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#include "util.hh"
string thisSystem = SYSTEM;
string nixHomeDir = "/nix";
string nixHomeDirEnvVar = "NIX";
string absPath(string filename, string dir)
{
if (filename[0] != '/') {
if (dir == "") {
char buf[PATH_MAX];
if (!getcwd(buf, sizeof(buf)))
throw Error("cannot get cwd");
dir = buf;
}
filename = dir + "/" + filename;
/* !!! canonicalise */
char resolved[PATH_MAX];
if (!realpath(filename.c_str(), resolved))
throw Error("cannot canonicalise path " + filename);
filename = resolved;
}
return filename;
}
/* Return the directory part of the given path, i.e., everything
before the final `/'. */
string dirOf(string s)
{
unsigned int pos = s.rfind('/');
if (pos == string::npos) throw Error("invalid file name");
return string(s, 0, pos);
}
/* Return the base name of the given path, i.e., everything following
the final `/'. */
string baseNameOf(string s)
{
unsigned int pos = s.rfind('/');
if (pos == string::npos) throw Error("invalid file name");
return string(s, pos + 1);
}
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