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Add a --repair flag to ‘nix-store -r’ to repair derivation outputs

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With this flag, if any valid derivation output is missing or corrupt,
it will be recreated by using a substitute if available, or by
rebuilding the derivation.  The latter may use hash rewriting if
chroots are not available.
This commit is contained in:
Eelco Dolstra 2012-10-02 17:13:46 -04:00
parent cf46f19444
commit 2001895f3d
7 changed files with 116 additions and 64 deletions
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4
src/nix-store/nix-store.cc
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@ -93,9 +93,11 @@ static PathSet realisePath(const Path & path, bool build = true)
static void opRealise(Strings opFlags, Strings opArgs)
{
bool dryRun = false;
bool repair = false;
foreach (Strings::iterator, i, opFlags)
if (*i == "--dry-run") dryRun = true;
else if (*i == "--repair") repair = true;
else throw UsageError(format("unknown flag `%1%'") % *i);
foreach (Strings::iterator, i, opArgs)
@ -107,7 +109,7 @@ static void opRealise(Strings opFlags, Strings opArgs)
/* Build all paths at the same time to exploit parallelism. */
PathSet paths(opArgs.begin(), opArgs.end());
store->buildPaths(paths);
store->buildPaths(paths, repair);
foreach (Paths::iterator, i, opArgs) {
PathSet paths = realisePath(*i, false);