsynopsisdiv>
<refsection><title>Description</title> <refsection><title>Description</title>
<para>The command <command>nix-shell</command> will build <para>The command <command>nix-shell</command> will build the
the dependencies of the specified derivation, but not the derivation dependencies of the specified derivation, but not the derivation
itself. It will then start an interactive shell in which all itself. It will then start an interactive shell in which all
environment variables defined by the derivation have been set to their environment variables defined by the derivation
corresponding values, and the script <literal>$stdenv/setup</literal> <replaceable>path</replaceable> have been set to their corresponding
has been sourced. This is useful for reproducing the environment of a values, and the script <literal>$stdenv/setup</literal> has been
sourced. This is useful for reproducing the environment of a
derivation for development.</para> derivation for development.</para>
<para>If <replaceable>path</replaceable> is not given,
<command>nix-shell</command> defaults to
<filename>shell.nix</filename> if it exists, and
<filename>default.nix</filename> otherwise.</para>
</refsection> </refsection>

3
scripts/nix-build.in
View file

@ -149,7 +149,8 @@ for (my $n = 0; $n < scalar @ARGV; $n++) {
} }
} }
@exprs = ("./default.nix") if scalar @exprs == 0; @exprs = ("shell.nix") if scalar @exprs == 0 && $runEnv && -e "shell.nix";
@exprs = ("default.nix") if scalar @exprs == 0;
$ENV{'IN_NIX_SHELL'} = 1 if $runEnv; $ENV{'IN_NIX_SHELL'} = 1 if $runEnv;