451dbf687f
attribute) about installed packages in user environments. Thus, an operation like `nix-env -q --description' shows useful information not only on available packages but also on installed packages. * nix-env now passes the entire manifest as an argument to the Nix expression of the user environment builder (not just a list of paths), so that in particular the user environment builder has access to the meta attributes. * New operation `--set-flag' in nix-env to change meta info of installed packages. This will be useful to pass per-package policies to the user environment builder (e.g., how to resolve collision or whether to disable a package (NIX-80)) or upgrade policies in nix-env (e.g., that a package should be "masked", that is, left untouched by upgrade actions). Example: $ nix-env --set-flag enabled false ghc-6.4
67 lines
1.3 KiB
C++
67 lines
1.3 KiB
C++
#ifndef __GET_DRVS_H
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#define __GET_DRVS_H
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#include <string>
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#include <map>
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#include <boost/shared_ptr.hpp>
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#include "eval.hh"
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namespace nix {
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typedef std::map<string, string> MetaInfo;
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struct DrvInfo
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{
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private:
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string drvPath;
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string outPath;
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public:
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string name;
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string attrPath; /* path towards the derivation */
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string system;
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/* !!! these should really be hidden, and setMetaInfo() should
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make a copy since the ATermMap can be shared between multiple
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DrvInfos. */
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boost::shared_ptr<ATermMap> attrs;
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string queryDrvPath(EvalState & state) const;
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string queryOutPath(EvalState & state) const;
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MetaInfo queryMetaInfo(EvalState & state) const;
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void setDrvPath(const string & s)
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{
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drvPath = s;
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}
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void setOutPath(const string & s)
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{
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outPath = s;
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}
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void setMetaInfo(const MetaInfo & meta);
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};
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typedef list<DrvInfo> DrvInfos;
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/* Evaluate expression `e'. If it evaluates to a derivation, store
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information about the derivation in `drv' and return true.
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Otherwise, return false. */
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bool getDerivation(EvalState & state, Expr e, DrvInfo & drv);
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void getDerivations(EvalState & state, Expr e, const string & pathPrefix,
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const ATermMap & autoArgs, DrvInfos & drvs);
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}
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#endif /* !__GET_DRVS_H */
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