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authorBoris Kolpackov <boris@codesynthesis.com>2022-07-05 09:14:38 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2022-07-05 09:14:38 +0200
commitdb2cf5ca0348788bfd8b3052c03279db1d971d2f (patch)
tree3987e4b9f46ed0a0b8d7c4c90dc6749b4e14740b /libbuild2/cc/pkgconfig.cxx
parent651caf2377c5b7c144386c6a479c98d1cb98d417 (diff)
Recognize special .for_install variable suffix in library user metadata
Diffstat (limited to 'libbuild2/cc/pkgconfig.cxx')
-rw-r--r--libbuild2/cc/pkgconfig.cxx104
1 files changed, 79 insertions, 25 deletions
diff --git a/libbuild2/cc/pkgconfig.cxx b/libbuild2/cc/pkgconfig.cxx
index 29de44f..1642180 100644
--- a/libbuild2/cc/pkgconfig.cxx
+++ b/libbuild2/cc/pkgconfig.cxx
@@ -1730,26 +1730,78 @@ namespace build2
// If this is the common .pc file, then we only look in the group.
// Otherwise, in the member and the group.
//
+ // To allow setting different values for the for-install and
+ // development build cases (required when a library comes with
+ // additional "assets"), we recognize the special .for_install
+ // variable name suffix: if there is a both <prefix>.<name> and
+ // <prefix>.<name>.for_install variables, then here we take the
+ // value from the latter. Note that we don't consider just
+ // <prefix>.for_install as special (so it's available to the user).
+ //
// We only expect a handful of variables so let's use a vector and
// linear search instead of a map.
//
- using binding = pair<const variable*, const value*>;
+ struct binding
+ {
+ const string* name; // Name to be saved (without .for_install).
+ const variable* var; // Actual variable (potentially .for_install).
+ const value* val; // Actual value.
+ };
vector<binding> vars;
- auto append = [&pfx, &vars] (const target& t, bool dup)
+ auto append = [this,
+ &l, &pfx, &vars,
+ tmp = string ()] (const target& t, bool dup) mutable
{
for (auto p (t.vars.lookup_namespace (pfx));
p.first != p.second;
++p.first)
{
- const variable& var (p.first->first);
+ const variable* var (&p.first->first.get ());
+
+ // Handle .for_install.
+ //
+ // The plan is as follows: if this is .for_install, then just
+ // verify we also have the value without the suffix and skip
+ // it. Otherwise, check if there also the .for_install variant
+ // and if so, use that instead. While we could probably do this
+ // more efficiently by remembering what we saw in vars, this is
+ // not performance-sensitive and so we keep it simple for now.
+ //
+ const string* name;
+ {
+ const string& v (var->name);
+ size_t n (v.size ());
+
+ if (n > pfx.size () + 1 + 12 && // <prefix>..for_install
+ v.compare (n - 12, 12, ".for_install") == 0)
+ {
+ tmp.assign (v, 0, n - 12);
+
+ if (t.vars.find (tmp) == t.vars.end ())
+ fail << v << " variant without " << tmp << " in library "
+ << l;
+
+ continue;
+ }
+ else
+ {
+ name = &v;
+
+ tmp = v; tmp += ".for_install";
+
+ auto i (t.vars.find (tmp));
+ if (i != t.vars.end ())
+ var = &i->first.get ();
+ }
+ }
if (dup)
{
if (find_if (vars.begin (), vars.end (),
- [&var] (const binding& p)
+ [name] (const binding& p)
{
- return p.first == &var;
+ return *p.name == *name;
}) != vars.end ())
continue;
}
@@ -1757,10 +1809,10 @@ namespace build2
// Re-lookup the value in order to apply target type/pattern
// specific prepends/appends.
//
- lookup l (t[var]);
+ lookup l (t[*var]);
assert (l.defined ());
- vars.emplace_back (&var, l.value);
+ vars.push_back (binding {name, var, l.value});
}
};
@@ -1781,46 +1833,48 @@ namespace build2
for (const binding& b: vars)
{
- const string& n (b.first->name);
- const value& v (*b.second);
+ const variable& var (*b.var);
+ const value& val (*b.val);
// There is no notion of NULL in pkg-config variables and it's
// probably best not to conflate them with empty.
//
- if (v.null)
- fail << "null value in exported variable " << n
+ if (val.null)
+ fail << "null value in exported variable " << var
<< " of library " << l;
- if (v.type == nullptr)
- fail << "untyped value in exported variable " << n
+ if (val.type == nullptr)
+ fail << "untyped value in exported variable " << var
<< " of library " << l;
// Tighten this to only a sensible subset of types (see
// parsing/serialization code for some of the potential problems).
//
- if (!metadata_type (v.type->name).first)
- fail << "unsupported value type " << v.type->name
- << " in exported variable " << n << " of library " << l;
+ if (!metadata_type (val.type->name).first)
+ fail << "unsupported value type " << val.type->name
+ << " in exported variable " << var << " of library " << l;
- os << ' ' << n << '/' << v.type->name;
+ os << " \\" << endl
+ << *b.name << '/' << val.type->name;
}
- os << endl;
+ os << endl
+ << endl;
// Now the variables themselves.
//
string s; // Reuse the buffer.
for (const binding& b: vars)
{
- const string& n (b.first->name);
- const value& v (*b.second);
+ const variable& var (*b.var);
+ const value& val (*b.val);
names ns;
- names_view nv (reverse (v, ns));
+ names_view nv (reverse (val, ns));
- os << n << " =";
+ os << *b.name << " =";
- auto append = [&l, &n, &s] (const name& v)
+ auto append = [&l, &var, &s] (const name& v)
{
if (v.simple ())
s += v.value;
@@ -1831,7 +1885,7 @@ namespace build2
// check but let's keep it for good measure.
//
fail << "simple or directory value expected instead of '"
- << v << "' in exported variable " << n << " of library "
+ << v << "' in exported variable " << var << " of library "
<< l;
};
@@ -1850,7 +1904,7 @@ namespace build2
s += i->pair;
append (*++i);
#else
- fail << "pair in exported variable " << n << " of library "
+ fail << "pair in exported variable " << var << " of library "
<< l;
#endif
}