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* A command `--list-generations' to show all generations for a

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profile.
This commit is contained in:
Eelco Dolstra 2004-02-06 16:03:27 +00:00
parent 7c0fa4474f
commit 73ab2ed4fd
3 changed files with 80 additions and 9 deletions
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41
src/nix-env/profiles.cc
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@ -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) {