diff options
Diffstat (limited to 'src/libstore/build.cc')
| -rw-r--r-- | src/libstore/build.cc | 269 |
1 files changed, 175 insertions, 94 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc index 1402bd097c35..727b8b3444ab 100644 --- a/src/libstore/build.cc +++ b/src/libstore/build.cc @@ -740,6 +740,9 @@ private: /* The derivation stored at drvPath. */ std::unique_ptr<BasicDerivation> drv; + /* The contents of drv->env["__json"]. */ + std::experimental::optional<nlohmann::json> structuredAttrs; + /* The remainder is state held during the build. */ /* Locks on the output paths. */ @@ -920,6 +923,13 @@ 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(); @@ -1139,6 +1149,16 @@ 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()); + } + } + /* We are first going to try to create the invalid output paths through substitutes. If that doesn't work, we'll build them. */ @@ -1644,7 +1664,7 @@ 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.) */ - Strings features = tokenizeString<Strings>(get(drv->env, "requiredSystemFeatures")); + auto features = getStringsAttr("requiredSystemFeatures").value_or(Strings()); for (auto & i : features) checkStoreName(i); /* !!! abuse */ /* Send the request to the hook. */ @@ -1803,13 +1823,14 @@ void DerivationGoal::startBuilder() preloadNSS(); #if __APPLE__ - additionalSandboxProfile = get(drv->env, "__sandboxProfile"); + additionalSandboxProfile = getAttr("__sandboxProfile").value_or(""); #endif /* Are we doing a chroot build? */ { + auto noChroot = getBoolAttr("__noChroot"); if (settings.sandboxMode == smEnabled) { - if (get(drv->env, "__noChroot") == "1") + if (noChroot) throw Error(format("derivation '%1%' has '__noChroot' set, " "but that's not allowed when 'sandbox' is 'true'") % drvPath); #if __APPLE__ @@ -1822,7 +1843,7 @@ void DerivationGoal::startBuilder() else if (settings.sandboxMode == smDisabled) useChroot = false; else if (settings.sandboxMode == smRelaxed) - useChroot = !fixedOutput && get(drv->env, "__noChroot") != "1"; + useChroot = !fixedOutput && !noChroot; } if (worker.store.storeDir != worker.store.realStoreDir) { @@ -1873,7 +1894,7 @@ void DerivationGoal::startBuilder() writeStructuredAttrs(); /* Handle exportReferencesGraph(), if set. */ - if (!drv->env.count("__json")) { + if (!structuredAttrs) { /* 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 @@ -1938,7 +1959,7 @@ void DerivationGoal::startBuilder() PathSet allowedPaths = settings.allowedImpureHostPrefixes; /* This works like the above, except on a per-derivation level */ - Strings impurePaths = tokenizeString<Strings>(get(drv->env, "__impureHostDeps")); + auto impurePaths = getStringsAttr("__impureHostDeps").value_or(Strings()); for (auto & i : impurePaths) { bool found = false; @@ -2306,7 +2327,7 @@ 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 (!drv->env.count("__json")) { + if (!structuredAttrs) { StringSet passAsFile = tokenizeString<StringSet>(get(drv->env, "passAsFile")); int fileNr = 0; @@ -2353,8 +2374,8 @@ void DerivationGoal::initEnv() fixed-output derivations is by definition pure (since we already know the cryptographic hash of the output). */ if (fixedOutput) { - Strings varNames = tokenizeString<Strings>(get(drv->env, "impureEnvVars")); - for (auto & i : varNames) env[i] = getEnv(i); + for (auto & i : getStringsAttr("impureEnvVars").value_or(Strings())) + env[i] = getEnv(i); } /* Currently structured log messages piggyback on stderr, but we @@ -2364,116 +2385,176 @@ void DerivationGoal::initEnv() } -static std::regex shVarName("[A-Za-z_][A-Za-z0-9_]*"); - - -void DerivationGoal::writeStructuredAttrs() +std::experimental::optional<std::string> DerivationGoal::getAttr(const std::string & name) { - auto jsonAttr = drv->env.find("__json"); - if (jsonAttr == drv->env.end()) return; + 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; + } +} - try { - auto jsonStr = rewriteStrings(jsonAttr->second, inputRewrites); +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"; + } +} - auto json = nlohmann::json::parse(jsonStr); - /* Add an "outputs" object containing the output paths. */ - nlohmann::json outputs; - for (auto & i : drv->outputs) - outputs[i.first] = rewriteStrings(i.second.path, inputRewrites); - json["outputs"] = outputs; - - /* Handle exportReferencesGraph. */ - auto e = json.find("exportReferencesGraph"); - if (e != json.end() && e->is_object()) { - for (auto i = e->begin(); i != e->end(); ++i) { - std::ostringstream str; - { - JSONPlaceholder jsonRoot(str, true); - PathSet storePaths; - for (auto & p : *i) - storePaths.insert(p.get<std::string>()); - worker.store.pathInfoToJSON(jsonRoot, - exportReferences(storePaths), false, true); - } - json[i.key()] = nlohmann::json::parse(str.str()); // urgh +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_]*"); - writeFile(tmpDir + "/.attrs.json", json.dump()); - /* As a convenience to bash scripts, write a shell file that - maps all attributes that are representable in bash - - namely, strings, integers, nulls, Booleans, and arrays and - objects consisting entirely of those values. (So nested - arrays or objects are not supported.) */ +void DerivationGoal::writeStructuredAttrs() +{ + if (!structuredAttrs) return; - auto handleSimpleType = [](const nlohmann::json & value) -> std::experimental::optional<std::string> { - if (value.is_string()) - return shellEscape(value); + auto json = *structuredAttrs; - if (value.is_number()) { - auto f = value.get<float>(); - if (std::ceil(f) == f) - return std::to_string(value.get<int>()); + /* Add an "outputs" object containing the output paths. */ + nlohmann::json outputs; + for (auto & i : drv->outputs) + outputs[i.first] = rewriteStrings(i.second.path, inputRewrites); + json["outputs"] = outputs; + + /* Handle exportReferencesGraph. */ + auto e = json.find("exportReferencesGraph"); + if (e != json.end() && e->is_object()) { + for (auto i = e->begin(); i != e->end(); ++i) { + std::ostringstream str; + { + JSONPlaceholder jsonRoot(str, true); + PathSet storePaths; + for (auto & p : *i) + storePaths.insert(p.get<std::string>()); + worker.store.pathInfoToJSON(jsonRoot, + exportReferences(storePaths), false, true); } + json[i.key()] = nlohmann::json::parse(str.str()); // urgh + } + } - if (value.is_null()) - return std::string("''"); + writeFile(tmpDir + "/.attrs.json", rewriteStrings(json.dump(), inputRewrites)); - if (value.is_boolean()) - return value.get<bool>() ? std::string("1") : std::string(""); + /* As a convenience to bash scripts, write a shell file that + maps all attributes that are representable in bash - + namely, strings, integers, nulls, Booleans, and arrays and + objects consisting entirely of those values. (So nested + arrays or objects are not supported.) */ - return {}; - }; + auto handleSimpleType = [](const nlohmann::json & value) -> std::experimental::optional<std::string> { + if (value.is_string()) + return shellEscape(value); - std::string jsonSh; + if (value.is_number()) { + auto f = value.get<float>(); + if (std::ceil(f) == f) + return std::to_string(value.get<int>()); + } - for (auto i = json.begin(); i != json.end(); ++i) { + if (value.is_null()) + return std::string("''"); - if (!std::regex_match(i.key(), shVarName)) continue; + if (value.is_boolean()) + return value.get<bool>() ? std::string("1") : std::string(""); - auto & value = i.value(); + return {}; + }; - auto s = handleSimpleType(value); - if (s) - jsonSh += fmt("declare %s=%s\n", i.key(), *s); + std::string jsonSh; - else if (value.is_array()) { - std::string s2; - bool good = true; + for (auto i = json.begin(); i != json.end(); ++i) { - for (auto i = value.begin(); i != value.end(); ++i) { - auto s3 = handleSimpleType(i.value()); - if (!s3) { good = false; break; } - s2 += *s3; s2 += ' '; - } + if (!std::regex_match(i.key(), shVarName)) continue; - if (good) - jsonSh += fmt("declare -a %s=(%s)\n", i.key(), s2); - } + auto & value = i.value(); - else if (value.is_object()) { - std::string s2; - bool good = true; + auto s = handleSimpleType(value); + if (s) + jsonSh += fmt("declare %s=%s\n", i.key(), *s); - for (auto i = value.begin(); i != value.end(); ++i) { - auto s3 = handleSimpleType(i.value()); - if (!s3) { good = false; break; } - s2 += fmt("[%s]=%s ", shellEscape(i.key()), *s3); - } + else if (value.is_array()) { + std::string s2; + bool good = true; - if (good) - jsonSh += fmt("declare -A %s=(%s)\n", i.key(), s2); + for (auto i = value.begin(); i != value.end(); ++i) { + auto s3 = handleSimpleType(i.value()); + if (!s3) { good = false; break; } + s2 += *s3; s2 += ' '; } + + if (good) + jsonSh += fmt("declare -a %s=(%s)\n", i.key(), s2); } - writeFile(tmpDir + "/.attrs.sh", jsonSh); + else if (value.is_object()) { + std::string s2; + bool good = true; - } catch (std::exception & e) { - throw Error("cannot process __json attribute of '%s': %s", drvPath, e.what()); + for (auto i = value.begin(); i != value.end(); ++i) { + auto s3 = handleSimpleType(i.value()); + if (!s3) { good = false; break; } + s2 += fmt("[%s]=%s ", shellEscape(i.key()), *s3); + } + + if (good) + jsonSh += fmt("declare -A %s=(%s)\n", i.key(), s2); + } } + + writeFile(tmpDir + "/.attrs.sh", rewriteStrings(jsonSh, inputRewrites)); } @@ -2917,7 +2998,7 @@ void DerivationGoal::runChild() writeFile(sandboxFile, sandboxProfile); - bool allowLocalNetworking = get(drv->env, "__darwinAllowLocalNetworking") == "1"; + bool allowLocalNetworking = 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. */ @@ -2989,10 +3070,9 @@ void DerivationGoal::runChild() /* Parse a list of reference specifiers. Each element must either be a store path, or the symbolic name of the output of the derivation (such as `out'). */ -PathSet parseReferenceSpecifiers(Store & store, const BasicDerivation & drv, string attr) +PathSet parseReferenceSpecifiers(Store & store, const BasicDerivation & drv, const Strings & paths) { PathSet result; - Paths paths = tokenizeString<Paths>(attr); for (auto & i : paths) { if (store.isStorePath(i)) result.insert(i); @@ -3121,7 +3201,7 @@ void DerivationGoal::registerOutputs() the derivation to its content-addressed location. */ Hash h2 = recursive ? hashPath(h.type, actualPath).first : hashFile(h.type, actualPath); - Path dest = worker.store.makeFixedOutputPath(recursive, h2, drv->env["name"]); + Path dest = worker.store.makeFixedOutputPath(recursive, h2, storePathToName(path)); if (h != h2) { @@ -3204,9 +3284,10 @@ void DerivationGoal::registerOutputs() /* Enforce `allowedReferences' and friends. */ auto checkRefs = [&](const string & attrName, bool allowed, bool recursive) { - if (drv->env.find(attrName) == drv->env.end()) return; + auto value = getStringsAttr(attrName); + if (!value) return; - PathSet spec = parseReferenceSpecifiers(worker.store, *drv, get(drv->env, attrName)); + PathSet spec = parseReferenceSpecifiers(worker.store, *drv, *value); PathSet used; if (recursive) { |