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Cancel multiline input on Ctrl-C.

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This commit is contained in:
Scott Olson 2016-02-18 06:50:52 -06:00
parent 2d729e4f6f
commit 64080d26fe
1 changed files with 9 additions and 11 deletions
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20
nix-repl.cc
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@ -41,7 +41,7 @@ struct NixRepl
NixRepl(const Strings & searchPath);
void mainLoop(const Strings & files);
void completePrefix(string prefix);
bool getLine(string & line, const char * prompt);
bool getLine(string & input, const char * prompt);
bool processLine(string line);
void loadFile(const Path & path);
void initEnv();
@ -102,15 +102,11 @@ void NixRepl::mainLoop(const Strings & files)
// When continuing input from a previous, don't print a prompt, just align to the same
// number of chars as the prompt.
const char * prompt = input.empty() ? "nix-repl> " : " ";
string line;
if (!getLine(line, prompt)) {
if (!getLine(input, prompt)) {
std::cout << std::endl;
break;
}
input.append(removeWhitespace(line));
input.push_back('\n');
try {
if (!processLine(input)) return;
} catch (ParseError & e) {
@ -167,7 +163,7 @@ char * completerThunk(const char * s, int state)
}
bool NixRepl::getLine(string & line, const char * prompt)
bool NixRepl::getLine(string & input, const char * prompt)
{
struct sigaction act, old;
act.sa_handler = sigintHandler;
@ -176,15 +172,17 @@ bool NixRepl::getLine(string & line, const char * prompt)
if (sigaction(SIGINT, &act, &old))
throw SysError("installing handler for SIGINT");
if (sigsetjmp(sigintJmpBuf, 1))
line = "";
else {
if (sigsetjmp(sigintJmpBuf, 1)) {
input.clear();
} else {
curRepl = this;
rl_completion_entry_function = completerThunk;
char * s = readline(prompt);
if (!s) return false;
line = chomp(string(s));
string line = chomp(string(s));
input.append(removeWhitespace(line));
input.push_back('\n');
free(s);
if (line != "") {
add_history(line.c_str());