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mirror of https://github.com/wader/fq.git synced 2024-12-24 13:52:02 +03:00
fq/pkg/interp/repl.jq
Mattias Wadman c4219d69db interp: Fix interrupt panic for cli eval
Rewrite cli query to use display as output query, same as for repl.
Without this "tovalue" values that don't print in the current eval
will end up in the paren eval and be written using an output without
a cancel context.
2022-09-29 18:17:57 +02:00

342 lines
9.2 KiB
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include "internal";
include "options";
include "eval";
include "query";
include "decode";
include "interp";
include "funcs";
include "ansi";
# TODO: currently only make sense to allow keywords starting a term or directive
def _complete_keywords:
[
"and",
#"as",
#"break",
#"catch",
"def",
#"elif",
#"else",
#"end",
"false",
"foreach",
"if",
"import",
"include",
"label",
"module",
"null",
"or",
"reduce",
#"then",
"true",
"try"
];
def _complete_scope:
[ (scope | map(split("/")[0]) | unique)
, _complete_keywords
] | add;
def _complete_keys:
# uses try as []? will not catch errors
[try keys[] catch empty, try _extkeys[] catch empty];
# TODO: "def zzz: null; abc" scope won't see zzz after completion rewrite as def will be inside map(def zzz: null; abc | ...)
# TODO: handle variables via ast walk?
# TODO: refactor this
# TODO: completionMode
# TODO: return escaped identifier, not sure current readline implementation supports
# modifying "previous" characters if quoting is needed
# completions that needs to change previous input, ex: .a\t -> ."a \" b" etc
def _complete($line; $cursor_pos):
# TODO: reverse this? word or non-ident char?
def _is_separator: . as $c | " .;[]()|=" | contains($c);
def _is_internal: startswith("_") or startswith("$_");
def _query_index_or_key($q):
( ([.[] | _eval($q; {}) | type]) as $n
| if ($n | all(. == "object")) then "."
elif ($n | all(. == "array")) then "[]"
else null
end
);
# only complete if at end or there is a whitespace for now
if ($line[$cursor_pos] | . == null or _is_separator) then
( . as $c
| $line[0:$cursor_pos]
| . as $line_query
# expr -> map(partial-expr | . | f?) | add
# TODO: move map/add logic to here?
| _query_completion(
if .type | . == "func" or . == "var" then "_complete_scope"
elif .type == "index" then "_complete_keys"
else error("unreachable")
end
) as {$type, $query, $prefix}
| {
prefix: $prefix,
names: (
if $type == "none" then
( $c
| _query_index_or_key($line_query)
| if . then [.] else [] end
)
else
( $c
| _eval($query; {})
| ($prefix | _is_internal) as $prefix_is_internal
| map(
select(
strings and
# TODO: var type really needed? just func?
(_is_ident or $type == "var") and
((_is_internal | not) or $prefix_is_internal) and
startswith($prefix)
)
)
| unique
| sort
| if length == 1 and .[0] == $prefix then
( $c
| _query_index_or_key($line_query)
| if . then [$prefix+.] else [$prefix] end
)
end
)
end
)
}
)
else
{prefix: "", names: []}
end;
def _complete($line): _complete($line; $line | length);
# empty input []
# >* empty>
# single input [v]
# >* VALUE_PATH VALUE_PREVIEW>
# multiple inputs [v,...]
# >* VALUE_PATH VALUE_PREVIEW, ...[#]>
# single/multi inputs where first input is array [[v,...], ...]
# >* [VALUE_PATH VALUE_PREVIEW, ...][#], ...[#]>
def _prompt($opts):
def _repl_level:
(_options_stack | length | if . > 2 then ((.-2) * ">") else empty end);
def _value_path:
(._path? // []) | if . == [] then empty else _path_to_expr($opts) end;
def _value_preview($depth):
if $depth == 0 and format == null and _is_array then
[ "["
, if length == 0 then empty
else
( (.[0] | _value_preview(1))
, if length > 1 then ", ..." else empty end
)
end
, "]"
, if length > 1 then
( ("[" | _ansi_if($opts; "array"))
, ("0" | _ansi_if($opts; "number"))
, ":"
, (length | tostring | _ansi_if($opts; "number"))
, ("]" | _ansi_if($opts; "array"))
)
else empty
end
] | join("")
else
( . as $c
| format
| if . != null then
( .
+ if $c._error then "!" else "" end
)
else
($c | type)
end
) | _ansi_if($opts; "prompt_value")
end;
def _value:
[ _value_path
, _value_preview(0)
] | join(" ");
def _values:
if length == 0 then "empty"
else
[ (.[0] | _value)
, if length > 1 then
( ", ..."
, ("[" | _ansi_if($opts; "array"))
, ("0" | _ansi_if($opts; "number"))
, ":"
, (length | tostring | _ansi_if($opts; "number"))
, ("]" | _ansi_if($opts; "array"))
, "[]"
)
else empty
end
] | join("")
end;
[ (_repl_level | _ansi_if($opts; "prompt_repl_level")) , _values
] | join(" ") + "> ";
def _prompt: _prompt(null);
# user expr error
def _repl_on_expr_error:
( if _eval_is_compile_error then _eval_compile_error_tostring
else tostring
end
| _error_str
| println
);
# other expr error, interrupted or something unexpected happened
def _repl_on_error:
# was interrupted by user, just ignore
if .error | _is_context_canceled_error then empty
else halt_error(_exit_code_expr_error)
end;
# compile error
def _repl_on_compile_error:
( if .error | _eval_is_compile_error then
( # TODO: move, redo as: def _symbols: if unicode then {...} else {...} end?
def _arrow_up: if options.unicode then "⬆" else "^" end;
if .error.column != 0 then
( ((.input | _prompt | length) + .error.column-1) as $pos
| " " * $pos + "\(_arrow_up) \(.error.error)"
)
else
( .error
| _eval_compile_error_tostring
| _error_str
)
end
)
else .error | _error_str
end
| println
);
def _repl_display:
display(_display_default_opts);
def _repl_eval($expr; on_error; on_compile_error):
eval(
$expr;
{ slurps:
{ repl: "_repl_slurp",
help: "_help_slurp",
slurp: "_slurp"
},
# input to repl is always array of values to iterate
input_query: (_query_ident | _query_iter), # .[]
# each input should be evaluted separately like cli file args, so catch and just print errors
catch_query: _query_func("_repl_on_expr_error"),
# run display in sub eval so it can be interrupted
output_query: _query_func("_repl_display")
};
on_error;
on_compile_error
);
# run read-eval-print-loop
# input is array of inputs to iterate
def _repl($opts):
def _read_expr:
_repeat_break(
# both _prompt and _complete want input arrays
( _readline({
prompt: _prompt(options($opts)),
complete: "_complete",
timeout: options.completion_timeout
})
| if trim == "" then empty
else (., error("break"))
end
)
);
def _repl_loop:
try
_repl_eval(
_read_expr;
_repl_on_error;
_repl_on_compile_error
)
catch
if . == "interrupt" then empty
elif . == "eof" then error("break")
elif _eval_is_compile_error then _repl_on_error
else error
end;
if $opts | type != "object" then
error("options must be an object")
elif _is_completing | not then
( _options_stack(. + [$opts]) as $_
| _finally(
_repeat_break(_repl_loop);
_options_stack(.[:-1])
)
)
else empty
end;
def _repl_slurp_eval($query):
try
[ eval(
$query | _query_tostring;
{};
_repl_on_expr_error;
error
)
]
catch
error(.error);
def _repl_slurp($query):
if ($query.slurp_args | length) > 1 then
_eval_error("compile"; "repl requires none or one options argument. ex: ... | repl or ... | repl({compact: true})")
else
# only allow one output for args, multiple would be confusing i think (would start multiples repl:s)
( ( if ($query.slurp_args | length) > 0 then
first(_repl_slurp_eval($query.slurp_args[0])[])
else {}
end
) as $opts
| if $opts | type != "object" then
_eval_error("compile"; "options must be an object")
end
| _repl_slurp_eval($query.rewrite)
| _repl($opts)
)
end;
# just gives error, call appearing last will be renamed to _repl_slurp
def repl($_): error("repl must be last in pipeline. ex: ... | repl");
def repl: repl(null);
def _slurp($query):
if ($query.slurp_args | length != 1) then
_eval_error("compile"; "slurp requires one string argument. ex: ... | slurp(\"name\")")
else
# TODO: allow only one output?
( _repl_slurp_eval($query.slurp_args[0])[] as $name
| if ($name | _is_ident | not) then
_eval_error("compile"; "invalid slurp name \"\($name)\", must be a valid identifier. ex: ... | slurp(\"name\")")
else
( _repl_slurp_eval($query.rewrite) as $v
| _slurps(.[$name] |= $v)
| empty
)
end
)
end;
def slurp($_): error("slurp must be last in pipeline. ex: ... | slurp(\"name\")");
def slurp: slurp(null);
def spew($name):
( _slurps[$name]
| if . then .[]
else error("no such slurp: \($name)")
end
);
def spew:
_slurps;