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Remove the --delete option for --gc

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Running `nix-store --gc --delete` will, as of Nix 2.3.3, simply fail
because the --delete option conflicts with the --delete operation.

  $ nix-store --gc --delete
  error: only one operation may be specified
  Try 'nix-store --help' for more information.

Furthermore, it has been broken since at least Nix 0.16 (which was
released sometime in 2010), which means that any scripts which depend
on it should have been broken at least nine years ago. This commit
simply formally removes the option. There should be no actual difference
in behaviour as far as the user is concerned: it errors with the exact
same error message. The manual has been edited to remove any references
to the (now gone) --delete option.

Other information:
* Path for Nix 0.16 used:
  /nix/store/rp3sgmskn0p0pj1ia2qwd5al6f6pinz4-nix-0.16
This commit is contained in:
jakobrs 2020-03-19 19:15:55 +01:00
parent ef74fafc03
commit c5a488afc0
2 changed files with 4 additions and 14 deletions
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17
doc/manual/command-ref/nix-store.xml
View file

@ -360,7 +360,6 @@ EOF
<arg choice='plain'><option>--print-roots</option></arg>
<arg choice='plain'><option>--print-live</option></arg>
<arg choice='plain'><option>--print-dead</option></arg>
<arg choice='plain'><option>--delete</option></arg>
</group>
<arg><option>--max-freed</option> <replaceable>bytes</replaceable></arg>
</cmdsynopsis>
@ -407,14 +406,6 @@ the Nix store not reachable via file system references from a set of
</varlistentry>
<varlistentry><term><option>--delete</option></term>
<listitem><para>This operation performs an actual garbage
collection. All dead paths are removed from the
store. This is the default.</para></listitem>
</varlistentry>
</variablelist>
<para>By default, all unreachable paths are deleted. The following
@ -444,10 +435,10 @@ and <link
linkend="conf-keep-derivations"><literal>keep-derivations</literal></link>
variables in the Nix configuration file.</para>
<para>With <option>--delete</option>, the collector prints the total
number of freed bytes when it finishes (or when it is interrupted).
With <option>--print-dead</option>, it prints the number of bytes that
would be freed.</para>
<para>By default, the collector prints the total number of freed bytes
when it finishes (or when it is interrupted). With
<option>--print-dead</option>, it prints the number of bytes that would
be freed.</para>
</refsection>

1
src/nix-store/nix-store.cc
View file

@ -577,7 +577,6 @@ static void opGC(Strings opFlags, Strings opArgs)
if (*i == "--print-roots") printRoots = true;
else if (*i == "--print-live") options.action = GCOptions::gcReturnLive;
else if (*i == "--print-dead") options.action = GCOptions::gcReturnDead;
else if (*i == "--delete") options.action = GCOptions::gcDeleteDead;
else if (*i == "--max-freed") {
long long maxFreed = getIntArg<long long>(*i, i, opFlags.end(), true);
options.maxFreed = maxFreed >= 0 ? maxFreed : 0;