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* Operation `--delete-generations' to delete generations of a

Browse source 
profile.  Arguments are either generation number, or `old' to delete
  all non-current generations.  Typical use:

  $ nix-env --delete-generations old
  $ nix-collect-garbage

* istringstream -> string2Int.
This commit is contained in:
Eelco Dolstra 2004-09-10 13:32:08 +00:00
parent c16be6ac92
commit dcc433de47
8 changed files with 100 additions and 33 deletions
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12
src/nix-env/names.cc
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@ -56,20 +56,10 @@ static string nextComponent(string::const_iterator & p,
}
#include <fstream>
static bool parseInt(const string & s, int & n)
{
istringstream st(s);
st >> n;
return !st.fail();
}
static bool componentsLT(const string & c1, const string & c2)
{
int n1, n2;
bool c1Num = parseInt(c1, n1), c2Num = parseInt(c2, n2);
bool c1Num = string2Int(c1, n1), c2Num = string2Int(c2, n2);
if (c1Num && c2Num) return n1 < n2;
else if (c1 == "" && c2Num) return true;