forked from lix-project/lix
Merge pull request #767 from mogorman/garbage_collect_keep_last_few
Implement --delete-generations + flag for keeping last N number of gens
This commit is contained in:
commit
93aa3bea2e
|
@ -1346,11 +1346,12 @@ $ nix-env --list-generations
|
|||
<para>This operation deletes the specified generations of the current
|
||||
profile. The generations can be a list of generation numbers, the
|
||||
special value <literal>old</literal> to delete all non-current
|
||||
generations, or a value such as <literal>30d</literal> to delete all
|
||||
generations, a value such as <literal>30d</literal> to delete all
|
||||
generations older than the specified number of days (except for the
|
||||
generation that was active at that point in time).
|
||||
Periodically deleting old generations is important to make garbage
|
||||
collection effective.</para>
|
||||
generation that was active at that point in time), or a value such as.
|
||||
<literal>+5</literal> to only keep the specified items older than the
|
||||
current generation. Periodically deleting old generations is important
|
||||
to make garbage collection effective.</para>
|
||||
|
||||
</refsection>
|
||||
|
||||
|
@ -1359,6 +1360,8 @@ collection effective.</para>
|
|||
<screen>
|
||||
$ nix-env --delete-generations 3 4 8
|
||||
|
||||
$ nix-env --delete-generations +5
|
||||
|
||||
$ nix-env --delete-generations 30d
|
||||
|
||||
$ nix-env -p other_profile --delete-generations old</screen>
|
||||
|
@ -1458,7 +1461,7 @@ error: no generation older than the current (91) exists</screen>
|
|||
<refsection condition="manpage"><title>Environment variables</title>
|
||||
|
||||
<variablelist>
|
||||
|
||||
|
||||
<varlistentry><term><envar>NIX_PROFILE</envar></term>
|
||||
|
||||
<listitem><para>Location of the Nix profile. Defaults to the
|
||||
|
@ -1472,6 +1475,6 @@ error: no generation older than the current (91) exists</screen>
|
|||
</variablelist>
|
||||
|
||||
</refsection>
|
||||
|
||||
|
||||
|
||||
</refentry>
|
||||
|
|
|
@ -157,6 +157,29 @@ void deleteGenerations(const Path & profile, const std::set<unsigned int> & gens
|
|||
}
|
||||
}
|
||||
|
||||
void deleteGenerationsGreaterThan(const Path & profile, int max, bool dryRun)
|
||||
{
|
||||
PathLocks lock;
|
||||
lockProfile(lock, profile);
|
||||
|
||||
int curGen;
|
||||
bool fromCurGen = false;
|
||||
Generations gens = findGenerations(profile, curGen);
|
||||
for (auto i = gens.rbegin(); i != gens.rend(); ++i) {
|
||||
if (i->number == curGen) {
|
||||
fromCurGen = true;
|
||||
max--;
|
||||
continue;
|
||||
}
|
||||
if (fromCurGen) {
|
||||
if (max) {
|
||||
max--;
|
||||
continue;
|
||||
}
|
||||
deleteGeneration2(profile, i->number, dryRun);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void deleteOldGenerations(const Path & profile, bool dryRun)
|
||||
{
|
||||
|
|
|
@ -39,6 +39,8 @@ void deleteGeneration(const Path & profile, unsigned int gen);
|
|||
|
||||
void deleteGenerations(const Path & profile, const std::set<unsigned int> & gensToDelete, bool dryRun);
|
||||
|
||||
void deleteGenerationsGreaterThan(const Path & profile, const int max, bool dryRun);
|
||||
|
||||
void deleteOldGenerations(const Path & profile, bool dryRun);
|
||||
|
||||
void deleteGenerationsOlderThan(const Path & profile, time_t t, bool dryRun);
|
||||
|
|
|
@ -1284,6 +1284,14 @@ static void opDeleteGenerations(Globals & globals, Strings opFlags, Strings opAr
|
|||
deleteOldGenerations(globals.profile, globals.dryRun);
|
||||
} else if (opArgs.size() == 1 && opArgs.front().find('d') != string::npos) {
|
||||
deleteGenerationsOlderThan(globals.profile, opArgs.front(), globals.dryRun);
|
||||
} else if (opArgs.size() == 1 && opArgs.front().find('+') != string::npos) {
|
||||
if(opArgs.front().size() < 2)
|
||||
throw Error(format("invalid number of generations ‘%1%’") % opArgs.front());
|
||||
string str_max = string(opArgs.front(), 1, opArgs.front().size());
|
||||
int max;
|
||||
if (!string2Int(str_max, max) || max == 0)
|
||||
throw Error(format("invalid number of generations to keep ‘%1%’") % opArgs.front());
|
||||
deleteGenerationsGreaterThan(globals.profile, max, globals.dryRun);
|
||||
} else {
|
||||
std::set<unsigned int> gens;
|
||||
for (auto & i : opArgs) {
|
||||
|
|
Loading…
Reference in a new issue