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Add the default help flag

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This commit is contained in:
JT
2021-10-14 06:53:27 +13:00
parent ff6cc2cbdd
commit fdd2c35fd9
8 changed files with 89 additions and 41 deletions
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64
crates/nu-engine/src/eval.rs
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@ -2,6 +2,8 @@ use nu_protocol::ast::{Block, Call, Expr, Expression, Operator, Statement};
use nu_protocol::engine::EvaluationContext;
use nu_protocol::{Range, ShellError, Span, Spanned, Type, Unit, Value};
use crate::get_full_help;
pub fn eval_operator(op: &Expression) -> Result<Operator, ShellError> {
match op {
Expression {
@ -17,7 +19,13 @@ pub fn eval_operator(op: &Expression) -> Result<Operator, ShellError> {
fn eval_call(context: &EvaluationContext, call: &Call, input: Value) -> Result<Value, ShellError> {
let engine_state = context.engine_state.borrow();
let decl = engine_state.get_decl(call.decl_id);
if let Some(block_id) = decl.get_block_id() {
if call.named.iter().any(|(flag, _)| flag.item == "help") {
let full_help = get_full_help(&decl.signature(), &decl.examples(), context);
Ok(Value::String {
val: full_help,
span: call.head,
})
} else if let Some(block_id) = decl.get_block_id() {
let state = context.enter_scope();
for (arg, param) in call.positional.iter().zip(
decl.signature()
@ -62,38 +70,36 @@ fn eval_call(context: &EvaluationContext, call: &Call, input: Value) -> Result<V
}
for named in decl.signature().named {
let var_id = named
.var_id
.expect("internal error: all custom parameters must have var_ids");
if let Some(var_id) = named.var_id {
let mut found = false;
for call_named in &call.named {
if call_named.0.item == named.long {
if let Some(arg) = &call_named.1 {
let result = eval_expression(&state, arg)?;
let mut found = false;
for call_named in &call.named {
if call_named.0.item == named.long {
if let Some(arg) = &call_named.1 {
let result = eval_expression(&state, arg)?;
state.add_var(var_id, result);
} else {
state.add_var(
var_id,
Value::Bool {
val: true,
span: call.head,
},
)
state.add_var(var_id, result);
} else {
state.add_var(
var_id,
Value::Bool {
val: true,
span: call.head,
},
)
}
found = true;
}
found = true;
}
}
if !found && named.arg.is_none() {
state.add_var(
var_id,
Value::Bool {
val: false,
span: call.head,
},
)
if !found && named.arg.is_none() {
state.add_var(
var_id,
Value::Bool {
val: false,
span: call.head,
},
)
}
}
}
let engine_state = state.engine_state.borrow();