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nix/src/libexpr/search-path.cc
John Ericson cc24766fa6 Expose the nix component in header include paths
For example, instead of doing

    #include "nix/store-config.hh"
    #include "nix/derived-path.hh"

Now do

    #include "nix/store/config.hh"
    #include "nix/store/derived-path.hh"

This was originally planned in the issue, and also recent requested by
Eelco.

Most of the change is purely mechanical. There is just one small
additional issue. See how, in the example above, we took this
opportunity to also turn `<comp>-config.hh` into `<comp>/config.hh`.
Well, there was already a `nix/util/config.{cc,hh}`. Even though there
is not a public configuration header for libutil (which also would be
called `nix/util/config.{cc,hh}`) that's still confusing, To avoid any
such confusion, we renamed that to `nix/util/configuration.{cc,hh}`.

Finally, note that the libflake headers already did this, so we didn't
need to do anything to them. We wouldn't want to mistakenly get
`nix/flake/flake/flake.hh`!

Progress on #7876
2025-04-01 11:40:42 -04:00

55 lines
1.2 KiB
C++

#include "nix/expr/search-path.hh"
namespace nix {
std::optional<std::string_view> LookupPath::Prefix::suffixIfPotentialMatch(
std::string_view path) const
{
auto n = s.size();
/* Non-empty prefix and suffix must be separated by a /, or the
prefix is not a valid path prefix. */
bool needSeparator = n > 0 && n < path.size();
if (needSeparator && path[n] != '/') {
return std::nullopt;
}
/* Prefix must be prefix of this path. */
if (path.compare(0, n, s) != 0) {
return std::nullopt;
}
/* Skip next path separator. */
return {
path.substr(needSeparator ? n + 1 : n)
};
}
LookupPath::Elem LookupPath::Elem::parse(std::string_view rawElem)
{
size_t pos = rawElem.find('=');
return LookupPath::Elem {
.prefix = Prefix {
.s = pos == std::string::npos
? std::string { "" }
: std::string { rawElem.substr(0, pos) },
},
.path = Path {
.s = std::string { rawElem.substr(pos + 1) },
},
};
}
LookupPath LookupPath::parse(const Strings & rawElems)
{
LookupPath res;
for (auto & rawElem : rawElems)
res.elements.emplace_back(LookupPath::Elem::parse(rawElem));
return res;
}
}