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* Get rid of the substitutes database table (NIX-47). Instead, if we

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need any info on substitutable paths, we just call the substituters
  (such as download-using-manifests.pl) directly.  This means that
  it's no longer necessary for nix-pull to register substitutes or for
  nix-channel to clear them, which makes those operations much faster
  (NIX-95).  Also, we don't have to worry about keeping nix-pull
  manifests (in /nix/var/nix/manifests) and the database in sync with
  each other.

  The downside is that there is some overhead in calling an external
  program to get the substitutes info.  For instance, "nix-env -qas"
  takes a bit longer.

  Abolishing the substitutes table also makes the logic in
  local-store.cc simpler, as we don't need to store info for invalid
  paths.  On the downside, you cannot do things like "nix-store -qR"
  on a substitutable but invalid path (but nobody did that anyway).

* Never catch interrupts (the Interrupted exception).
This commit is contained in:
Eelco Dolstra 2007-08-12 00:29:28 +00:00
parent 4695f4edd6
commit 9e975458b4
24 changed files with 357 additions and 469 deletions
Download patch file Download diff file Expand all files Collapse all files

66
src/nix-store/nix-store.cc
View file

@ -413,54 +413,6 @@ static void opReadLog(Strings opFlags, Strings opArgs)
}
static void opRegisterSubstitutes(Strings opFlags, Strings opArgs)
{
if (!opFlags.empty()) throw UsageError("unknown flag");
if (!opArgs.empty()) throw UsageError("no arguments expected");
Transaction txn;
createStoreTransaction(txn);
while (1) {
Path srcPath;
Substitute sub;
PathSet references;
getline(cin, srcPath);
if (cin.eof()) break;
getline(cin, sub.deriver);
getline(cin, sub.program);
string s; int n;
getline(cin, s);
if (!string2Int(s, n)) throw Error("number expected");
while (n--) {
getline(cin, s);
sub.args.push_back(s);
}
getline(cin, s);
if (!string2Int(s, n)) throw Error("number expected");
while (n--) {
getline(cin, s);
references.insert(s);
}
if (!cin || cin.eof()) throw Error("missing input");
registerSubstitute(txn, srcPath, sub);
setReferences(txn, srcPath, references);
}
txn.commit();
}
static void opClearSubstitutes(Strings opFlags, Strings opArgs)
{
if (!opFlags.empty()) throw UsageError("unknown flag");
if (!opArgs.empty())
throw UsageError("no arguments expected");
clearSubstitutes();
}
static void opRegisterValidity(Strings opFlags, Strings opArgs)
{
bool reregister = false; // !!! maybe this should be the default
@ -475,18 +427,8 @@ static void opRegisterValidity(Strings opFlags, Strings opArgs)
ValidPathInfos infos;
while (1) {
ValidPathInfo info;
getline(cin, info.path);
if (cin.eof()) break;
getline(cin, info.deriver);
string s; int n;
getline(cin, s);
if (!string2Int(s, n)) throw Error("number expected");
while (n--) {
getline(cin, s);
info.references.insert(s);
}
if (!cin || cin.eof()) throw Error("missing input");
ValidPathInfo info = decodeValidPathInfo(cin);
if (info.path == "") break;
if (!store->isValidPath(info.path) || reregister) {
/* !!! races */
canonicalisePathMetaData(info.path);
@ -699,10 +641,6 @@ void run(Strings args)
op = opQuery;
else if (arg == "--read-log" || arg == "-l")
op = opReadLog;
else if (arg == "--register-substitutes")
op = opRegisterSubstitutes;
else if (arg == "--clear-substitutes")
op = opClearSubstitutes;
else if (arg == "--register-validity")
op = opRegisterValidity;
else if (arg == "--check-validity")