diff options
| -rw-r--r-- | src/libstore/build.cc | 113 | ||||
| -rw-r--r-- | src/libstore/derivations.cc | 14 | ||||
| -rw-r--r-- | src/libstore/derivations.hh | 4 | ||||
| -rw-r--r-- | src/libstore/parsed-derivations.cc | 97 | ||||
| -rw-r--r-- | src/libstore/parsed-derivations.hh | 33 |
5 files changed, 145 insertions, 116 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc index 69c3c2c1e..eb7f106a2 100644 --- a/src/libstore/build.cc +++ b/src/libstore/build.cc @@ -11,6 +11,7 @@ #include "compression.hh" #include "json.hh" #include "nar-info.hh" +#include "parsed-derivations.hh" #include <algorithm> #include <iostream> @@ -740,8 +741,7 @@ private: /* The derivation stored at drvPath. */ std::unique_ptr<BasicDerivation> drv; - /* The contents of drv->env["__json"]. */ - std::experimental::optional<nlohmann::json> structuredAttrs; + std::unique_ptr<ParsedDerivation> parsedDrv; /* The remainder is state held during the build. */ @@ -923,13 +923,6 @@ private: /* Fill in the environment for the builder. */ void initEnv(); - /* Get an attribute from drv->env or from drv->env["__json"]. */ - std::experimental::optional<std::string> getAttr(const std::string & name); - - bool getBoolAttr(const std::string & name, bool def = false); - - std::experimental::optional<Strings> getStringsAttr(const std::string & name); - /* Write a JSON file containing the derivation attributes. */ void writeStructuredAttrs(); @@ -1149,15 +1142,7 @@ void DerivationGoal::haveDerivation() return; } - /* Parse the __json attribute, if any. */ - auto jsonAttr = drv->env.find("__json"); - if (jsonAttr != drv->env.end()) { - try { - structuredAttrs = nlohmann::json::parse(jsonAttr->second); - } catch (std::exception & e) { - throw Error("cannot process __json attribute of '%s': %s", drvPath, e.what()); - } - } + parsedDrv = std::make_unique<ParsedDerivation>(drvPath, *drv); /* We are first going to try to create the invalid output paths through substitutes. If that doesn't work, we'll build @@ -1415,7 +1400,7 @@ void DerivationGoal::tryToBuild() /* Don't do a remote build if the derivation has the attribute `preferLocalBuild' set. Also, check and repair modes are only supported for local builds. */ - bool buildLocally = buildMode != bmNormal || drv->willBuildLocally(); + bool buildLocally = buildMode != bmNormal || parsedDrv->willBuildLocally(); auto started = [&]() { auto msg = fmt( @@ -1664,7 +1649,7 @@ HookReply DerivationGoal::tryBuildHook() /* Tell the hook about system features (beyond the system type) required from the build machine. (The hook could parse the drv file itself, but this is easier.) */ - auto features = getStringsAttr("requiredSystemFeatures").value_or(Strings()); + auto features = parsedDrv->getStringsAttr("requiredSystemFeatures").value_or(Strings()); /* Send the request to the hook. */ worker.hook->sink @@ -1812,7 +1797,7 @@ static void preloadNSS() { void DerivationGoal::startBuilder() { /* Right platform? */ - if (!drv->canBuildLocally()) { + if (!parsedDrv->canBuildLocally()) { throw Error( format("a '%1%' is required to build '%3%', but I am a '%2%'") % drv->platform % settings.thisSystem % drvPath); @@ -1822,12 +1807,12 @@ void DerivationGoal::startBuilder() preloadNSS(); #if __APPLE__ - additionalSandboxProfile = getAttr("__sandboxProfile").value_or(""); + additionalSandboxProfile = parsedDrv->getStringAttr("__sandboxProfile").value_or(""); #endif /* Are we doing a chroot build? */ { - auto noChroot = getBoolAttr("__noChroot"); + auto noChroot = parsedDrv->getBoolAttr("__noChroot"); if (settings.sandboxMode == smEnabled) { if (noChroot) throw Error(format("derivation '%1%' has '__noChroot' set, " @@ -1893,7 +1878,7 @@ void DerivationGoal::startBuilder() writeStructuredAttrs(); /* Handle exportReferencesGraph(), if set. */ - if (!structuredAttrs) { + if (!parsedDrv->getStructuredAttrs()) { /* The `exportReferencesGraph' feature allows the references graph to be passed to a builder. This attribute should be a list of pairs [name1 path1 name2 path2 ...]. The references graph of @@ -1958,7 +1943,7 @@ void DerivationGoal::startBuilder() PathSet allowedPaths = settings.allowedImpureHostPrefixes; /* This works like the above, except on a per-derivation level */ - auto impurePaths = getStringsAttr("__impureHostDeps").value_or(Strings()); + auto impurePaths = parsedDrv->getStringsAttr("__impureHostDeps").value_or(Strings()); for (auto & i : impurePaths) { bool found = false; @@ -2326,7 +2311,7 @@ void DerivationGoal::initEnv() passAsFile is ignored in structure mode because it's not needed (attributes are not passed through the environment, so there is no size constraint). */ - if (!structuredAttrs) { + if (!parsedDrv->getStructuredAttrs()) { StringSet passAsFile = tokenizeString<StringSet>(get(drv->env, "passAsFile")); int fileNr = 0; @@ -2373,7 +2358,7 @@ void DerivationGoal::initEnv() fixed-output derivations is by definition pure (since we already know the cryptographic hash of the output). */ if (fixedOutput) { - for (auto & i : getStringsAttr("impureEnvVars").value_or(Strings())) + for (auto & i : parsedDrv->getStringsAttr("impureEnvVars").value_or(Strings())) env[i] = getEnv(i); } @@ -2384,80 +2369,12 @@ void DerivationGoal::initEnv() } -std::experimental::optional<std::string> DerivationGoal::getAttr(const std::string & name) -{ - if (structuredAttrs) { - auto i = structuredAttrs->find(name); - if (i == structuredAttrs->end()) - return {}; - else { - if (!i->is_string()) - throw Error("attribute '%s' of derivation '%s' must be a string", name, drvPath); - return i->get<std::string>(); - } - } else { - auto i = drv->env.find(name); - if (i == drv->env.end()) - return {}; - else - return i->second; - } -} - - -bool DerivationGoal::getBoolAttr(const std::string & name, bool def) -{ - if (structuredAttrs) { - auto i = structuredAttrs->find(name); - if (i == structuredAttrs->end()) - return def; - else { - if (!i->is_boolean()) - throw Error("attribute '%s' of derivation '%s' must be a Boolean", name, drvPath); - return i->get<bool>(); - } - } else { - auto i = drv->env.find(name); - if (i == drv->env.end()) - return def; - else - return i->second == "1"; - } -} - - -std::experimental::optional<Strings> DerivationGoal::getStringsAttr(const std::string & name) -{ - if (structuredAttrs) { - auto i = structuredAttrs->find(name); - if (i == structuredAttrs->end()) - return {}; - else { - if (!i->is_array()) - throw Error("attribute '%s' of derivation '%s' must be a list of strings", name, drvPath); - Strings res; - for (auto j = i->begin(); j != i->end(); ++j) { - if (!j->is_string()) - throw Error("attribute '%s' of derivation '%s' must be a list of strings", name, drvPath); - res.push_back(j->get<std::string>()); - } - return res; - } - } else { - auto i = drv->env.find(name); - if (i == drv->env.end()) - return {}; - else - return tokenizeString<Strings>(i->second); - } -} - - static std::regex shVarName("[A-Za-z_][A-Za-z0-9_]*"); void DerivationGoal::writeStructuredAttrs() { + auto & structuredAttrs = parsedDrv->getStructuredAttrs(); if (!structuredAttrs) return; auto json = *structuredAttrs; @@ -2997,7 +2914,7 @@ void DerivationGoal::runChild() writeFile(sandboxFile, sandboxProfile); - bool allowLocalNetworking = getBoolAttr("__darwinAllowLocalNetworking"); + bool allowLocalNetworking = parsedDrv->getBoolAttr("__darwinAllowLocalNetworking"); /* The tmpDir in scope points at the temporary build directory for our derivation. Some packages try different mechanisms to find temporary directories, so we want to open up a broader place for them to dump their files, if needed. */ @@ -3283,7 +3200,7 @@ void DerivationGoal::registerOutputs() /* Enforce `allowedReferences' and friends. */ auto checkRefs = [&](const string & attrName, bool allowed, bool recursive) { - auto value = getStringsAttr(attrName); + auto value = parsedDrv->getStringsAttr(attrName); if (!value) return; PathSet spec = parseReferenceSpecifiers(worker.store, *drv, *value); diff --git a/src/libstore/derivations.cc b/src/libstore/derivations.cc index 1e187ec5e..3961126ff 100644 --- a/src/libstore/derivations.cc +++ b/src/libstore/derivations.cc @@ -36,12 +36,6 @@ Path BasicDerivation::findOutput(const string & id) const } -bool BasicDerivation::willBuildLocally() const -{ - return get(env, "preferLocalBuild") == "1" && canBuildLocally(); -} - - bool BasicDerivation::substitutesAllowed() const { return get(env, "allowSubstitutes", "1") == "1"; @@ -54,14 +48,6 @@ bool BasicDerivation::isBuiltin() const } -bool BasicDerivation::canBuildLocally() const -{ - return platform == settings.thisSystem - || settings.extraPlatforms.get().count(platform) > 0 - || isBuiltin(); -} - - Path writeDerivation(ref<Store> store, const Derivation & drv, const string & name, RepairFlag repair) { diff --git a/src/libstore/derivations.hh b/src/libstore/derivations.hh index 7b97730d3..9753e796d 100644 --- a/src/libstore/derivations.hh +++ b/src/libstore/derivations.hh @@ -56,14 +56,10 @@ struct BasicDerivation the given derivation. */ Path findOutput(const string & id) const; - bool willBuildLocally() const; - bool substitutesAllowed() const; bool isBuiltin() const; - bool canBuildLocally() const; - /* Return true iff this is a fixed-output derivation. */ bool isFixedOutput() const; diff --git a/src/libstore/parsed-derivations.cc b/src/libstore/parsed-derivations.cc new file mode 100644 index 000000000..0d7acf046 --- /dev/null +++ b/src/libstore/parsed-derivations.cc @@ -0,0 +1,97 @@ +#include "parsed-derivations.hh" + +namespace nix { + +ParsedDerivation::ParsedDerivation(const Path & drvPath, BasicDerivation & drv) + : drvPath(drvPath), drv(drv) +{ + /* Parse the __json attribute, if any. */ + auto jsonAttr = drv.env.find("__json"); + if (jsonAttr != drv.env.end()) { + try { + structuredAttrs = nlohmann::json::parse(jsonAttr->second); + } catch (std::exception & e) { + throw Error("cannot process __json attribute of '%s': %s", drvPath, e.what()); + } + } +} + +std::experimental::optional<std::string> ParsedDerivation::getStringAttr(const std::string & name) const +{ + if (structuredAttrs) { + auto i = structuredAttrs->find(name); + if (i == structuredAttrs->end()) + return {}; + else { + if (!i->is_string()) + throw Error("attribute '%s' of derivation '%s' must be a string", name, drvPath); + return i->get<std::string>(); + } + } else { + auto i = drv.env.find(name); + if (i == drv.env.end()) + return {}; + else + return i->second; + } +} + +bool ParsedDerivation::getBoolAttr(const std::string & name, bool def) const +{ + if (structuredAttrs) { + auto i = structuredAttrs->find(name); + if (i == structuredAttrs->end()) + return def; + else { + if (!i->is_boolean()) + throw Error("attribute '%s' of derivation '%s' must be a Boolean", name, drvPath); + return i->get<bool>(); + } + } else { + auto i = drv.env.find(name); + if (i == drv.env.end()) + return def; + else + return i->second == "1"; + } +} + +std::experimental::optional<Strings> ParsedDerivation::getStringsAttr(const std::string & name) const +{ + if (structuredAttrs) { + auto i = structuredAttrs->find(name); + if (i == structuredAttrs->end()) + return {}; + else { + if (!i->is_array()) + throw Error("attribute '%s' of derivation '%s' must be a list of strings", name, drvPath); + Strings res; + for (auto j = i->begin(); j != i->end(); ++j) { + if (!j->is_string()) + throw Error("attribute '%s' of derivation '%s' must be a list of strings", name, drvPath); + res.push_back(j->get<std::string>()); + } + return res; + } + } else { + auto i = drv.env.find(name); + if (i == drv.env.end()) + return {}; + else + return tokenizeString<Strings>(i->second); + } +} + +bool ParsedDerivation::canBuildLocally() const +{ + return drv.platform == settings.thisSystem + || settings.extraPlatforms.get().count(drv.platform) > 0 + || drv.isBuiltin(); +} + +bool ParsedDerivation::willBuildLocally() const +{ + return getBoolAttr("preferLocalBuild") && canBuildLocally(); +} + +} diff --git a/src/libstore/parsed-derivations.hh b/src/libstore/parsed-derivations.hh new file mode 100644 index 000000000..0c7dc32e1 --- /dev/null +++ b/src/libstore/parsed-derivations.hh @@ -0,0 +1,33 @@ +#include "derivations.hh" + +#include <nlohmann/json.hpp> + +namespace nix { + +class ParsedDerivation +{ + Path drvPath; + BasicDerivation & drv; + std::experimental::optional<nlohmann::json> structuredAttrs; + +public: + + ParsedDerivation(const Path & drvPath, BasicDerivation & drv); + + const std::experimental::optional<nlohmann::json> & getStructuredAttrs() const + { + return structuredAttrs; + } + + std::experimental::optional<std::string> getStringAttr(const std::string & name) const; + + bool getBoolAttr(const std::string & name, bool def = false) const; + + std::experimental::optional<Strings> getStringsAttr(const std::string & name) const; + + bool canBuildLocally() const; + + bool willBuildLocally() const; +}; + +} |