From 04e5d0e7040fdfbbc084634c0694ae7da89765d9 Mon Sep 17 00:00:00 2001 From: regnat Date: Fri, 9 Oct 2020 09:39:51 +0200 Subject: [PATCH] Add a description in the completion outputs Make nix output completions in the form `completion\tdescription`. This can't be used by bash (afaik), but other shells like zsh or fish can display it along the completion choices --- misc/bash/completion.sh | 5 +++-- src/libmain/common-args.cc | 2 +- src/libutil/args.cc | 29 ++++++++++++++++++++--------- src/libutil/args.hh | 12 +++++++++++- src/nix/installables.cc | 12 ++++++------ src/nix/main.cc | 2 +- 6 files changed, 42 insertions(+), 20 deletions(-) diff --git a/misc/bash/completion.sh b/misc/bash/completion.sh index bc184edd6..bea2a40bc 100644 --- a/misc/bash/completion.sh +++ b/misc/bash/completion.sh @@ -4,13 +4,14 @@ function _complete_nix { _get_comp_words_by_ref -n ':=&' words cword cur local have_type while IFS= read -r line; do + local completion=${line%% *} if [[ -z $have_type ]]; then have_type=1 - if [[ $line = filenames ]]; then + if [[ $completion = filenames ]]; then compopt -o filenames fi else - COMPREPLY+=("$line") + COMPREPLY+=("$completion") fi done < <(NIX_GET_COMPLETIONS=$cword "${words[@]}") __ltrim_colon_completions "$cur" diff --git a/src/libmain/common-args.cc b/src/libmain/common-args.cc index 3411e2d7a..9151a0344 100644 --- a/src/libmain/common-args.cc +++ b/src/libmain/common-args.cc @@ -44,7 +44,7 @@ MixCommonArgs::MixCommonArgs(const string & programName) globalConfig.getSettings(settings); for (auto & s : settings) if (hasPrefix(s.first, prefix)) - completions->insert(s.first); + completions->add(s.first, s.second.description); } } }); diff --git a/src/libutil/args.cc b/src/libutil/args.cc index 2760b830b..66d8df085 100644 --- a/src/libutil/args.cc +++ b/src/libutil/args.cc @@ -17,8 +17,19 @@ void Args::addFlag(Flag && flag_) if (flag->shortName) shortFlags[flag->shortName] = flag; } +void Completions::add(std::string completion, std::string description) +{ + insert(Completion{ + .completion = completion, + .description = description + }); +} + +bool Completion::operator<(const Completion & other) const +{ return completion < other.completion || (completion == other.completion && description < other.description); } + bool pathCompletions = false; -std::shared_ptr> completions; +std::shared_ptr completions; std::string completionMarker = "___COMPLETE___"; @@ -148,7 +159,7 @@ bool Args::processFlag(Strings::iterator & pos, Strings::iterator end) for (auto & [name, flag] : longFlags) { if (!hiddenCategories.count(flag->category) && hasPrefix(name, std::string(*prefix, 2))) - completions->insert("--" + name); + completions->add("--" + name, flag->description); } } auto i = longFlags.find(string(*pos, 2)); @@ -165,9 +176,9 @@ bool Args::processFlag(Strings::iterator & pos, Strings::iterator end) if (auto prefix = needsCompletion(*pos)) { if (prefix == "-") { - completions->insert("--"); - for (auto & [flag, _] : shortFlags) - completions->insert(std::string("-") + flag); + completions->add("--"); + for (auto & [flagName, flag] : shortFlags) + completions->add(std::string("-") + flagName, flag->description); } } @@ -244,11 +255,11 @@ nlohmann::json Args::toJSON() return res; } -static void hashTypeCompleter(size_t index, std::string_view prefix) +static void hashTypeCompleter(size_t index, std::string_view prefix) { for (auto & type : hashTypes) if (hasPrefix(type, prefix)) - completions->insert(type); + completions->add(type); } Args::Flag Args::Flag::mkHashTypeFlag(std::string && longName, HashType * ht) @@ -292,7 +303,7 @@ static void _completePath(std::string_view prefix, bool onlyDirs) auto st = lstat(globbuf.gl_pathv[i]); if (!S_ISDIR(st.st_mode)) continue; } - completions->insert(globbuf.gl_pathv[i]); + completions->add(globbuf.gl_pathv[i]); } globfree(&globbuf); } @@ -385,7 +396,7 @@ MultiCommand::MultiCommand(const Commands & commands) if (auto prefix = needsCompletion(s)) { for (auto & [name, command] : commands) if (hasPrefix(name, *prefix)) - completions->insert(name); + completions->add(name); } auto i = commands.find(s); if (i == commands.end()) diff --git a/src/libutil/args.hh b/src/libutil/args.hh index f41242e17..26f1bc11b 100644 --- a/src/libutil/args.hh +++ b/src/libutil/args.hh @@ -283,7 +283,17 @@ typedef std::vector> Table2; void printTable(std::ostream & out, const Table2 & table); -extern std::shared_ptr> completions; +struct Completion { + std::string completion; + std::string description; + + bool operator<(const Completion & other) const; +}; +class Completions : public std::set { +public: + void add(std::string completion, std::string description = ""); +}; +extern std::shared_ptr completions; extern bool pathCompletions; std::optional needsCompletion(std::string_view s); diff --git a/src/nix/installables.cc b/src/nix/installables.cc index 9bf6b7caa..7473c9758 100644 --- a/src/nix/installables.cc +++ b/src/nix/installables.cc @@ -26,7 +26,7 @@ void completeFlakeInputPath( auto flake = flake::getFlake(*evalState, flakeRef, true); for (auto & input : flake.inputs) if (hasPrefix(input.first, prefix)) - completions->insert(input.first); + completions->add(input.first); } MixFlakeOptions::MixFlakeOptions() @@ -211,7 +211,7 @@ void completeFlakeRefWithFragment( auto attrPath2 = attr->getAttrPath(attr2); /* Strip the attrpath prefix. */ attrPath2.erase(attrPath2.begin(), attrPath2.begin() + attrPathPrefix.size()); - completions->insert(flakeRefS + "#" + concatStringsSep(".", attrPath2)); + completions->add(flakeRefS + "#" + concatStringsSep(".", attrPath2)); } } } @@ -222,7 +222,7 @@ void completeFlakeRefWithFragment( for (auto & attrPath : defaultFlakeAttrPaths) { auto attr = root->findAlongAttrPath(parseAttrPath(*evalState, attrPath)); if (!attr) continue; - completions->insert(flakeRefS + "#"); + completions->add(flakeRefS + "#"); } } } @@ -243,7 +243,7 @@ ref EvalCommand::getEvalState() void completeFlakeRef(ref store, std::string_view prefix) { if (prefix == "") - completions->insert("."); + completions->add("."); completeDir(0, prefix); @@ -254,10 +254,10 @@ void completeFlakeRef(ref store, std::string_view prefix) if (!hasPrefix(prefix, "flake:") && hasPrefix(from, "flake:")) { std::string from2(from, 6); if (hasPrefix(from2, prefix)) - completions->insert(from2); + completions->add(from2); } else { if (hasPrefix(from, prefix)) - completions->insert(from); + completions->add(from); } } } diff --git a/src/nix/main.cc b/src/nix/main.cc index 1e9e07bc0..5056ceb78 100644 --- a/src/nix/main.cc +++ b/src/nix/main.cc @@ -208,7 +208,7 @@ void mainWrapped(int argc, char * * argv) if (completions) { std::cout << (pathCompletions ? "filenames\n" : "no-filenames\n"); for (auto & s : *completions) - std::cout << s << "\n"; + std::cout << s.completion << "\t" << s.description << "\n"; } });