diff options
Diffstat (limited to 'src/nix')
-rw-r--r-- | src/nix/local.mk | 3 | ||||
-rw-r--r-- | src/nix/repl.cc | 107 |
2 files changed, 77 insertions, 33 deletions
diff --git a/src/nix/local.mk b/src/nix/local.mk index bdcca33d2a6f..40a0e8d6bde1 100644 --- a/src/nix/local.mk +++ b/src/nix/local.mk @@ -4,7 +4,6 @@ nix_DIR := $(d) nix_SOURCES := \ $(wildcard $(d)/*.cc) \ - $(wildcard src/linenoise/*.cpp) \ $(wildcard src/build-remote/*.cc) \ $(wildcard src/nix-build/*.cc) \ $(wildcard src/nix-channel/*.cc) \ @@ -18,7 +17,7 @@ nix_SOURCES := \ nix_LIBS = libexpr libmain libstore libutil libformat -nix_LDFLAGS = -pthread $(SODIUM_LIBS) +nix_LDFLAGS = -pthread $(SODIUM_LIBS) $(EDITLINE_LIBS) $(foreach name, \ nix-build nix-channel nix-collect-garbage nix-copy-closure nix-daemon nix-env nix-hash nix-instantiate nix-prefetch-url nix-shell nix-store, \ diff --git a/src/nix/repl.cc b/src/nix/repl.cc index 77898c632360..ff8477865b5f 100644 --- a/src/nix/repl.cc +++ b/src/nix/repl.cc @@ -1,8 +1,12 @@ #include <iostream> #include <cstdlib> +#include <cstring> +#include <climits> #include <setjmp.h> +#include <editline.h> + #include "shared.hh" #include "eval.hh" #include "eval-inline.hh" @@ -15,8 +19,6 @@ #include "command.hh" #include "finally.hh" -#include "src/linenoise/linenoise.h" - namespace nix { #define ESC_RED "\033[31m" @@ -118,17 +120,71 @@ NixRepl::NixRepl(const Strings & searchPath, nix::ref<Store> store) NixRepl::~NixRepl() { - linenoiseHistorySave(historyFile.c_str()); + write_history(historyFile.c_str()); } - static NixRepl * curRepl; // ugly -static void completionCallback(const char * s, linenoiseCompletions *lc) -{ - /* Otherwise, return all symbols that start with the prefix. */ - for (auto & c : curRepl->completePrefix(s)) - linenoiseAddCompletion(lc, c.c_str()); +static char * completionCallback(char * s, int *match) { + auto possible = curRepl->completePrefix(s); + if (possible.size() == 1) { + *match = 1; + auto *res = strdup(possible.begin()->c_str() + strlen(s)); + if (!res) throw Error("allocation failure"); + return res; + } else if (possible.size() > 1) { + auto checkAllHaveSameAt = [&](size_t pos) { + auto &first = *possible.begin(); + for (auto &p : possible) { + if (p.size() <= pos || p[pos] != first[pos]) + return false; + } + return true; + }; + size_t start = strlen(s); + size_t len = 0; + while (checkAllHaveSameAt(start + len)) ++len; + if (len > 0) { + *match = 1; + auto *res = strdup(std::string(*possible.begin(), start, len).c_str()); + if (!res) throw Error("allocation failure"); + return res; + } + } + + *match = 0; + return nullptr; +} + +static int listPossibleCallback(char *s, char ***avp) { + auto possible = curRepl->completePrefix(s); + + if (possible.size() > (INT_MAX / sizeof(char*))) + throw Error("too many completions"); + + int ac = 0; + char **vp = nullptr; + + auto check = [&](auto *p) { + if (!p) { + if (vp) { + while (--ac >= 0) + free(vp[ac]); + free(vp); + } + throw Error("allocation failure"); + } + return p; + }; + + vp = check((char **)malloc(possible.size() * sizeof(char*))); + + for (auto & p : possible) + vp[ac++] = check(strdup(p.c_str())); + + *avp = vp; + + return ac; } @@ -143,12 +199,16 @@ void NixRepl::mainLoop(const std::vector<std::string> & files) reloadFiles(); if (!loadedFiles.empty()) std::cout << std::endl; + // Allow nix-repl specific settings in .inputrc + rl_readline_name = "nix-repl"; createDirs(dirOf(historyFile)); - linenoiseHistorySetMaxLen(1000); - linenoiseHistoryLoad(historyFile.c_str()); - + el_hist_size = 1000; + read_history(historyFile.c_str()); + // rl_initialize(); + // linenoiseSetCompletionCallback(completionCallback); curRepl = this; - linenoiseSetCompletionCallback(completionCallback); + rl_set_complete_func(completionCallback); + rl_set_list_possib_func(listPossibleCallback); std::string input; @@ -174,12 +234,6 @@ void NixRepl::mainLoop(const std::vector<std::string> & files) printMsg(lvlError, format(error + "%1%%2%") % (settings.showTrace ? e.prefix() : "") % e.msg()); } - if (input.size() > 0) { - // Remove trailing newline before adding to history - input.erase(input.size() - 1); - linenoiseHistoryAdd(input.c_str()); - } - // We handled the current input fully, so we should clear it // and read brand new input. input.clear(); @@ -190,19 +244,10 @@ void NixRepl::mainLoop(const std::vector<std::string> & files) bool NixRepl::getLine(string & input, const std::string &prompt) { - char * s = linenoise(prompt.c_str()); + char * s = readline(prompt.c_str()); Finally doFree([&]() { free(s); }); - if (!s) { - switch (auto type = linenoiseKeyType()) { - case 1: // ctrl-C - input = ""; - return true; - case 2: // ctrl-D - return false; - default: - throw Error(format("Unexpected linenoise keytype: %1%") % type); - } - } + if (!s) + return false; input += s; input += '\n'; return true; |