diff options
Diffstat (limited to 'src/nix/repl.cc')
| -rw-r--r-- | src/nix/repl.cc | 52 |
1 files changed, 14 insertions, 38 deletions
diff --git a/src/nix/repl.cc b/src/nix/repl.cc index 27727bd25..4bcaaeebf 100644 --- a/src/nix/repl.cc +++ b/src/nix/repl.cc @@ -82,40 +82,6 @@ struct NixRepl : gc }; -void printHelp() -{ - std::cout - << "Usage: nix-repl [--help] [--version] [-I path] paths...\n" - << "\n" - << "nix-repl is a simple read-eval-print loop (REPL) for the Nix package manager.\n" - << "\n" - << "Options:\n" - << " --help\n" - << " Prints out a summary of the command syntax and exits.\n" - << "\n" - << " --version\n" - << " Prints out the Nix version number on standard output and exits.\n" - << "\n" - << " -I path\n" - << " Add a path to the Nix expression search path. This option may be given\n" - << " multiple times. See the NIX_PATH environment variable for information on\n" - << " the semantics of the Nix search path. Paths added through -I take\n" - << " precedence over NIX_PATH.\n" - << "\n" - << " paths...\n" - << " A list of paths to files containing Nix expressions which nix-repl will\n" - << " load and add to its scope.\n" - << "\n" - << " A path surrounded in < and > will be looked up in the Nix expression search\n" - << " path, as in the Nix language itself.\n" - << "\n" - << " If an element of paths starts with http:// or https://, it is interpreted\n" - << " as the URL of a tarball that will be downloaded and unpacked to a temporary\n" - << " location. The tarball must include a single top-level directory containing\n" - << " at least a file named default.nix.\n"; -} - - string removeWhitespace(string s) { s = chomp(s); @@ -252,12 +218,12 @@ void NixRepl::mainLoop(const std::vector<std::string> & files) // input without clearing the input so far. continue; } else { - printMsg(lvlError, format(error + "%1%%2%") % (settings.showTrace ? e.prefix() : "") % e.msg()); + printMsg(lvlError, error + "%1%%2%", (settings.showTrace ? e.prefix() : ""), e.msg()); } } catch (Error & e) { - printMsg(lvlError, format(error + "%1%%2%") % (settings.showTrace ? e.prefix() : "") % e.msg()); + printMsg(lvlError, error + "%1%%2%", (settings.showTrace ? e.prefix() : ""), e.msg()); } catch (Interrupted & e) { - printMsg(lvlError, format(error + "%1%%2%") % (settings.showTrace ? e.prefix() : "") % e.msg()); + printMsg(lvlError, error + "%1%%2%", (settings.showTrace ? e.prefix() : ""), e.msg()); } // We handled the current input fully, so we should clear it @@ -546,7 +512,7 @@ bool NixRepl::processLine(string line) return false; else if (command != "") - throw Error(format("unknown command '%1%'") % command); + throw Error("unknown command '%1%'", command); else { size_t p = line.find('='); @@ -809,6 +775,16 @@ struct CmdRepl : StoreCommand, MixEvalArgs return "start an interactive environment for evaluating Nix expressions"; } + Examples examples() override + { + return { + Example{ + "Display all special commands within the REPL:", + "nix repl\n nix-repl> :?" + } + }; + } + void run(ref<Store> store) override { auto repl = std::make_unique<NixRepl>(searchPath, openStore()); |