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Use args structs to better extract multiple arguments

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This commit is contained in:
Odin Dutton 2019-08-20 13:15:05 +10:00
parent 9951691023
commit 31790a9906
4 changed files with 55 additions and 57 deletions
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26
src/commands/pick.rs
View file

@ -4,6 +4,11 @@ use crate::errors::ShellError;
use crate::object::base::select_fields;
use crate::prelude::*;
#[derive(Deserialize)]
struct PickArgs {
rest: Vec<Tagged<String>>,
}
pub struct Pick;
impl WholeStreamCommand for Pick {
@ -12,7 +17,7 @@ impl WholeStreamCommand for Pick {
args: CommandArgs,
registry: &CommandRegistry,
) -> Result<OutputStream, ShellError> {
pick(args, registry)
args.process(registry, pick)?.run()
}
fn name(&self) -> &str {
@ -20,22 +25,15 @@ impl WholeStreamCommand for Pick {
}
fn signature(&self) -> Signature {
Signature::build("pick").required("fields", SyntaxType::Any)
Signature::build("pick").rest()
}
}
fn pick(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
let args = args.evaluate_once(registry)?;
let (input, args) = args.parts();
let fields: Result<Vec<String>, _> = args
.positional
.iter()
.flatten()
.map(|a| a.as_string())
.collect();
let fields = fields?;
fn pick(
PickArgs { rest: fields }: PickArgs,
RunnableContext { input, .. }: RunnableContext,
) -> Result<OutputStream, ShellError> {
let fields: Vec<_> = fields.iter().map(|f| f.item.clone()).collect();
let objects = input
.values

26
src/commands/reject.rs
View file

@ -3,6 +3,11 @@ use crate::errors::ShellError;
use crate::object::base::reject_fields;
use crate::prelude::*;
#[derive(Deserialize)]
pub struct RejectArgs {
rest: Vec<Tagged<String>>,
}
pub struct Reject;
impl WholeStreamCommand for Reject {
@ -11,7 +16,7 @@ impl WholeStreamCommand for Reject {
args: CommandArgs,
registry: &CommandRegistry,
) -> Result<OutputStream, ShellError> {
reject(args, registry)
args.process(registry, reject)?.run()
}
fn name(&self) -> &str {
@ -19,22 +24,15 @@ impl WholeStreamCommand for Reject {
}
fn signature(&self) -> Signature {
Signature::build("reject").required("fields", SyntaxType::Any)
Signature::build("reject").rest()
}
}
fn reject(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
let args = args.evaluate_once(registry)?;
let (input, args) = args.parts();
let fields: Result<Vec<String>, _> = args
.positional
.iter()
.flatten()
.map(|a| a.as_string())
.collect();
let fields = fields?;
fn reject(
RejectArgs { rest: fields }: RejectArgs,
RunnableContext { input, .. }: RunnableContext,
) -> Result<OutputStream, ShellError> {
let fields: Vec<_> = fields.iter().map(|f| f.item.clone()).collect();
let stream = input
.values

35
src/commands/split_column.rs
View file

@ -4,6 +4,11 @@ use crate::object::{Primitive, TaggedDictBuilder, Value};
use crate::prelude::*;
use log::trace;
#[derive(Deserialize)]
struct SplitColumnArgs {
rest: Vec<Tagged<String>>,
}
pub struct SplitColumn;
impl WholeStreamCommand for SplitColumn {
@ -12,7 +17,7 @@ impl WholeStreamCommand for SplitColumn {
args: CommandArgs,
registry: &CommandRegistry,
) -> Result<OutputStream, ShellError> {
split_column(args, registry)
args.process(registry, split_column)?.run()
}
fn name(&self) -> &str {
@ -20,26 +25,25 @@ impl WholeStreamCommand for SplitColumn {
}
fn signature(&self) -> Signature {
// TODO: Signature?
// TODO: Improve error. Old error had extra info:
//
// needs parameter (e.g. split-column ",")
Signature::build("split-column").required("delimeter", SyntaxType::Any)
Signature::build("split-column").rest()
}
}
fn split_column(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
let args = args.evaluate_once(registry)?;
let span = args.name_span();
let (input, args) = args.parts();
let positional: Vec<_> = args.positional.iter().flatten().cloned().collect();
fn split_column(
SplitColumnArgs { rest: positional }: SplitColumnArgs,
RunnableContext { input, name, .. }: RunnableContext,
) -> Result<OutputStream, ShellError> {
Ok(input
.values
.map(move |v| match v.item {
Value::Primitive(Primitive::String(ref s)) => {
let splitter = positional[0].as_string().unwrap().replace("\\n", "\n");
let positional: Vec<_> = positional.iter().map(|f| f.item.clone()).collect();
// TODO: Require at least 1 positional argument.
let splitter = positional[0].replace("\\n", "\n");
trace!("splitting with {:?}", splitter);
let split_result: Vec<_> = s.split(&splitter).filter(|s| s.trim() != "").collect();
@ -61,16 +65,13 @@ fn split_column(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputS
} else if split_result.len() == (positional.len() - 1) {
let mut dict = TaggedDictBuilder::new(v.tag());
for (&k, v) in split_result.iter().zip(positional.iter().skip(1)) {
dict.insert(
v.as_string().unwrap(),
Value::Primitive(Primitive::String(k.into())),
);
dict.insert(v, Value::Primitive(Primitive::String(k.into())));
}
ReturnSuccess::value(dict.into_tagged_value())
} else {
let mut dict = TaggedDictBuilder::new(v.tag());
for k in positional.iter().skip(1) {
dict.insert(k.as_string().unwrap().trim(), Primitive::String("".into()));
dict.insert(k.trim(), Primitive::String("".into()));
}
ReturnSuccess::value(dict.into_tagged_value())
}
@ -78,7 +79,7 @@ fn split_column(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputS
_ => Err(ShellError::labeled_error_with_secondary(
"Expected a string from pipeline",
"requires string input",
span,
name,
"value originates from here",
v.span(),
)),

25
src/commands/split_row.rs
View file

@ -4,6 +4,11 @@ use crate::object::{Primitive, Value};
use crate::prelude::*;
use log::trace;
#[derive(Deserialize)]
struct SplitRowArgs {
rest: Vec<Tagged<String>>,
}
pub struct SplitRow;
impl WholeStreamCommand for SplitRow {
@ -12,7 +17,7 @@ impl WholeStreamCommand for SplitRow {
args: CommandArgs,
registry: &CommandRegistry,
) -> Result<OutputStream, ShellError> {
split_row(args, registry)
args.process(registry, split_row)?.run()
}
fn name(&self) -> &str {
@ -20,26 +25,22 @@ impl WholeStreamCommand for SplitRow {
}
fn signature(&self) -> Signature {
// TODO: Signature?
// TODO: Improve error. Old error had extra info:
//
// needs parameter (e.g. split-row ",")
Signature::build("split-row").required("delimeter", SyntaxType::Any)
Signature::build("split-row").rest()
}
}
fn split_row(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
let args = args.evaluate_once(registry)?;
let span = args.name_span();
let (input, args) = args.parts();
let positional: Vec<Tagged<Value>> = args.positional.iter().flatten().cloned().collect();
fn split_row(
SplitRowArgs { rest: positional }: SplitRowArgs,
RunnableContext { input, name, .. }: RunnableContext,
) -> Result<OutputStream, ShellError> {
let stream = input
.values
.map(move |v| match v.item {
Value::Primitive(Primitive::String(ref s)) => {
let splitter = positional[0].as_string().unwrap().replace("\\n", "\n");
let splitter = positional[0].item.replace("\\n", "\n");
trace!("splitting with {:?}", splitter);
let split_result: Vec<_> = s.split(&splitter).filter(|s| s.trim() != "").collect();
@ -58,7 +59,7 @@ fn split_row(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStre
result.push_back(Err(ShellError::labeled_error_with_secondary(
"Expected a string from pipeline",
"requires string input",
span,
name,
"value originates from here",
v.span(),
)));