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* Realisation of File(...) expressions.

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This commit is contained in:
Eelco Dolstra 2003-06-27 13:55:12 +00:00
parent bb03c45ca0
commit 3da9687854
11 changed files with 137 additions and 368 deletions
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50
src/values.cc
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@ -34,7 +34,7 @@ struct CopySource : RestoreSource
};
static void copyFile(string src, string dst)
void copyFile(string src, string dst)
{
/* Unfortunately C++ doesn't support coprocedures, so we have no
nice way to chain CopySink and CopySource together. Instead we
@ -83,33 +83,25 @@ static void copyFile(string src, string dst)
}
static string absValuePath(string s)
void addToStore(string srcPath, string & dstPath, Hash & hash)
{
return nixValues + "/" + s;
}
srcPath = absPath(srcPath);
hash = hashPath(srcPath);
Hash addValue(string path)
{
path = absPath(path);
Hash hash = hashPath(path);
string name;
if (queryDB(nixDB, dbRefs, hash, name)) {
string path;
if (queryDB(nixDB, dbRefs, hash, path)) {
debug((string) hash + " already known");
return hash;
dstPath = path;
return;
}
string baseName = baseNameOf(path);
string targetName = (string) hash + "-" + baseName;
string baseName = baseNameOf(srcPath);
dstPath = nixStore + "/" + (string) hash + "-" + baseName;
copyFile(path, absValuePath(targetName));
copyFile(srcPath, dstPath);
setDB(nixDB, dbRefs, hash, targetName);
return hash;
setDB(nixDB, dbRefs, hash, dstPath);
}
@ -135,28 +127,28 @@ string fetchURL(string url)
#endif
void deleteValue(Hash hash)
void deleteFromStore(Hash hash)
{
string name;
if (queryDB(nixDB, dbRefs, hash, name)) {
string fn = absValuePath(name);
string fn;
if (queryDB(nixDB, dbRefs, hash, fn)) {
string prefix = nixStore + "/";
if (string(fn, prefix.size()) != prefix)
throw Error("path " + fn + " is not in the store");
deletePath(fn);
delDB(nixDB, dbRefs, hash);
}
}
/* !!! bad name, "query" implies no side effect => getValuePath() */
string queryValuePath(Hash hash)
string queryFromStore(Hash hash)
{
bool checkedNet = false;
while (1) {
string name, url;
string fn, url;
if (queryDB(nixDB, dbRefs, hash, name)) {
string fn = absValuePath(name);
if (queryDB(nixDB, dbRefs, hash, fn)) {
/* Verify that the file hasn't changed. !!! race !!! slow */
if (hashPath(fn) != hash)