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https://github.com/nushell/nushell.git
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Plugin with evaluated call (#393)
* plugin trait * impl of trait * record and absolute path * plugin example crate * clippy error * correcting cargo * evaluated call for plugin
This commit is contained in:
Fernando Herrera
GitHub
339
crates/nu-protocol/src/value/from_value.rs
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339
crates/nu-protocol/src/value/from_value.rs
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@ -0,0 +1,339 @@
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// use std::path::PathBuf;
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use std::path::PathBuf;
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use std::str::FromStr;
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use chrono::{DateTime, FixedOffset};
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// use nu_path::expand_path;
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use crate::ast::{CellPath, PathMember};
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use crate::ShellError;
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use crate::{Range, Spanned, Value};
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pub trait FromValue: Sized {
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fn from_value(v: &Value) -> Result<Self, ShellError>;
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}
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impl FromValue for Value {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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Ok(v.clone())
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}
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}
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impl FromValue for Spanned<i64> {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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match v {
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Value::Int { val, span } => Ok(Spanned {
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item: *val,
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span: *span,
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}),
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Value::Filesize { val, span } => Ok(Spanned {
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item: *val as i64,
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span: *span,
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}),
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Value::Duration { val, span } => Ok(Spanned {
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item: *val as i64,
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span: *span,
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}),
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v => Err(ShellError::CantConvert(
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"integer".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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impl FromValue for i64 {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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match v {
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Value::Int { val, .. } => Ok(*val),
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Value::Filesize { val, .. } => Ok(*val as i64),
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Value::Duration { val, .. } => Ok(*val as i64),
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v => Err(ShellError::CantConvert(
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"integer".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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impl FromValue for Spanned<f64> {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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match v {
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Value::Int { val, span } => Ok(Spanned {
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item: *val as f64,
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span: *span,
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}),
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Value::Float { val, span } => Ok(Spanned {
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item: *val,
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span: *span,
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}),
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v => Err(ShellError::CantConvert(
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"float".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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impl FromValue for f64 {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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match v {
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Value::Float { val, .. } => Ok(*val),
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Value::Int { val, .. } => Ok(*val as f64),
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v => Err(ShellError::CantConvert(
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"float".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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impl FromValue for Spanned<usize> {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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match v {
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Value::Int { val, span } => Ok(Spanned {
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item: *val as usize,
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span: *span,
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}),
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Value::Filesize { val, span } => Ok(Spanned {
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item: *val as usize,
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span: *span,
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}),
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Value::Duration { val, span } => Ok(Spanned {
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item: *val as usize,
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span: *span,
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}),
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v => Err(ShellError::CantConvert(
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"integer".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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impl FromValue for usize {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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match v {
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Value::Int { val, .. } => Ok(*val as usize),
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Value::Filesize { val, .. } => Ok(*val as usize),
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Value::Duration { val, .. } => Ok(*val as usize),
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v => Err(ShellError::CantConvert(
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"integer".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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impl FromValue for String {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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// FIXME: we may want to fail a little nicer here
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match v {
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Value::CellPath { val, .. } => Ok(val.into_string()),
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Value::String { val, .. } => Ok(val.clone()),
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v => Err(ShellError::CantConvert(
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"string".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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impl FromValue for Spanned<String> {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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Ok(Spanned {
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item: match v {
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Value::CellPath { val, .. } => val.into_string(),
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Value::String { val, .. } => val.clone(),
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v => {
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return Err(ShellError::CantConvert(
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"string".into(),
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v.get_type().to_string(),
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v.span()?,
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))
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}
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},
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span: v.span()?,
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})
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}
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}
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impl FromValue for Vec<String> {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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// FIXME: we may want to fail a little nicer here
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match v {
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Value::List { vals, .. } => vals
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.iter()
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.map(|val| match val {
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Value::String { val, .. } => Ok(val.clone()),
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c => Err(ShellError::CantConvert(
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"string".into(),
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c.get_type().to_string(),
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c.span()?,
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)),
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})
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.collect::<Result<Vec<String>, ShellError>>(),
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v => Err(ShellError::CantConvert(
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"string".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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impl FromValue for CellPath {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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let span = v.span()?;
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match v {
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Value::CellPath { val, .. } => Ok(val.clone()),
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Value::String { val, .. } => Ok(CellPath {
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members: vec![PathMember::String {
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val: val.clone(),
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span,
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}],
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}),
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Value::Int { val, .. } => Ok(CellPath {
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members: vec![PathMember::Int {
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val: *val as usize,
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span,
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}],
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}),
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x => Err(ShellError::CantConvert(
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"cell path".into(),
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x.get_type().to_string(),
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span,
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)),
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}
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}
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}
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impl FromValue for bool {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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match v {
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Value::Bool { val, .. } => Ok(*val),
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v => Err(ShellError::CantConvert(
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"bool".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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impl FromValue for Spanned<bool> {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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match v {
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Value::Bool { val, span } => Ok(Spanned {
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item: *val,
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span: *span,
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}),
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v => Err(ShellError::CantConvert(
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"bool".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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impl FromValue for DateTime<FixedOffset> {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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match v {
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Value::Date { val, .. } => Ok(*val),
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v => Err(ShellError::CantConvert(
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"date".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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impl FromValue for Spanned<DateTime<FixedOffset>> {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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match v {
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Value::Date { val, span } => Ok(Spanned {
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item: *val,
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span: *span,
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}),
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v => Err(ShellError::CantConvert(
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"date".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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impl FromValue for Range {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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match v {
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Value::Range { val, .. } => Ok((**val).clone()),
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v => Err(ShellError::CantConvert(
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"range".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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impl FromValue for Spanned<Range> {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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match v {
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Value::Range { val, span } => Ok(Spanned {
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item: (**val).clone(),
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span: *span,
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}),
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v => Err(ShellError::CantConvert(
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"range".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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impl FromValue for Vec<u8> {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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match v {
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Value::Binary { val, .. } => Ok(val.clone()),
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Value::String { val, .. } => Ok(val.bytes().collect()),
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v => Err(ShellError::CantConvert(
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"binary data".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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impl FromValue for Spanned<PathBuf> {
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fn from_value(v: &Value) -> Result<Self, ShellError> {
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match v {
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Value::String { val, span } => Ok(Spanned {
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item: PathBuf::from_str(val)
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.map_err(|err| ShellError::FileNotFoundCustom(err.to_string(), *span))?,
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span: *span,
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}),
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v => Err(ShellError::CantConvert(
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"range".into(),
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v.get_type().to_string(),
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v.span()?,
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)),
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}
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}
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}
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@ -1,11 +1,13 @@
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mod custom_value;
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mod from;
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mod from_value;
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mod range;
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mod stream;
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mod unit;
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use chrono::{DateTime, FixedOffset};
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use chrono_humanize::HumanTime;
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pub use from_value::FromValue;
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use indexmap::map::IndexMap;
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pub use range::*;
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use serde::{Deserialize, Serialize};
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