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Code Activity

Clean up the lock file handling flags

Browse source 
Added a flag --no-update-lock-file to barf if the lock file needs any
changes. This is useful for CI systems if you're building a
checkout. Fixes #2947.

Renamed --no-save-lock-file to --no-write-lock-file. It is now a fatal
error if the lock file needs changes but --no-write-lock-file is not
given.
This commit is contained in:
Eelco Dolstra 2020-01-29 21:01:34 +01:00
parent f68bed7f67
commit 26f895a26d
7 changed files with 78 additions and 75 deletions
Download patch file Download diff file Expand all files Collapse all files

47
src/libexpr/flake/flake.cc
View file

@ -251,17 +251,6 @@ static std::pair<fetchers::Tree, FlakeRef> getNonFlake(
return std::make_pair(std::move(sourceInfo), resolvedRef);
}
bool allowedToUseRegistries(LockFileMode handle, bool isTopRef)
{
if (handle == AllPure) return false;
else if (handle == TopRefUsesRegistries) return isTopRef;
else if (handle == UpdateLockFile) return true;
else if (handle == UseUpdatedLockFile) return true;
else if (handle == RecreateLockFile) return true;
else if (handle == UseNewLockFile) return true;
else assert(false);
}
static void flattenLockFile(
const LockedInputs & inputs,
const InputPath & prefix,
@ -311,20 +300,17 @@ static std::string diffLockFiles(const LockedInputs & oldLocks, const LockedInpu
LockedFlake lockFlake(
EvalState & state,
const FlakeRef & topRef,
LockFileMode lockFileMode,
const LockFlags & lockFlags)
{
settings.requireExperimentalFeature("flakes");
RefMap refMap;
auto flake = getFlake(state, topRef,
allowedToUseRegistries(lockFileMode, true), refMap);
auto flake = getFlake(state, topRef, lockFlags.useRegistries, refMap);
LockFile oldLockFile;
if (lockFileMode != RecreateLockFile && lockFileMode != UseNewLockFile) {
// If recreateLockFile, start with an empty lockfile
if (!lockFlags.recreateLockFile) {
// FIXME: symlink attack
oldLockFile = LockFile::read(
flake.sourceInfo->actualPath + "/" + flake.resolvedRef.subdir + "/flake.lock");
@ -436,12 +422,13 @@ LockedFlake lockFlake(
} else {
/* We need to update/create a new lock file
entry. So fetch the flake/non-flake. */
if (lockFileMode == AllPure || lockFileMode == TopRefUsesRegistries)
if (!lockFlags.allowMutable && !input.ref.isImmutable())
throw Error("cannot update flake input '%s' in pure mode", inputPathS);
if (input.isFlake) {
auto inputFlake = getFlake(state, input.ref,
allowedToUseRegistries(lockFileMode, false), refMap);
lockFlags.useRegistries, refMap);
newLocks.inputs.insert_or_assign(id,
LockedInput(inputFlake.resolvedRef, inputFlake.originalRef, inputFlake.sourceInfo->narHash));
@ -461,7 +448,7 @@ LockedFlake lockFlake(
else {
auto [sourceInfo, resolvedRef] = getNonFlake(state, input.ref,
allowedToUseRegistries(lockFileMode, false), refMap);
lockFlags.useRegistries, refMap);
newLocks.inputs.insert_or_assign(id,
LockedInput(resolvedRef, input.ref, sourceInfo.narHash));
}
@ -494,12 +481,15 @@ LockedFlake lockFlake(
if (!(oldLockFile == LockFile()))
printInfo("inputs of flake '%s' changed:\n%s", topRef, chomp(diffLockFiles(oldLockFile, newLockFile)));
if (lockFileMode == UpdateLockFile || lockFileMode == RecreateLockFile) {
if (lockFlags.writeLockFile) {
if (auto sourcePath = topRef.input->getSourcePath()) {
if (!newLockFile.isImmutable()) {
if (settings.warnDirty)
warn("will not write lock file of flake '%s' because it has a mutable input", topRef);
} else {
if (!lockFlags.updateLockFile)
throw Error("flake '%s' requires lock file changes but they're not allowed due to '--no-update-lock-file'", topRef);
auto path = *sourcePath + (topRef.subdir == "" ? "" : "/" + topRef.subdir) + "/flake.lock";
if (pathExists(path))
@ -522,9 +512,9 @@ LockedFlake lockFlake(
#endif
}
} else
warn("cannot write lock file of remote flake '%s'", topRef);
} else if (lockFileMode != AllPure && lockFileMode != TopRefUsesRegistries)
warn("using updated lock file without writing it to file");
throw Error("cannot write modified lock file of flake '%s' (use '--no-write-lock-file' to ignore)", topRef);
} else
warn("not writing modified lock file of flake '%s'", topRef);
}
return LockedFlake { .flake = std::move(flake), .lockFile = std::move(newLockFile) };
@ -655,9 +645,14 @@ void callFlake(EvalState & state,
// This function is exposed to be used in nix files.
static void prim_getFlake(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
LockFlags lockFlags;
callFlake(state, lockFlake(state, parseFlakeRef(state.forceStringNoCtx(*args[0], pos)),
evalSettings.pureEval ? AllPure : UseUpdatedLockFile, lockFlags), v);
callFlake(state,
lockFlake(state, parseFlakeRef(state.forceStringNoCtx(*args[0], pos)),
LockFlags {
.updateLockFile = false,
.useRegistries = !evalSettings.pureEval,
.allowMutable = !evalSettings.pureEval,
}),
v);
}
static RegisterPrimOp r2("getFlake", 1, prim_getFlake);