* `nix-store --gc --print-dead': print the total size of the store
objects that would be freed.
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					 2 changed files with 19 additions and 5 deletions
				
			
		|  | @ -492,13 +492,17 @@ static void opCheckValidity(Strings opFlags, Strings opArgs) | |||
| 
 | ||||
| struct PrintFreed  | ||||
| { | ||||
|     bool show; | ||||
|     bool show, dryRun; | ||||
|     unsigned long long bytesFreed; | ||||
|     PrintFreed(bool _show) : bytesFreed(0), show(_show) { } | ||||
|     PrintFreed(bool show, bool dryRun) | ||||
|         : bytesFreed(0), show(show), dryRun(dryRun) { } | ||||
|     ~PrintFreed()  | ||||
|     { | ||||
|         if (show) | ||||
|             cout << format("%d bytes freed (%.2f MiB)\n") | ||||
|             cout << format( | ||||
|                 (dryRun | ||||
|                     ? "%d bytes would be freed (%.2f MiB)\n" | ||||
|                     : "%d bytes freed (%.2f MiB)\n")) | ||||
|                 % bytesFreed % (bytesFreed / (1024.0 * 1024.0)); | ||||
|     } | ||||
| }; | ||||
|  | @ -518,7 +522,8 @@ static void opGC(Strings opFlags, Strings opArgs) | |||
|         else throw UsageError(format("bad sub-operation `%1%' in GC") % *i); | ||||
| 
 | ||||
|     PathSet result; | ||||
|     PrintFreed freed(action == gcDeleteDead); | ||||
|     PrintFreed freed(action == gcDeleteDead || action == gcReturnDead, | ||||
|         action == gcReturnDead); | ||||
|     collectGarbage(action, PathSet(), false, result, freed.bytesFreed); | ||||
| 
 | ||||
|     if (action != gcDeleteDead) { | ||||
|  | @ -546,7 +551,7 @@ static void opDelete(Strings opFlags, Strings opArgs) | |||
|         pathsToDelete.insert(fixPath(*i)); | ||||
|      | ||||
|     PathSet dummy; | ||||
|     PrintFreed freed(true); | ||||
|     PrintFreed freed(true, false); | ||||
|     collectGarbage(gcDeleteSpecific, pathsToDelete, ignoreLiveness, | ||||
|         dummy, freed.bytesFreed); | ||||
| } | ||||
|  |  | |||
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