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Merge pull request #1896 from boqwxp/read_stdin_repl 

Frontend: allow reading file input from stdin, like a REPL heredoc mode
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whitequark 2020-04-16 17:18:29 +00:00 committed by GitHub
parent 7a434cdd7b 76c9e1c265
commit c2804a68c2
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 4 additions and 3 deletions
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7
kernel/register.cc
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@ -485,20 +485,21 @@ void Frontend::extra_args(std::istream *&f, std::string &filename, std::vector<s
cmd_error(args, argidx, "Extra filename argument in direct file mode.");
filename = arg;
//Accommodate heredocs with EOT marker spaced out from "<<", e.g. "<< EOT" vs. "<<EOT"
if (filename == "<<" && argidx+1 < args.size())
filename += args[++argidx];
if (filename.compare(0, 2, "<<") == 0) {
if (Frontend::current_script_file == NULL)
log_error("Unexpected here document '%s' outside of script!\n", filename.c_str());
if (filename.size() <= 2)
log_error("Missing EOT marker in here document!\n");
std::string eot_marker = filename.substr(2);
if (Frontend::current_script_file == nullptr)
filename = "<stdin>";
last_here_document.clear();
while (1) {
std::string buffer;
char block[4096];
while (1) {
if (fgets(block, 4096, Frontend::current_script_file) == NULL)
if (fgets(block, 4096, Frontend::current_script_file == nullptr? stdin : Frontend::current_script_file) == nullptr)
log_error("Unexpected end of file in here document '%s'!\n", filename.c_str());
buffer += block;
if (buffer.size() > 0 && (buffer[buffer.size() - 1] == '\n' || buffer[buffer.size() - 1] == '\r'))