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* Refactoring: hash class.

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This commit is contained in:
Eelco Dolstra 2003-06-15 13:41:32 +00:00
parent f66055fa1e
commit 21fe717ce2
8 changed files with 266 additions and 184 deletions
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39
src/fix.cc
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@ -10,6 +10,7 @@ extern "C" {
}
#include "util.hh"
#include "hash.hh"
static string nixDescriptorDir;
@ -20,7 +21,7 @@ static bool verbose = false;
/* Mapping of Fix file names to the hashes of the resulting Nix
descriptors. */
typedef map<string, string> DescriptorMap;
typedef map<string, Hash> DescriptorMap;
void registerFile(string filename)
@ -32,12 +33,13 @@ void registerFile(string filename)
}
void registerURL(string hash, string url)
void registerURL(Hash hash, string url)
{
int res = system(("nix regurl " + hash + " " + url).c_str());
int res = system(("nix regurl " + (string) hash + " " + url).c_str());
/* !!! escape */
if (WEXITSTATUS(res) != 0)
throw Error("cannot register " + hash + " -> " + url + " with Nix");
throw Error("cannot register " +
(string) hash + " -> " + url + " with Nix");
}
@ -61,7 +63,7 @@ struct EvalContext
ATerm evaluate(ATerm e, EvalContext ctx);
string instantiateDescriptor(string filename, EvalContext ctx);
Hash instantiateDescriptor(string filename, EvalContext ctx);
string evaluateStr(ATerm e, EvalContext ctx)
@ -101,7 +103,7 @@ ATerm evaluate(ATerm e, EvalContext ctx)
ATmatch(e, "Pkg(<str>)", &s) ||
ATmatch(e, "File(<str>)", &s))
{
checkHash(s);
parseHash(s);
return e;
}
@ -131,7 +133,7 @@ ATerm evaluate(ATerm e, EvalContext ctx)
else if (ATmatch(e, "Fix(<term>)", &e2)) {
string filename = absPath(evaluateStr(e2, ctx), ctx.dir); /* !!! */
return ATmake("Pkg(<str>)",
instantiateDescriptor(filename, ctx).c_str());
((string) instantiateDescriptor(filename, ctx)).c_str());
}
#if 0
@ -160,19 +162,18 @@ ATerm evaluate(ATerm e, EvalContext ctx)
hash. */
else if (ATmatch(e, "Local(<term>)", &e2)) {
string filename = absPath(evaluateStr(e2, ctx), ctx.dir); /* !!! */
string hash = hashFile(filename);
Hash hash = hashFile(filename);
registerFile(filename); /* !!! */
return ATmake("File(<str>)", hash.c_str());
return ATmake("File(<str>)", ((string) hash).c_str());
}
/* `Url' registers a mapping from a hash to an url with Nix, and
returns the hash. */
else if (ATmatch(e, "Url(<term>, <term>)", &e2, &e3)) {
string hash = evaluateStr(e2, ctx);
checkHash(hash);
Hash hash = parseHash(evaluateStr(e2, ctx));
string url = evaluateStr(e3, ctx);
registerURL(hash, url);
return ATmake("File(<str>)", hash.c_str());
return ATmake("File(<str>)", ((string) hash).c_str());
}
/* `If' provides conditional evaluation. */
@ -199,7 +200,7 @@ string getStringFromMap(BindingsMap & bindingsMap,
/* Instantiate a Fix descriptors into a Nix descriptor, recursively
instantiating referenced descriptors as well. */
string instantiateDescriptor(string filename, EvalContext ctx)
Hash instantiateDescriptor(string filename, EvalContext ctx)
{
/* Already done? */
DescriptorMap::iterator isInMap = ctx.done->find(filename);
@ -256,8 +257,9 @@ string instantiateDescriptor(string filename, EvalContext ctx)
if (!ATwriteToNamedTextFile(outTerm, tmpFilename.c_str()))
throw Error("cannot write aterm to " + tmpFilename);
string outHash = hashFile(tmpFilename);
string outFilename = nixDescriptorDir + "/" + id + "-" + outHash + ".nix";
Hash outHash = hashFile(tmpFilename);
string outFilename = nixDescriptorDir + "/" +
id + "-" + (string) outHash + ".nix";
if (rename(tmpFilename.c_str(), outFilename.c_str()))
throw Error("cannot rename " + tmpFilename + " to " + outFilename);
@ -265,7 +267,8 @@ string instantiateDescriptor(string filename, EvalContext ctx)
registerFile(outFilename);
if (verbose)
cerr << "instantiated " << outHash << " from " << filename << endl;
cerr << "instantiated " << (string) outHash
<< " from " << filename << endl;
(*ctx.done)[filename] = outHash;
return outHash;
@ -284,7 +287,7 @@ void instantiateDescriptors(Strings filenames)
it != filenames.end(); it++)
{
string filename = absPath(*it);
cout << instantiateDescriptor(filename, ctx) << endl;
cout << (string) instantiateDescriptor(filename, ctx) << endl;
}
}
@ -293,7 +296,7 @@ void instantiateDescriptors(Strings filenames)
void printUsage()
{
cerr <<
"Usage: fix ...
"Usage: fix ...\n\
";
}