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Add :reload command

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This commit is contained in:
Eelco Dolstra 2013-09-09 16:02:46 +02:00
parent ddd22c37c5
commit adde4f0c8d
1 changed files with 33 additions and 8 deletions
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41
nix-repl.cc
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@ -27,6 +27,8 @@ struct NixRepl
string curDir;
EvalState state;
Strings loadedFiles;
StaticEnv staticEnv;
Env * env;
int displ;
@ -41,6 +43,7 @@ struct NixRepl
bool getLine(string & line);
bool processLine(string line);
void loadFile(const Path & path);
void reloadFiles();
void addAttrsToScope(Value & attrs);
void addVarToScope(const Symbol & name, Value & v);
Expr * parseString(string s);
@ -84,9 +87,11 @@ void NixRepl::mainLoop(const Strings & args)
{
std::cout << "Welcome to Nix version " << NIX_VERSION << ". Type :? for help." << std::endl << std::endl;
foreach (Strings::const_iterator, i, args) {
std::cout << format("Loading ‘%1%’...") % *i << std::endl;
loadFile(*i);
foreach (Strings::const_iterator, i, args)
loadedFiles.push_back(*i);
if (!loadedFiles.empty()) {
reloadFiles();
std::cout << std::endl;
}
@ -110,7 +115,6 @@ void NixRepl::mainLoop(const Strings & args)
std::cout << std::endl;
}
}
@ -271,7 +275,7 @@ bool NixRepl::processLine(string line)
arg = line;
}
if (command == ":?") {
if (command == ":?" || command == ":help") {
cout << "The following commands are available:\n"
<< "\n"
<< " <expr> Evaluate and print expression\n"
@ -281,21 +285,27 @@ bool NixRepl::processLine(string line)
<< " :l <path> Load Nix expression and add it to scope\n"
<< " :p <expr> Evaluate and print expression recursively\n"
<< " :q Exit nix-repl\n"
<< " :r Reload all files\n"
<< " :s <expr> Build dependencies of derivation, then start nix-shell\n"
<< " :t <expr> Describe result of evaluation\n";
}
else if (command == ":a") {
else if (command == ":a" || command == ":add") {
Value v;
evalString(arg, v);
addAttrsToScope(v);
}
else if (command == ":l") {
else if (command == ":l" || command == ":load") {
state.resetFileCache();
loadFile(arg);
}
else if (command == ":r" || command == ":reload") {
state.resetFileCache();
reloadFiles();
}
else if (command == ":t") {
Value v;
evalString(arg, v);
@ -326,7 +336,7 @@ bool NixRepl::processLine(string line)
runProgram("nix-shell", Strings{drvPath});
}
else if (command == ":p") {
else if (command == ":p" || command == ":print") {
Value v;
evalString(arg, v);
printValue(std::cout, v, 1000000000) << std::endl;
@ -363,6 +373,8 @@ bool NixRepl::processLine(string line)
void NixRepl::loadFile(const Path & path)
{
loadedFiles.remove(path);
loadedFiles.push_back(path);
Value v, v2;
state.evalFile(lookupFileArg(state, path), v);
Bindings bindings;
@ -371,6 +383,19 @@ void NixRepl::loadFile(const Path & path)
}
void NixRepl::reloadFiles()
{
Strings old = loadedFiles;
loadedFiles.clear();
foreach (Strings::iterator, i, old) {
if (i != old.begin()) std::cout << std::endl;
std::cout << format("Loading ‘%1%’...") % *i << std::endl;
loadFile(*i);
}
}
void NixRepl::addAttrsToScope(Value & attrs)
{
state.forceAttrs(attrs);