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

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
View File

@ -31,20 +31,26 @@
<arg><option>--command</option> <replaceable>cmd</replaceable></arg>
<arg><option>--exclude</option> <replaceable>regexp</replaceable></arg>
<arg><option>--pure</option></arg>
<arg choice='plain' rep='repeat'><replaceable>paths</replaceable></arg>
<arg><replaceable>path</replaceable></arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsection><title>Description</title>
<para>The command <command>nix-shell</command> will build
the dependencies of the specified derivation, but not the derivation
<para>The command <command>nix-shell</command> will build the
dependencies of the specified derivation, but not the derivation
itself. It will then start an interactive shell in which all
environment variables defined by the derivation have been set to their
corresponding values, and the script <literal>$stdenv/setup</literal>
has been sourced. This is useful for reproducing the environment of a
environment variables defined by the derivation
<replaceable>path</replaceable> have been set to their corresponding
values, and the script <literal>$stdenv/setup</literal> has been
sourced. This is useful for reproducing the environment of a
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>

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;