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* Support integers and lists of strings in meta fields. This is

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useful for fields like meta.maintainers, meta.priority (which can be
  a proper integer now) and even meta.license (if there are multiple
  licenses).
This commit is contained in:
Eelco Dolstra 2009-06-30 15:53:39 +00:00
parent f2c3fc5191
commit 749dd97a54
3 changed files with 106 additions and 41 deletions
Download patch file Download diff file Expand all files Collapse all files

46
src/libexpr/get-drvs.cc
View file

@ -50,31 +50,55 @@ MetaInfo DrvInfo::queryMetaInfo(EvalState & state) const
Expr e = evalExpr(state, i->value);
string s;
PathSet context;
if (matchStr(e, s, context))
meta[aterm2String(i->key)] = s;
/* For future compatibility, ignore attribute values that are
not strings. */
MetaValue value;
int n;
ATermList es;
if (matchStr(e, s, context)) {
value.type = MetaValue::tpString;
value.stringValue = s;
meta[aterm2String(i->key)] = value;
} else if (matchInt(e, n)) {
value.type = MetaValue::tpInt;
value.intValue = n;
meta[aterm2String(i->key)] = value;
} else if (matchList(e, es)) {
value.type = MetaValue::tpStrings;
for (ATermIterator j(es); j; ++j)
value.stringValues.push_back(evalStringNoCtx(state, *j));
meta[aterm2String(i->key)] = value;
}
}
return meta;
}
string DrvInfo::queryMetaInfo(EvalState & state, const string & name) const
MetaValue DrvInfo::queryMetaInfo(EvalState & state, const string & name) const
{
/* !!! evaluates all meta attributes => inefficient */
MetaInfo meta = queryMetaInfo(state);
MetaInfo::iterator i = meta.find(name);
return i == meta.end() ? "" : i->second;
return queryMetaInfo(state)[name];
}
void DrvInfo::setMetaInfo(const MetaInfo & meta)
{
ATermMap metaAttrs;
for (MetaInfo::const_iterator i = meta.begin(); i != meta.end(); ++i)
metaAttrs.set(toATerm(i->first),
makeAttrRHS(makeStr(i->second), makeNoPos()));
foreach (MetaInfo::const_iterator, i, meta) {
Expr e;
switch (i->second.type) {
case MetaValue::tpInt: e = makeInt(i->second.intValue); break;
case MetaValue::tpString: e = makeStr(i->second.stringValue); break;
case MetaValue::tpStrings: {
ATermList es = ATempty;
foreach (Strings::const_iterator, j, i->second.stringValues)
es = ATinsert(es, makeStr(*j));
e = makeList(ATreverse(es));
break;
}
default: abort();
}
metaAttrs.set(toATerm(i->first), makeAttrRHS(e, makeNoPos()));
}
attrs->set(toATerm("meta"), makeAttrs(metaAttrs));
}

13
src/libexpr/get-drvs.hh
View file

@ -12,7 +12,16 @@
namespace nix {
typedef std::map<string, string> MetaInfo;
struct MetaValue
{
enum { tpNone, tpString, tpStrings, tpInt } type;
string stringValue;
Strings stringValues;
int intValue;
};
typedef std::map<string, MetaValue> MetaInfo;
struct DrvInfo
@ -34,7 +43,7 @@ public:
string queryDrvPath(EvalState & state) const;
string queryOutPath(EvalState & state) const;
MetaInfo queryMetaInfo(EvalState & state) const;
string queryMetaInfo(EvalState & state, const string & name) const;
MetaValue queryMetaInfo(EvalState & state, const string & name) const;
void setDrvPath(const string & s)
{