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https://github.com/NixOS/nix
synced 2025-06-27 08:31:16 +02:00
Generalise meta attributes
This commit is contained in:
Eelco Dolstra
parent
990126cde0
commit
0f24400d90
5 changed files with 208 additions and 208 deletions
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@ -2,116 +2,155 @@
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#include "util.hh"
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#include "eval-inline.hh"
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#include <cstring>
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namespace nix {
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string DrvInfo::queryDrvPath(EvalState & state) const
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string DrvInfo::queryDrvPath()
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{
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if (drvPath == "" && attrs) {
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Bindings::iterator i = attrs->find(state.sDrvPath);
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Bindings::iterator i = attrs->find(state->sDrvPath);
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PathSet context;
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(string &) drvPath = i != attrs->end() ? state.coerceToPath(*i->value, context) : "";
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drvPath = i != attrs->end() ? state->coerceToPath(*i->value, context) : "";
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}
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return drvPath;
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}
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string DrvInfo::queryOutPath(EvalState & state) const
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string DrvInfo::queryOutPath()
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{
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if (outPath == "" && attrs) {
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Bindings::iterator i = attrs->find(state.sOutPath);
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Bindings::iterator i = attrs->find(state->sOutPath);
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PathSet context;
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(string &) outPath = i != attrs->end() ? state.coerceToPath(*i->value, context) : "";
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outPath = i != attrs->end() ? state->coerceToPath(*i->value, context) : "";
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}
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return outPath;
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}
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DrvInfo::Outputs DrvInfo::queryOutputs(EvalState & state)
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DrvInfo::Outputs DrvInfo::queryOutputs()
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{
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if (outputs.empty()) {
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/* Get the ‘outputs’ list. */
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Bindings::iterator i = attrs->find(state.sOutputs);
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if (i == attrs->end())
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outputs["out"] = queryOutPath(state);
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else {
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state.forceList(*i->value);
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Bindings::iterator i;
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if (attrs && (i = attrs->find(state->sOutputs)) != attrs->end()) {
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state->forceList(*i->value);
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/* For each output... */
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for (unsigned int j = 0; j < i->value->list.length; ++j) {
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/* Evaluate the corresponding set. */
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string name = state.forceStringNoCtx(*i->value->list.elems[j]);
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Bindings::iterator out = attrs->find(state.symbols.create(name));
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string name = state->forceStringNoCtx(*i->value->list.elems[j]);
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Bindings::iterator out = attrs->find(state->symbols.create(name));
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if (out == attrs->end()) continue; // FIXME: throw error?
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state.forceAttrs(*out->value);
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state->forceAttrs(*out->value);
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/* And evaluate its ‘outPath’ attribute. */
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Bindings::iterator outPath = out->value->attrs->find(state.sOutPath);
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Bindings::iterator outPath = out->value->attrs->find(state->sOutPath);
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if (outPath == out->value->attrs->end()) continue; // FIXME: throw error?
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PathSet context;
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outputs[name] = state.coerceToPath(*outPath->value, context);
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outputs[name] = state->coerceToPath(*outPath->value, context);
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}
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}
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} else
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outputs["out"] = queryOutPath();
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}
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return outputs;
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}
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string DrvInfo::queryOutputName(EvalState & state) const
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string DrvInfo::queryOutputName()
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{
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if (outputName == "" && attrs) {
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Bindings::iterator i = attrs->find(state.sOutputName);
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(string &) outputName = i != attrs->end() ? state.forceStringNoCtx(*i->value) : "";
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Bindings::iterator i = attrs->find(state->sOutputName);
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outputName = i != attrs->end() ? state->forceStringNoCtx(*i->value) : "";
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}
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return outputName;
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}
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MetaInfo DrvInfo::queryMetaInfo(EvalState & state) const
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Bindings * DrvInfo::getMeta()
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{
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if (metaInfoRead) return meta;
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(bool &) metaInfoRead = true;
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Bindings::iterator a = attrs->find(state.sMeta);
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if (a == attrs->end()) return meta; /* fine, empty meta information */
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state.forceAttrs(*a->value);
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foreach (Bindings::iterator, i, *a->value->attrs) {
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MetaValue value;
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state.forceValue(*i->value);
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if (i->value->type == tString) {
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value.type = MetaValue::tpString;
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value.stringValue = i->value->string.s;
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} else if (i->value->type == tInt) {
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value.type = MetaValue::tpInt;
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value.intValue = i->value->integer;
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} else if (i->value->type == tList) {
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value.type = MetaValue::tpStrings;
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for (unsigned int j = 0; j < i->value->list.length; ++j)
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value.stringValues.push_back(state.forceStringNoCtx(*i->value->list.elems[j]));
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} else continue;
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((MetaInfo &) meta)[i->name] = value;
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}
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if (meta) return meta;
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if (!attrs) return 0;
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Bindings::iterator a = attrs->find(state->sMeta);
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if (a == attrs->end()) return 0;
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state->forceAttrs(*a->value);
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meta = a->value->attrs;
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return meta;
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}
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MetaValue DrvInfo::queryMetaInfo(EvalState & state, const string & name) const
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StringSet DrvInfo::queryMetaNames()
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{
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/* !!! evaluates all meta attributes => inefficient */
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return queryMetaInfo(state)[name];
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StringSet res;
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if (!getMeta()) return res;
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foreach (Bindings::iterator, i, *meta)
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res.insert(i->name);
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return res;
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}
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void DrvInfo::setMetaInfo(const MetaInfo & meta)
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Value * DrvInfo::queryMeta(const string & name)
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{
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metaInfoRead = true;
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this->meta = meta;
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if (!getMeta()) return 0;
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Bindings::iterator a = meta->find(state->symbols.create(name));
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if (a == meta->end()) return 0;
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state->forceValue(*a->value);
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return a->value;
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}
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string DrvInfo::queryMetaString(const string & name)
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{
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Value * v = queryMeta(name);
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if (!v || v->type != tString) return "";
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return v->string.s;
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}
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int DrvInfo::queryMetaInt(const string & name, int def)
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{
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Value * v = queryMeta(name);
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if (!v) return def;
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if (v->type == tInt) return v->integer;
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if (v->type == tString) {
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/* Backwards compatibility with before we had support for
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integer meta fields. */
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int n;
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if (string2Int(v->string.s, n)) return n;
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}
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return def;
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}
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bool DrvInfo::queryMetaBool(const string & name, bool def)
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{
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Value * v = queryMeta(name);
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if (!v) return def;
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if (v->type == tBool) return v->boolean;
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if (v->type == tString) {
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/* Backwards compatibility with before we had support for
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Boolean meta fields. */
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if (strcmp(v->string.s, "true") == 0) return true;
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if (strcmp(v->string.s, "false") == 0) return false;
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}
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return def;
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}
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void DrvInfo::setMeta(const string & name, Value * v)
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{
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getMeta();
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Bindings * old = meta;
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meta = new Bindings();
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Symbol sym = state->symbols.create(name);
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if (old)
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foreach (Bindings::iterator, i, *old)
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if (i->name != sym)
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meta->push_back(*i);
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if (v) meta->push_back(Attr(sym, v));
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meta->sort();
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}
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@ -136,22 +175,18 @@ static bool getDerivation(EvalState & state, Value & v,
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if (done.find(v.attrs) != done.end()) return false;
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done.insert(v.attrs);
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DrvInfo drv;
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Bindings::iterator i = v.attrs->find(state.sName);
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/* !!! We really would like to have a decent back trace here. */
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if (i == v.attrs->end()) throw TypeError("derivation name missing");
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drv.name = state.forceStringNoCtx(*i->value);
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Bindings::iterator i2 = v.attrs->find(state.sSystem);
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if (i2 == v.attrs->end())
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drv.system = "unknown";
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else
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drv.system = state.forceStringNoCtx(*i2->value);
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drv.attrs = v.attrs;
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drv.attrPath = attrPath;
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DrvInfo drv(
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state,
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state.forceStringNoCtx(*i->value),
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attrPath,
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i2 == v.attrs->end() ? "unknown" : state.forceStringNoCtx(*i2->value),
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v.attrs);
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drvs.push_back(drv);
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return false;
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@ -190,8 +225,6 @@ static void getDerivations(EvalState & state, Value & vIn,
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state.autoCallFunction(autoArgs, vIn, v);
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/* Process the expression. */
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DrvInfo drv;
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if (!getDerivation(state, v, pathPrefix, drvs, done, ignoreAssertionFailures)) ;
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else if (v.type == tAttrs) {
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@ -11,50 +11,50 @@
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namespace nix {
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struct MetaValue
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{
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enum { tpNone, tpString, tpStrings, tpInt } type;
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string stringValue;
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Strings stringValues;
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int intValue;
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};
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typedef std::map<string, MetaValue> MetaInfo;
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struct DrvInfo
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{
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public:
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typedef std::map<string, Path> Outputs;
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private:
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EvalState * state;
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string drvPath;
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string outPath;
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string outputName;
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Outputs outputs;
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bool metaInfoRead;
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MetaInfo meta;
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bool failed; // set if we get an AssertionError
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Bindings * attrs, * meta;
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Bindings * getMeta();
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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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/* !!! make this private */
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Bindings * attrs;
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DrvInfo(EvalState & state) : state(&state), failed(false), attrs(0), meta(0) { };
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DrvInfo(EvalState & state, const string & name, const string & attrPath, const string & system, Bindings * attrs)
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: state(&state), failed(false), attrs(attrs), meta(0), name(name), attrPath(attrPath), system(system) { };
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DrvInfo() : metaInfoRead(false), failed(false), attrs(0) { };
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string queryDrvPath();
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string queryOutPath();
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string queryOutputName();
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Outputs queryOutputs();
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string queryDrvPath(EvalState & state) const;
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string queryOutPath(EvalState & state) const;
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string queryOutputName(EvalState & state) const;
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Outputs queryOutputs(EvalState & state);
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StringSet queryMetaNames();
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Value * queryMeta(const string & name);
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string queryMetaString(const string & name);
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int queryMetaInt(const string & name, int def);
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bool queryMetaBool(const string & name, bool def);
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void setMeta(const string & name, Value * v);
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/*
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MetaInfo queryMetaInfo(EvalState & state) const;
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MetaValue queryMetaInfo(EvalState & state, const string & name) const;
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*/
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void setDrvPath(const string & s)
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{
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@ -66,8 +66,6 @@ public:
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outPath = s;
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}
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void setMetaInfo(const MetaInfo & meta);
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void setFailed() { failed = true; };
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bool hasFailed() { return failed; };
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};
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