* Minor refactoring: use iterators to process arguments.
This commit is contained in:
Eelco Dolstra
parent
c68dca5dac
commit
ab723e341a
159
src/nix.cc
159
src/nix.cc
|
|
@ -70,6 +70,9 @@ public:
|
|||
};
|
||||
|
||||
|
||||
typedef vector<string> Strings;
|
||||
|
||||
|
||||
/* Wrapper classes that ensures that the database is closed upon
|
||||
object destruction. */
|
||||
class Db2 : public Db
|
||||
|
|
@ -427,7 +430,9 @@ string getPkg(string hash)
|
|||
}
|
||||
|
||||
|
||||
void runPkg(string hash, const vector<string> & args)
|
||||
void runPkg(string hash,
|
||||
Strings::iterator firstArg,
|
||||
Strings::iterator lastArg)
|
||||
{
|
||||
string src;
|
||||
string path;
|
||||
|
|
@ -453,8 +458,7 @@ void runPkg(string hash, const vector<string> & args)
|
|||
const char * args2[env.size() + 2];
|
||||
int i = 0;
|
||||
args2[i++] = runner.c_str();
|
||||
for (vector<string>::const_iterator it = args.begin();
|
||||
it != args.end(); it++, i++)
|
||||
for (Strings::const_iterator it = firstArg; it != lastArg; it++, i++)
|
||||
args2[i] = it->c_str();
|
||||
args2[i] = 0;
|
||||
|
||||
|
|
@ -493,11 +497,11 @@ void delPkg(string hash)
|
|||
}
|
||||
|
||||
|
||||
void exportPkgs(string outDir, vector<string> hashes)
|
||||
void exportPkgs(string outDir,
|
||||
Strings::iterator firstHash,
|
||||
Strings::iterator lastHash)
|
||||
{
|
||||
for (vector<string>::iterator it = hashes.begin();
|
||||
it != hashes.end(); it++)
|
||||
{
|
||||
for (Strings::iterator it = firstHash; it != lastHash; it++) {
|
||||
string hash = *it;
|
||||
string pkgDir = getPkg(hash);
|
||||
string tmpFile = outDir + "/export_tmp";
|
||||
|
|
@ -616,10 +620,9 @@ void listInstalledPkgs()
|
|||
}
|
||||
|
||||
|
||||
void printInfo(vector<string> hashes)
|
||||
void printInfo(Strings::iterator first, Strings::iterator last)
|
||||
{
|
||||
for (vector<string>::iterator it = hashes.begin();
|
||||
it != hashes.end(); it++)
|
||||
for (Strings::iterator it = first; it != last; it++)
|
||||
{
|
||||
try {
|
||||
cout << *it << " " << queryPkgId(*it) << endl;
|
||||
|
|
@ -630,10 +633,10 @@ void printInfo(vector<string> hashes)
|
|||
}
|
||||
|
||||
|
||||
void computeClosure(const vector<string> & rootHashes,
|
||||
void computeClosure(Strings::iterator first, Strings::iterator last,
|
||||
set<string> & result)
|
||||
{
|
||||
list<string> workList(rootHashes.begin(), rootHashes.end());
|
||||
list<string> workList(first, last);
|
||||
set<string> doneSet;
|
||||
|
||||
while (!workList.empty()) {
|
||||
|
|
@ -656,10 +659,10 @@ void computeClosure(const vector<string> & rootHashes,
|
|||
}
|
||||
|
||||
|
||||
void printClosure(const vector<string> & rootHashes)
|
||||
void printClosure(Strings::iterator first, Strings::iterator last)
|
||||
{
|
||||
set<string> allHashes;
|
||||
computeClosure(rootHashes, allHashes);
|
||||
computeClosure(first, last, allHashes);
|
||||
for (set<string>::iterator it = allHashes.begin();
|
||||
it != allHashes.end(); it++)
|
||||
cout << *it << endl;
|
||||
|
|
@ -672,10 +675,10 @@ string dotQuote(const string & s)
|
|||
}
|
||||
|
||||
|
||||
void printGraph(vector<string> rootHashes)
|
||||
void printGraph(Strings::iterator first, Strings::iterator last)
|
||||
{
|
||||
set<string> allHashes;
|
||||
computeClosure(rootHashes, allHashes);
|
||||
computeClosure(first, last, allHashes);
|
||||
|
||||
cout << "digraph G {\n";
|
||||
|
||||
|
|
@ -699,58 +702,8 @@ void printGraph(vector<string> rootHashes)
|
|||
}
|
||||
|
||||
|
||||
void run(vector<string> args)
|
||||
void run(Strings args)
|
||||
{
|
||||
UsageError argcError("wrong number of arguments");
|
||||
string cmd;
|
||||
|
||||
if (args.size() < 1) throw UsageError("no command specified");
|
||||
|
||||
cmd = args[0];
|
||||
args.erase(args.begin()); // O(n)
|
||||
|
||||
if (cmd == "init") {
|
||||
if (args.size() != 0) throw argcError;
|
||||
initDB();
|
||||
} else if (cmd == "verify") {
|
||||
if (args.size() != 0) throw argcError;
|
||||
verifyDB();
|
||||
} else if (cmd == "getpkg") {
|
||||
if (args.size() != 1) throw argcError;
|
||||
string path = getPkg(args[0]);
|
||||
cout << path << endl;
|
||||
} else if (cmd == "delpkg") {
|
||||
if (args.size() != 1) throw argcError;
|
||||
delPkg(args[0]);
|
||||
} else if (cmd == "run") {
|
||||
if (args.size() < 1) throw argcError;
|
||||
runPkg(args[0], vector<string>(args.begin() + 1, args.end()));
|
||||
} else if (cmd == "ensure") {
|
||||
if (args.size() != 1) throw argcError;
|
||||
ensurePkg(args[0]);
|
||||
} else if (cmd == "export") {
|
||||
if (args.size() < 1) throw argcError;
|
||||
exportPkgs(args[0], vector<string>(args.begin() + 1, args.end()));
|
||||
} else if (cmd == "regprebuilt") {
|
||||
if (args.size() != 2) throw argcError;
|
||||
regPrebuilt(args[0], args[1]);
|
||||
} else if (cmd == "regfile") {
|
||||
if (args.size() != 1) throw argcError;
|
||||
registerFile(args[0]);
|
||||
} else if (cmd == "reginst") {
|
||||
if (args.size() != 2) throw argcError;
|
||||
registerInstalledPkg(args[0], args[1]);
|
||||
} else if (cmd == "listinst") {
|
||||
if (args.size() != 0) throw argcError;
|
||||
listInstalledPkgs();
|
||||
} else if (cmd == "info") {
|
||||
printInfo(args);
|
||||
} else if (cmd == "closure") {
|
||||
printClosure(args);
|
||||
} else if (cmd == "graph") {
|
||||
printGraph(args);
|
||||
} else
|
||||
throw UsageError("unknown command: " + string(cmd));
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -810,7 +763,7 @@ Subcommands:
|
|||
}
|
||||
|
||||
|
||||
void main2(int argc, char * * argv)
|
||||
void run(Strings::iterator argCur, Strings::iterator argEnd)
|
||||
{
|
||||
umask(0022);
|
||||
|
||||
|
|
@ -821,8 +774,8 @@ void main2(int argc, char * * argv)
|
|||
pkgHome = getenv(PKGHOME_ENVVAR);
|
||||
|
||||
/* Parse the global flags. */
|
||||
while (argc) {
|
||||
string arg(*argv);
|
||||
for ( ; argCur != argEnd; argCur++) {
|
||||
string arg(*argCur);
|
||||
if (arg == "-h" || arg == "--help") {
|
||||
printUsage();
|
||||
return;
|
||||
|
|
@ -831,13 +784,57 @@ void main2(int argc, char * * argv)
|
|||
} else if (arg[0] == '-') {
|
||||
throw UsageError("invalid option `" + arg + "'");
|
||||
} else break;
|
||||
argv++, argc--;
|
||||
}
|
||||
|
||||
/* Put the remainder in a vector and pass it to run2(). */
|
||||
vector<string> args;
|
||||
while (argc--) args.push_back(*argv++);
|
||||
run(args);
|
||||
UsageError argcError("wrong number of arguments");
|
||||
|
||||
/* Parse the command. */
|
||||
if (argCur == argEnd) throw UsageError("no command specified");
|
||||
string cmd = *argCur++;
|
||||
int argc = argEnd - argCur;
|
||||
|
||||
if (cmd == "init") {
|
||||
if (argc != 0) throw argcError;
|
||||
initDB();
|
||||
} else if (cmd == "verify") {
|
||||
if (argc != 0) throw argcError;
|
||||
verifyDB();
|
||||
} else if (cmd == "getpkg") {
|
||||
if (argc != 1) throw argcError;
|
||||
string path = getPkg(*argCur);
|
||||
cout << path << endl;
|
||||
} else if (cmd == "delpkg") {
|
||||
if (argc != 1) throw argcError;
|
||||
delPkg(*argCur);
|
||||
} else if (cmd == "run") {
|
||||
if (argc < 1) throw argcError;
|
||||
runPkg(*argCur, argCur + 1, argEnd);
|
||||
} else if (cmd == "ensure") {
|
||||
if (argc != 1) throw argcError;
|
||||
ensurePkg(*argCur);
|
||||
} else if (cmd == "export") {
|
||||
if (argc < 1) throw argcError;
|
||||
exportPkgs(*argCur, argCur + 1, argEnd);
|
||||
} else if (cmd == "regprebuilt") {
|
||||
if (argc != 2) throw argcError;
|
||||
regPrebuilt(*argCur, argCur[1]);
|
||||
} else if (cmd == "regfile") {
|
||||
if (argc != 1) throw argcError;
|
||||
registerFile(*argCur);
|
||||
} else if (cmd == "reginst") {
|
||||
if (argc != 2) throw argcError;
|
||||
registerInstalledPkg(*argCur, argCur[1]);
|
||||
} else if (cmd == "listinst") {
|
||||
if (argc != 0) throw argcError;
|
||||
listInstalledPkgs();
|
||||
} else if (cmd == "info") {
|
||||
printInfo(argCur, argEnd);
|
||||
} else if (cmd == "closure") {
|
||||
printClosure(argCur, argEnd);
|
||||
} else if (cmd == "graph") {
|
||||
printGraph(argCur, argEnd);
|
||||
} else
|
||||
throw UsageError("unknown command: " + string(cmd));
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -846,17 +843,19 @@ int main(int argc, char * * argv)
|
|||
ATerm bottomOfStack;
|
||||
ATinit(argc, argv, &bottomOfStack);
|
||||
|
||||
prog = *argv++, argc--;
|
||||
/* Put the arguments in a vector. */
|
||||
Strings args;
|
||||
while (argc--) args.push_back(*argv++);
|
||||
Strings::iterator argCur = args.begin(), argEnd = args.end();
|
||||
|
||||
prog = *argCur++;
|
||||
|
||||
try {
|
||||
try {
|
||||
|
||||
main2(argc, argv);
|
||||
|
||||
run(argCur, argEnd);
|
||||
} catch (DbException e) {
|
||||
throw Error(e.what());
|
||||
}
|
||||
|
||||
} catch (UsageError & e) {
|
||||
cerr << "error: " << e.what() << endl
|
||||
<< "Try `nix -h' for more information.\n";
|
||||
|
|
|
|||
Loading…
Reference in New Issue