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* Get Fix and Nix to work again.

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This commit is contained in:
Eelco Dolstra 2003-07-15 22:28:27 +00:00
parent 7b3f44e05b
commit d41d085b77
6 changed files with 93 additions and 268 deletions
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45
src/fix.cc
View file

@ -107,11 +107,10 @@ static Expr evalExpr(Expr e)
/* Normal forms. */
if (ATmatch(e, "<str>", &s1) ||
ATmatch(e, "Function([<list>], <term>)", &e1, &e2))
ATmatch(e, "Function([<list>], <term>)", &e1, &e2) ||
ATmatch(e, "FSId(<str>)", &s1))
return e;
if (fstatePath(e) != "") return e; /* !!! hack */
/* Application. */
if (ATmatch(e, "App(<term>, [<list>])", &e1, &e2)) {
e1 = evalExpr(e1);
@ -130,10 +129,12 @@ static Expr evalExpr(Expr e)
if (ATmatch(e, "Relative(<str>)", &s1)) {
string srcPath = searchPath(s1);
string dstPath;
Hash hash;
addToStore(srcPath, dstPath, hash, true);
return ATmake("Path(<str>, Hash(<str>), [])",
dstPath.c_str(), ((string) hash).c_str());
FSId id;
addToStore(srcPath, dstPath, id, true);
FState fs = ATmake("Slice([<str>], [(<str>, <str>, [])])",
((string) id).c_str(), dstPath.c_str(), ((string) id).c_str());
return ATmake("FSId(<str>)",
((string) writeTerm(fs, "", 0)).c_str());
}
/* Packages are transformed into Derive fstate expressions. */
@ -160,10 +161,13 @@ static Expr evalExpr(Expr e)
{
string key = it->first;
ATerm value = it->second;
char * id;
string path = fstatePath(value);
if (path != "") {
ins = ATinsert(ins, value);
if (ATmatch(value, "FSId(<str>)", &id)) {
Strings paths = fstatePaths(parseHash(id));
if (paths.size() != 1) abort();
string path = *(paths.begin());
ins = ATinsert(ins, ATmake("<str>", id));
env = ATinsert(env, ATmake("(<str>, <str>)",
key.c_str(), path.c_str()));
if (key == "build") builder = path;
@ -182,7 +186,7 @@ static Expr evalExpr(Expr e)
/* Hash the normal form to produce a unique but deterministic
path name for this package. */
ATerm nf = ATmake("Package(<term>)", ATreverse(bnds));
Hash hash = hashTerm(nf);
FSId outId = hashTerm(nf);
if (builder == "")
throw badTerm("no builder specified", nf);
@ -190,19 +194,20 @@ static Expr evalExpr(Expr e)
if (name == "")
throw badTerm("no package name specified", nf);
string out =
canonPath(nixStore + "/" + ((string) hash).c_str() + "-" + name);
string outPath =
canonPath(nixStore + "/" + ((string) outId).c_str() + "-" + name);
env = ATinsert(env, ATmake("(<str>, <str>)", "out", out.c_str()));
env = ATinsert(env, ATmake("(<str>, <str>)", "out", outPath.c_str()));
/* Construct the result. */
e = ATmake("Derive(<str>, <str>, <term>, <str>, <term>)",
SYSTEM, builder.c_str(), ins, out.c_str(), env);
FState fs =
ATmake("Derive([(<str>, <str>)], <term>, <str>, <str>, <term>)",
outPath.c_str(), ((string) outId).c_str(),
ins, builder.c_str(), SYSTEM, env);
/* Write the resulting term into the Nix store directory. */
Hash eHash = writeTerm(e, "-d-" + name);
return ATmake("Include(<str>)", ((string) eHash).c_str());
return ATmake("FSId(<str>)",
((string) writeTerm(fs, "-d-" + name, 0)).c_str());
}
/* BaseName primitive function. */
@ -258,7 +263,7 @@ void run(Strings args)
{
Expr e = evalFile(*it);
char * s;
if (ATmatch(e, "Include(<str>)", &s)) {
if (ATmatch(e, "FSId(<str>)", &s)) {
cout << format("%1%\n") % s;
}
else throw badTerm("top level is not a package", e);

265
src/fstate.cc
View file

@ -194,228 +194,6 @@ static FSId storeSuccessor(const FSId & id1, FState sc)
}
#if 0
static FState realise(FState fs, StringSet & paths)
{
char * s1, * s2, * s3;
Content content;
ATermList refs, ins, bnds;
/* First repeatedly try to substitute $fs$ by any known successors
in order to speed up the rewrite process. */
{
string fsHash, scHash;
while (queryDB(nixDB, dbSuccessors, fsHash = hashTerm(fs), scHash)) {
debug(format("successor %1% -> %2%") % (string) fsHash % scHash);
string path;
FState fs2 = termFromHash(parseHash(scHash), &path);
paths.insert(path);
if (fs == fs2) {
debug(format("successor cycle detected in %1%") % printTerm(fs));
break;
}
fs = fs2;
}
}
/* Fall through. */
if (ATmatch(fs, "Include(<str>)", &s1)) {
string path;
fs = termFromHash(parseHash(s1), &path);
paths.insert(path);
return realise(fs, paths);
}
else if (ATmatch(fs, "Path(<str>, <term>, [<list>])", &s1, &content, &refs)) {
string path(s1);
msg(format("realising atomic path %1%") % path);
Nest nest(true);
if (path[0] != '/')
throw Error(format("path `%1% is not absolute") % path);
/* Realise referenced paths. */
ATermList refs2 = ATempty;
while (!ATisEmpty(refs)) {
refs2 = ATinsert(refs2, realise(ATgetFirst(refs), paths));
refs = ATgetNext(refs);
}
refs2 = ATreverse(refs2);
if (!ATmatch(content, "Hash(<str>)", &s1))
throw badTerm("hash expected", content);
Hash hash = parseHash(s1);
/* Normal form. */
ATerm nf = ATmake("Path(<str>, <term>, <term>)",
path.c_str(), content, refs2);
/* Register the normal form. */
nf = storeSuccessor(fs, nf, paths);
/* Expand the hash into the target path. */
expandHash(hash, path);
return nf;
}
else if (ATmatch(fs, "Derive(<str>, <str>, [<list>], <str>, [<list>])",
&s1, &s2, &ins, &s3, &bnds))
{
string platform(s1), builder(s2), outPath(s3);
msg(format("realising derivate path %1%") % outPath);
Nest nest(true);
checkPlatform(platform);
/* Realise inputs. */
Strings inPaths;
ATermList ins2 = ATempty;
while (!ATisEmpty(ins)) {
FState in = realise(ATgetFirst(ins), paths);
inPaths.push_back(fstatePath(in));
ins2 = ATinsert(ins2, in);
ins = ATgetNext(ins);
}
ins = ATreverse(ins2);
/* Build the environment. */
Environment env;
while (!ATisEmpty(bnds)) {
ATerm bnd = ATgetFirst(bnds);
if (!ATmatch(bnd, "(<str>, <str>)", &s1, &s2))
throw badTerm("tuple of strings expected", bnd);
env[s1] = s2;
bnds = ATgetNext(bnds);
}
/* Check whether the target already exists. */
if (pathExists(outPath))
deleteFromStore(outPath);
// throw Error(format("path %1% already exists") % outPath);
/* Run the builder. */
runProgram(builder, env);
/* Check whether the result was created. */
if (!pathExists(outPath))
throw Error(format("program %1% failed to create a result in %2%")
% builder % outPath);
#if 0
/* Remove write permission from the value. */
int res = system(("chmod -R -w " + targetPath).c_str()); // !!! escaping
if (WEXITSTATUS(res) != 0)
throw Error("cannot remove write permission from " + targetPath);
#endif
/* Hash the result. */
Hash outHash = hashPath(outPath);
/* Register targetHash -> targetPath. !!! this should be in
values.cc. */
registerPath(outPath, outHash);
/* Filter out inputs that are not referenced in the output. */
for (Strings::iterator i = inPaths.begin();
i != inPaths.end(); i++)
debug(format("in: %1%") % *i);
Strings outPaths = filterReferences(outPath, inPaths);
for (Strings::iterator i = outPaths.begin();
i != outPaths.end(); i++)
debug(format("out: %1%") % *i);
ins2 = ATempty;
while (!ATisEmpty(ins)) {
FState in = ATgetFirst(ins);
string path = fstatePath(in);
for (Strings::iterator i = outPaths.begin();
i != outPaths.end(); i++)
if (path.find(*i) != string::npos) {
debug(format("out2: %1%") % path);
ins2 = ATinsert(ins2, in);
}
ins = ATgetNext(ins);
}
ins = ATreverse(ins2);
/* Register the normal form of fs. */
FState nf = ATmake("Path(<str>, Hash(<str>), <term>)",
outPath.c_str(), ((string) outHash).c_str(), ins);
nf = storeSuccessor(fs, nf, paths);
return nf;
}
throw badTerm("bad fstate expression", fs);
}
FState realiseFState(FState fs, StringSet & paths)
{
return realise(fs, paths);
}
string fstatePath(FState fs)
{
char * s1, * s2, * s3;
FState e1, e2;
if (ATmatch(fs, "Path(<str>, <term>, [<list>])", &s1, &e1, &e2))
return s1;
else if (ATmatch(fs, "Derive(<str>, <str>, [<list>], <str>, [<list>])",
&s1, &s2, &e1, &s3, &e2))
return s3;
else if (ATmatch(fs, "Include(<str>)", &s1))
return fstatePath(termFromHash(parseHash(s1)));
else
return "";
}
void fstateRefs2(FState fs, StringSet & paths)
{
char * s1, * s2, * s3;
FState e1, e2;
ATermList refs, ins;
if (ATmatch(fs, "Path(<str>, <term>, [<list>])", &s1, &e1, &refs)) {
paths.insert(s1);
while (!ATisEmpty(refs)) {
fstateRefs2(ATgetFirst(refs), paths);
refs = ATgetNext(refs);
}
}
else if (ATmatch(fs, "Derive(<str>, <str>, [<list>], <str>, [<list>])",
&s1, &s2, &ins, &s3, &e2))
{
while (!ATisEmpty(ins)) {
fstateRefs2(ATgetFirst(ins), paths);
ins = ATgetNext(ins);
}
}
else if (ATmatch(fs, "Include(<str>)", &s1))
fstateRefs2(termFromHash(parseHash(s1)), paths);
else throw badTerm("bad fstate expression", fs);
}
void fstateRefs(FState fs, StringSet & paths)
{
fstateRefs2(fs, paths);
}
#endif
static void parseIds(ATermList ids, FSIds & out)
{
while (!ATisEmpty(ids)) {
@ -424,7 +202,6 @@ static void parseIds(ATermList ids, FSIds & out)
if (!ATmatch(id, "<str>", &s))
throw badTerm("not an id", id);
out.push_back(parseHash(s));
debug(s);
ids = ATgetNext(ids);
}
}
@ -691,3 +468,45 @@ void realiseSlice(const Slice & slice)
expandId(elem.id, elem.path);
}
}
Strings fstatePaths(FSId id)
{
Strings paths;
FState fs = termFromId(id);
ATermList outs, ins, bnds;
char * builder;
char * platform;
if (ATgetType(fs) == AT_APPL &&
(string) ATgetName(ATgetAFun(fs)) == "Slice")
{
Slice slice = parseSlice(fs);
/* !!! fix complexity */
for (FSIds::const_iterator i = slice.roots.begin();
i != slice.roots.end(); i++)
for (SliceElems::const_iterator j = slice.elems.begin();
j != slice.elems.end(); j++)
if (*i == j->id) paths.push_back(j->path);
}
else if (ATmatch(fs, "Derive([<list>], [<list>], <str>, <str>, [<list>])",
&outs, &ins, &builder, &platform, &bnds))
{
while (!ATisEmpty(outs)) {
ATerm t = ATgetFirst(outs);
char * s1, * s2;
if (!ATmatch(t, "(<str>, <str>)", &s1, &s2))
throw badTerm("string expected", t);
paths.push_back(s1);
outs = ATgetNext(outs);
}
}
else throw badTerm("in fstatePaths", fs);
return paths;
}

2
src/fstate.hh
View file

@ -115,5 +115,7 @@ Slice normaliseFState(FSId id);
/* Realise a Slice in the file system. */
void realiseSlice(const Slice & slice);
Strings fstatePaths(FSId id);
#endif /* !__FSTATE_H */

4
src/hash.cc
View file

@ -14,7 +14,7 @@ Hash::Hash()
}
bool Hash::operator == (Hash h2)
bool Hash::operator == (const Hash & h2) const
{
for (unsigned int i = 0; i < hashSize; i++)
if (hash[i] != h2.hash[i]) return false;
@ -22,7 +22,7 @@ bool Hash::operator == (Hash h2)
}
bool Hash::operator != (Hash h2)
bool Hash::operator != (const Hash & h2) const
{
return !(*this == h2);
}

4
src/hash.hh
View file

@ -17,10 +17,10 @@ struct Hash
Hash();
/* Check whether two hash are equal. */
bool operator == (Hash h2);
bool operator == (const Hash & h2) const;
/* Check whether two hash are not equal. */
bool operator != (Hash h2);
bool operator != (const Hash & h2) const;
/* For sorting. */
bool operator < (const Hash & h) const;

39
src/nix.cc
View file

@ -41,7 +41,7 @@ static ArgType argType = atpUnknown;
Source selection for --install, --dump:
--file / -f: by file name !!! -> path
--hash / -h: by hash
--hash / -h: by hash (identifier)
Query flags:
@ -76,15 +76,15 @@ static void getArgType(Strings & flags)
}
static Hash argToHash(const string & arg)
static FSId argToId(const string & arg)
{
if (argType == atpHash)
return parseHash(arg);
else if (argType == atpPath) {
string path;
Hash hash;
addToStore(arg, path, hash);
return hash;
FSId id;
addToStore(arg, path, id);
return id;
}
else abort();
}
@ -99,10 +99,7 @@ static void opInstall(Strings opFlags, Strings opArgs)
for (Strings::iterator it = opArgs.begin();
it != opArgs.end(); it++)
{
StringSet paths;
realiseFState(hash2fstate(argToHash(*it)), paths);
}
realiseSlice(normaliseFState(argToId(*it)));
}
@ -128,9 +125,9 @@ static void opAdd(Strings opFlags, Strings opArgs)
it != opArgs.end(); it++)
{
string path;
Hash hash;
addToStore(*it, path, hash);
cout << format("%1% %2%\n") % (string) hash % path;
FSId id;
addToStore(*it, path, id);
cout << format("%1% %2%\n") % (string) id % path;
}
}
@ -156,10 +153,11 @@ static void opQuery(Strings opFlags, Strings opArgs)
for (Strings::iterator it = opArgs.begin();
it != opArgs.end(); it++)
{
Hash hash = argToHash(*it);
FSId id = argToId(*it);
switch (query) {
#if 0
case qPath: {
StringSet refs;
cout << format("%s\n") %
@ -176,6 +174,7 @@ static void opQuery(Strings opFlags, Strings opArgs)
cout << format("%s\n") % *j;
break;
}
#endif
default:
abort();
@ -192,9 +191,9 @@ static void opSuccessor(Strings opFlags, Strings opArgs)
for (Strings::iterator i = opArgs.begin();
i != opArgs.end(); )
{
Hash fsHash = parseHash(*i++);
Hash scHash = parseHash(*i++);
registerSuccessor(fsHash, scHash);
FSId id1 = parseHash(*i++);
FSId id2 = parseHash(*i++);
registerSuccessor(id1, id2);
}
}
@ -207,9 +206,9 @@ static void opSubstitute(Strings opFlags, Strings opArgs)
for (Strings::iterator i = opArgs.begin();
i != opArgs.end(); )
{
Hash srcHash = parseHash(*i++);
Hash subHash = parseHash(*i++);
registerSubstitute(srcHash, subHash);
FSId src = parseHash(*i++);
FSId sub = parseHash(*i++);
registerSubstitute(src, sub);
}
}
@ -238,7 +237,7 @@ static void opDump(Strings opFlags, Strings opArgs)
string arg = *opArgs.begin();
string path;
if (argType == atpHash) path = expandHash(parseHash(arg));
if (argType == atpHash) path = expandId(parseHash(arg));
else if (argType == atpPath) path = arg;
dumpPath(path, sink);