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Clean up a few things related to profiles (#8526)

Browse source 
- Greatly expand API docs

- Clean up code in misc ways

  - Instead of a complicated single loop on generations, do different
    operations in successive subsequent steps.

  - Avoid `ref` in one place where `&` is fine

  - Just return path instead of mutating an argument in `makeName`

Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>
This commit is contained in:
John Ericson 2023-06-19 00:04:59 -04:00 • committed by GitHub
parent 7bf17f8825
commit c404623a1d
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7 changed files with 224 additions and 69 deletions
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7
src/nix-env/nix-env.cc
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@ -772,7 +772,7 @@ static void opSet(Globals & globals, Strings opFlags, Strings opArgs)
debug("switching to new user environment");
Path generation = createGeneration(
ref<LocalFSStore>(store2),
*store2,
globals.profile,
drv.queryOutPath());
switchLink(globals.profile, generation);
@ -1356,13 +1356,14 @@ static void opDeleteGenerations(Globals & globals, Strings opFlags, Strings opAr
if (opArgs.size() == 1 && opArgs.front() == "old") {
deleteOldGenerations(globals.profile, globals.dryRun);
} else if (opArgs.size() == 1 && opArgs.front().find('d') != std::string::npos) {
deleteGenerationsOlderThan(globals.profile, opArgs.front(), globals.dryRun);
auto t = parseOlderThanTimeSpec(opArgs.front());
deleteGenerationsOlderThan(globals.profile, t, globals.dryRun);
} else if (opArgs.size() == 1 && opArgs.front().find('+') != std::string::npos) {
if (opArgs.front().size() < 2)
throw Error("invalid number of generations '%1%'", opArgs.front());
auto str_max = opArgs.front().substr(1);
auto max = string2Int<GenerationNumber>(str_max);
if (!max || *max == 0)
if (!max)
throw Error("invalid number of generations to keep '%1%'", opArgs.front());
deleteGenerationsGreaterThan(globals.profile, *max, globals.dryRun);
} else {