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* Make nix-env --dry-run print the paths to be substituted correctly

Browse source 
again.  (After the previous substituter mechanism refactoring I
  didn't update the code that obtains the references of substitutable
  paths.)  This required some refactoring: the substituter programs
  are now kept running and receive/respond to info requests via
  stdin/stdout.
This commit is contained in:
Eelco Dolstra 2008-08-02 12:54:35 +00:00
parent fc691e1cbd
commit 3c92ea399d
14 changed files with 338 additions and 272 deletions
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23
src/libstore/local-store.hh
View file

@ -3,6 +3,8 @@
#include <string>
#include <ext/stdio_filebuf.h>
#include "store-api.hh"
#include "util.hh"
@ -34,11 +36,26 @@ struct OptimiseStats
};
typedef __gnu_cxx::stdio_filebuf<char> stdio_filebuf;
struct RunningSubstituter
{
Pid pid;
boost::shared_ptr<stdio_filebuf> toBuf, fromBuf;
boost::shared_ptr<std::ostream> to;
boost::shared_ptr<std::istream> from;
};
class LocalStore : public StoreAPI
{
private:
bool substitutablePathsLoaded;
PathSet substitutablePaths;
typedef std::map<Path, RunningSubstituter> RunningSubstituters;
RunningSubstituters runningSubstituters;
public:
@ -65,6 +82,9 @@ public:
PathSet querySubstitutablePaths();
bool hasSubstitutes(const Path & path);
bool querySubstitutablePathInfo(const Path & path,
SubstitutablePathInfo & info);
Path addToStore(const Path & srcPath, bool fixed = false,
bool recursive = false, string hashAlgo = "",
@ -147,6 +167,9 @@ private:
void tryToDelete(const GCOptions & options, GCResults & results,
const PathSet & livePaths, const PathSet & tempRootsClosed, PathSet & done,
const Path & path);
void startSubstituter(const Path & substituter,
RunningSubstituter & runningSubstituter);
};