diff options
Diffstat (limited to 'nixos/modules/installer/tools/nixos-option/libnix-copy-paste.cc')
-rw-r--r-- | nixos/modules/installer/tools/nixos-option/libnix-copy-paste.cc | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/nixos/modules/installer/tools/nixos-option/libnix-copy-paste.cc b/nixos/modules/installer/tools/nixos-option/libnix-copy-paste.cc new file mode 100644 index 00000000000..875c07da639 --- /dev/null +++ b/nixos/modules/installer/tools/nixos-option/libnix-copy-paste.cc @@ -0,0 +1,83 @@ +// These are useful methods inside the nix library that ought to be exported. +// Since they are not, copy/paste them here. +// TODO: Delete these and use the ones in the library as they become available. + +#include <nix/config.h> // for nix/globals.hh's reference to SYSTEM + +#include "libnix-copy-paste.hh" +#include <boost/format/alt_sstream.hpp> // for basic_altstringbuf... +#include <boost/format/alt_sstream_impl.hpp> // for basic_altstringbuf... +#include <boost/format/format_class.hpp> // for basic_format +#include <boost/format/format_fwd.hpp> // for format +#include <boost/format/format_implementation.hpp> // for basic_format::basi... +#include <boost/optional/optional.hpp> // for get_pointer +#include <iostream> // for operator<<, basic_... +#include <nix/types.hh> // for Strings, Error +#include <string> // for string, basic_string + +using boost::format; +using nix::Error; +using nix::Strings; +using std::string; + +// From nix/src/libexpr/attr-path.cc +Strings parseAttrPath(const string & s) +{ + Strings res; + string cur; + string::const_iterator i = s.begin(); + while (i != s.end()) { + if (*i == '.') { + res.push_back(cur); + cur.clear(); + } else if (*i == '"') { + ++i; + while (1) { + if (i == s.end()) + throw Error(format("missing closing quote in selection path '%1%'") % s); + if (*i == '"') + break; + cur.push_back(*i++); + } + } else + cur.push_back(*i); + ++i; + } + if (!cur.empty()) + res.push_back(cur); + return res; +} + +// From nix/src/nix/repl.cc +bool isVarName(const string & s) +{ + if (s.size() == 0) + return false; + char c = s[0]; + if ((c >= '0' && c <= '9') || c == '-' || c == '\'') + return false; + for (auto & i : s) + if (!((i >= 'a' && i <= 'z') || (i >= 'A' && i <= 'Z') || (i >= '0' && i <= '9') || i == '_' || i == '-' || + i == '\'')) + return false; + return true; +} + +// From nix/src/nix/repl.cc +std::ostream & printStringValue(std::ostream & str, const char * string) +{ + str << "\""; + for (const char * i = string; *i; i++) + if (*i == '\"' || *i == '\\') + str << "\\" << *i; + else if (*i == '\n') + str << "\\n"; + else if (*i == '\r') + str << "\\r"; + else if (*i == '\t') + str << "\\t"; + else + str << *i; + str << "\""; + return str; +} |