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Shell: Add support for 'immediate' expressions as variable substitutions

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This commit adds a few basic variable substitution operations:
- length
    Find the length of a string or a list
- length_across
    Find the lengths of things inside a list
- remove_{suffix,prefix}
    Remove a suffix or a prefix from all the passed values
- regex_replace
    Replace all matches of a given regex with a given template
- split
    Split the given string with the given delimiter (or to its
    code points if the delimiter is empty)
- concat_lists
    concatenates any given lists into one

Closes #4316 (the ancient version of this same feature)
This commit is contained in:
AnotherTest 2021-03-05 16:33:23 +03:30 • committed by Andreas Kling
parent a303b69caa
commit a45b2ea6fb
16 changed files with 911 additions and 37 deletions
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21
Userland/Shell/Shell.h
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@ -71,6 +71,15 @@
__ENUMERATE_SHELL_OPTION(inline_exec_keep_empty_segments, false, "Keep empty segments in inline execute $(...)") \
__ENUMERATE_SHELL_OPTION(verbose, false, "Announce every command that is about to be executed")
#define ENUMERATE_SHELL_IMMEDIATE_FUNCTIONS() \
__ENUMERATE_SHELL_IMMEDIATE_FUNCTION(concat_lists) \
__ENUMERATE_SHELL_IMMEDIATE_FUNCTION(length) \
__ENUMERATE_SHELL_IMMEDIATE_FUNCTION(length_across) \
__ENUMERATE_SHELL_IMMEDIATE_FUNCTION(remove_suffix) \
__ENUMERATE_SHELL_IMMEDIATE_FUNCTION(remove_prefix) \
__ENUMERATE_SHELL_IMMEDIATE_FUNCTION(regex_replace) \
__ENUMERATE_SHELL_IMMEDIATE_FUNCTION(split)
namespace Shell {
class Shell;
@ -100,6 +109,8 @@ public:
bool run_file(const String&, bool explicitly_invoked = true);
bool run_builtin(const AST::Command&, const NonnullRefPtrVector<AST::Rewiring>&, int& retval);
bool has_builtin(const StringView&) const;
RefPtr<AST::Node> run_immediate_function(StringView name, AST::ImmediateExpression& invoking_node, const NonnullRefPtrVector<AST::Node>&);
static bool has_immediate_function(const StringView&);
void block_on_job(RefPtr<Job>);
void block_on_pipeline(RefPtr<AST::Pipeline>);
String prompt() const;
@ -173,6 +184,7 @@ public:
Vector<Line::CompletionSuggestion> complete_variable(const String&, size_t offset);
Vector<Line::CompletionSuggestion> complete_user(const String&, size_t offset);
Vector<Line::CompletionSuggestion> complete_option(const String&, const String&, size_t offset);
Vector<Line::CompletionSuggestion> complete_immediate_function_name(const String&, size_t offset);
void restore_ios();
@ -285,6 +297,15 @@ private:
virtual void custom_event(Core::CustomEvent&) override;
#define __ENUMERATE_SHELL_IMMEDIATE_FUNCTION(name) \
RefPtr<AST::Node> immediate_##name(AST::ImmediateExpression& invoking_node, const NonnullRefPtrVector<AST::Node>&);
ENUMERATE_SHELL_IMMEDIATE_FUNCTIONS();
#undef __ENUMERATE_SHELL_IMMEDIATE_FUNCTION
RefPtr<AST::Node> immediate_length_impl(AST::ImmediateExpression& invoking_node, const NonnullRefPtrVector<AST::Node>&, bool across);
#define __ENUMERATE_SHELL_BUILTIN(builtin) \
int builtin_##builtin(int argc, const char** argv);