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Shell: Implement program-aware autocompletion

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A program can either respond to `--complete -- some args to complete`
directly, or add a `_complete_<program name>` invokable (i.e. shell
function, or just a plain binary in PATH) that completes the given
command and lists the completions on stdout.
Should such a completion fail or yield no results, we'll fall back to
the previous completion algorithm.
This commit is contained in:
Ali Mohammad Pur 2022-03-23 01:14:48 +04:30 • committed by Ali Mohammad Pur
parent fc4d36ccd0
commit 7e4cc187d9
5 changed files with 315 additions and 47 deletions
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6
Userland/Shell/Shell.h
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@ -186,13 +186,15 @@ public:
void highlight(Line::Editor&) const;
Vector<Line::CompletionSuggestion> complete();
Vector<Line::CompletionSuggestion> complete_path(StringView base, StringView, size_t offset, ExecutableOnly executable_only, EscapeMode = EscapeMode::Bareword);
Vector<Line::CompletionSuggestion> complete_program_name(StringView, size_t offset, EscapeMode = EscapeMode::Bareword);
Vector<Line::CompletionSuggestion> complete_variable(StringView, size_t offset);
Vector<Line::CompletionSuggestion> complete_user(StringView, size_t offset);
Vector<Line::CompletionSuggestion> complete_option(StringView, StringView, size_t offset);
Vector<Line::CompletionSuggestion> complete_immediate_function_name(StringView, size_t offset);
Vector<Line::CompletionSuggestion> complete_path(StringView base, StringView, size_t offset, ExecutableOnly executable_only, AST::Node const* command_node, AST::Node const*, EscapeMode = EscapeMode::Bareword);
Vector<Line::CompletionSuggestion> complete_option(StringView, StringView, size_t offset, AST::Node const* command_node, AST::Node const*);
ErrorOr<Vector<Line::CompletionSuggestion>> complete_via_program_itself(size_t offset, AST::Node const* command_node, AST::Node const*, EscapeMode escape_mode, StringView known_program_name);
void restore_ios();
u64 find_last_job_id() const;