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use std::borrow::Cow;
use crate::{args::GetCommand, Taplo};
use anyhow::anyhow;
use codespan_reporting::files::SimpleFile;
use taplo::{
dom::{Keys, Node},
parser,
};
use taplo_common::environment::Environment;
use tokio::io::{AsyncReadExt, AsyncWriteExt};
impl<E: Environment> Taplo<E> {
pub async fn execute_get(&self, cmd: GetCommand) -> Result<(), anyhow::Error> {
let mut stdout = self.env.stdout();
let source = match &cmd.file_path {
Some(p) => String::from_utf8(self.env.read_file(p).await?)?,
None => {
let mut stdin = self.env.stdin();
let mut s = String::new();
stdin.read_to_string(&mut s).await?;
s
}
};
let parse = parser::parse(&source);
let file_path = cmd
.file_path
.as_ref()
.map(|p| p.to_string_lossy())
.unwrap_or(Cow::Borrowed("-"));
self.print_parse_errors(&SimpleFile::new(&file_path, &source), &parse.errors)
.await?;
if !parse.errors.is_empty() {
return Err(anyhow!("syntax errors found"));
}
let node = parse.into_dom();
if let Err(errors) = node.validate() {
self.print_semantic_errors(&SimpleFile::new(&file_path, &source), errors)
.await?;
return Err(anyhow!("semantic errors found"));
}
match cmd.output_format {
crate::args::OutputFormat::Json => {
if let Some(p) = cmd.pattern {
let p = p.trim_start_matches('.');
let keys = p
.parse::<Keys>()
.map_err(|err| anyhow!("invalid pattern: {err}"))?;
let mut nodes = node
.find_all_matches(keys, false)
.map_err(|err| anyhow!("invalid pattern: {err}"))?;
if nodes.len() == 0 {
return Err(anyhow!("no values matched the pattern"));
}
if nodes.len() == 1 {
stdout
.write_all(&serde_json::to_vec_pretty(&nodes.next().unwrap().1)?)
.await?;
if !cmd.strip_newline {
stdout.write(b"\n").await?;
}
stdout.flush().await?;
} else {
stdout
.write_all(&serde_json::to_vec_pretty(
&nodes.map(|n| n.1).collect::<Vec<_>>(),
)?)
.await?;
if !cmd.strip_newline {
stdout.write(b"\n").await?;
}
stdout.flush().await?;
}
} else {
stdout.write_all(&serde_json::to_vec_pretty(&node)?).await?;
if !cmd.strip_newline {
stdout.write(b"\n").await?;
}
stdout.flush().await?;
}
}
crate::args::OutputFormat::Value => {
if let Some(p) = cmd.pattern {
let p = p.trim_start_matches('.');
let keys = p
.parse::<Keys>()
.map_err(|err| anyhow!("invalid pattern: {err}"))?;
let nodes = node
.find_all_matches(keys, false)
.map_err(|err| anyhow!("invalid pattern: {err}"))?;
if nodes.len() == 0 {
return Err(anyhow!("no values matched the pattern"));
}
let mut buf = String::new();
for (_, node) in nodes {
buf += &extract_value(&node)?;
buf += "\n";
}
if cmd.strip_newline {
if buf.ends_with('\n') {
let new_len = buf.trim_end().len();
buf.truncate(new_len);
}
} else if !buf.ends_with('\n') {
buf += "\n";
}
stdout.write_all(buf.as_bytes()).await?;
stdout.flush().await?;
} else {
let mut buf = extract_value(&node)?;
if cmd.strip_newline {
if buf.ends_with('\n') {
let new_len = buf.trim_end().len();
buf.truncate(new_len);
}
} else if !buf.ends_with('\n') {
buf += "\n";
}
stdout.write_all(buf.as_bytes()).await?;
stdout.flush().await?;
}
}
crate::args::OutputFormat::Toml => {
if let Some(p) = cmd.pattern {
let p = p.trim_start_matches('.');
let keys = p
.parse::<Keys>()
.map_err(|err| anyhow!("invalid pattern: {err}"))?;
let mut nodes = node
.find_all_matches(keys, false)
.map_err(|err| anyhow!("invalid pattern: {err}"))?;
if nodes.len() == 0 {
return Err(anyhow!("no values matched the pattern"));
}
if nodes.len() == 1 {
let mut buf = nodes.next().unwrap().1.to_toml(false);
if cmd.strip_newline {
if buf.ends_with('\n') {
let new_len = buf.trim_end().len();
buf.truncate(new_len);
}
} else if !buf.ends_with('\n') {
buf += "\n";
}
stdout.write_all(buf.as_bytes()).await?;
stdout.flush().await?;
} else {
let mut buf = String::from("[\n");
for (_, node) in nodes {
buf += " ";
buf += &node.to_toml(true);
buf += ",\n";
}
buf += "]\n";
if cmd.strip_newline {
if buf.ends_with('\n') {
let new_len = buf.trim_end().len();
buf.truncate(new_len);
}
} else if !buf.ends_with('\n') {
buf += "\n";
}
stdout.write(buf.as_bytes()).await?;
stdout.flush().await?;
}
stdout.flush().await?;
} else {
let mut buf = node.to_toml(false);
if cmd.strip_newline {
if buf.ends_with('\n') {
let new_len = buf.trim_end().len();
buf.truncate(new_len);
}
} else if !buf.ends_with('\n') {
buf += "\n";
}
stdout.write_all(buf.as_bytes()).await?;
stdout.flush().await?;
}
}
}
Ok(())
}
}
fn extract_value(node: &Node) -> Result<String, anyhow::Error> {
Ok(match node {
Node::Table(_) => {
return Err(anyhow!(
r#"cannot print tables with the given output format, specify a different output format (e.g. with `-o json`) "#
))
}
Node::Array(arr) => {
let mut s = String::new();
let mut start = true;
for item in &**arr.items().read() {
if !start {
s += "\n";
}
start = false;
s += &extract_value(item)?;
}
s
}
Node::Bool(b) => b.value().to_string(),
Node::Str(s) => s.value().to_string(),
Node::Integer(i) => i.value().to_string(),
Node::Float(f) => f.value().to_string(),
Node::Date(d) => d.value().to_string(),
Node::Invalid(_) => "".into(),
})
}
