diff options
Diffstat (limited to 'src/nix-env/profiles.cc')
| -rw-r--r-- | src/nix-env/profiles.cc | 41 |
1 files changed, 37 insertions, 4 deletions
diff --git a/src/nix-env/profiles.cc b/src/nix-env/profiles.cc index 5b9c00406..22da6336b 100644 --- a/src/nix-env/profiles.cc +++ b/src/nix-env/profiles.cc @@ -1,13 +1,23 @@ #include "profiles.hh" +#include <sys/types.h> +#include <sys/stat.h> +#include <unistd.h> -Path createGeneration(Path profile, Path outPath, Path drvPath) + +static bool cmpGensByNumber(const Generation & a, const Generation & b) { + return a.number < b.number; +} + + +Generations findGenerations(Path profile) +{ + Generations gens; + Path profileDir = dirOf(profile); string profileName = baseNameOf(profile); - unsigned int num = 0; - Strings names = readDirectory(profileDir); for (Strings::iterator i = names.begin(); i != names.end(); ++i) { if (string(*i, 0, profileName.size() + 1) != profileName + "-") continue; @@ -16,9 +26,32 @@ Path createGeneration(Path profile, Path outPath, Path drvPath) if (p == string::npos) continue; istringstream str(string(s, 0, p)); unsigned int n; - if (str >> n && str.eof() && n >= num) num = n + 1; + if (str >> n && str.eof()) { + Generation gen; + gen.path = profileDir + "/" + *i; + gen.number = n; + struct stat st; + if (lstat(gen.path.c_str(), &st) != 0) + throw SysError(format("statting `%1%'") % gen.path); + gen.creationTime = st.st_mtime; + gens.push_back(gen); + } } + gens.sort(cmpGensByNumber); + + return gens; +} + + +Path createGeneration(Path profile, Path outPath, Path drvPath) +{ + /* The new generation number should be higher than old the + previous ones. */ + Generations gens = findGenerations(profile); + unsigned int num = gens.size() > 0 ? gens.front().number : 0; + + /* Create the new generation. */ Path generation, gcrootSrc; while (1) { |