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|
use crate::output::Output;
use crate::string_escape::escape_string;
use std::{collections::BTreeMap, fmt, fmt::Write};
pub const DERIVATION_PREFIX: &str = "Derive";
pub const PAREN_OPEN: char = '(';
pub const PAREN_CLOSE: char = ')';
pub const BRACKET_OPEN: char = '[';
pub const BRACKET_CLOSE: char = ']';
pub const COMMA: char = ',';
pub const QUOTE: char = '"';
pub const COLON: &str = ":";
pub const TEXT_COLON: &str = "text:";
pub const SHA256_COLON: &str = "sha256:";
pub const DOT_FILE_EXT: &str = ".drv";
fn write_array_elements(
writer: &mut impl Write,
quote: bool,
open: &str,
closing: &str,
elements: &[&str],
) -> Result<(), fmt::Error> {
writer.write_str(open)?;
for (index, element) in elements.iter().enumerate() {
if index > 0 {
writer.write_char(COMMA)?;
}
if quote {
writer.write_char(QUOTE)?;
}
writer.write_str(element)?;
if quote {
writer.write_char(QUOTE)?;
}
}
writer.write_str(closing)?;
Ok(())
}
pub fn write_outputs(
writer: &mut impl Write,
outputs: &BTreeMap<String, Output>,
) -> Result<(), fmt::Error> {
writer.write_char(BRACKET_OPEN)?;
for (ii, (output_name, output)) in outputs.iter().enumerate() {
if ii > 0 {
writer.write_char(COMMA)?;
}
// TODO(jrhahn) option to strip output
let elements: [&str; 4] = [
&output_name,
&output.path,
&output.hash_algorithm,
&output.hash,
];
write_array_elements(
writer,
true,
&PAREN_OPEN.to_string(),
&PAREN_CLOSE.to_string(),
&elements,
)?
}
writer.write_char(BRACKET_CLOSE)?;
Ok(())
}
pub fn write_input_derivations(
writer: &mut impl Write,
input_derivations: &BTreeMap<String, Vec<String>>,
) -> Result<(), fmt::Error> {
writer.write_char(COMMA)?;
writer.write_char(BRACKET_OPEN)?;
for (ii, (input_derivation_path, input_derivation)) in input_derivations.iter().enumerate() {
if ii > 0 {
writer.write_char(COMMA)?;
}
writer.write_char(PAREN_OPEN)?;
writer.write_char(QUOTE)?;
writer.write_str(input_derivation_path.as_str())?;
writer.write_char(QUOTE)?;
writer.write_char(COMMA)?;
// convert Vec<String> to [&str]
let v: Vec<&str> = input_derivation.iter().map(|x| &**x).collect();
write_array_elements(
writer,
true,
&BRACKET_OPEN.to_string(),
&BRACKET_CLOSE.to_string(),
&v,
)?;
writer.write_char(PAREN_CLOSE)?;
}
writer.write_char(BRACKET_CLOSE)?;
Ok(())
}
pub fn write_input_sources(
writer: &mut impl Write,
input_sources: &[String],
) -> Result<(), fmt::Error> {
writer.write_char(COMMA)?;
// convert Vec<String> to [&str]
let v: Vec<&str> = input_sources.iter().map(|x| &**x).collect();
write_array_elements(
writer,
true,
&BRACKET_OPEN.to_string(),
&BRACKET_CLOSE.to_string(),
&v,
)?;
Ok(())
}
pub fn write_platfrom(writer: &mut impl Write, platform: &str) -> Result<(), fmt::Error> {
writer.write_char(COMMA)?;
writer.write_str(escape_string(platform).as_str())?;
Ok(())
}
pub fn write_builder(writer: &mut impl Write, builder: &str) -> Result<(), fmt::Error> {
writer.write_char(COMMA)?;
writer.write_str(escape_string(builder).as_str())?;
Ok(())
}
pub fn write_arguments(writer: &mut impl Write, arguments: &[String]) -> Result<(), fmt::Error> {
writer.write_char(COMMA)?;
// convert Vec<String> to [&str]
let v: Vec<&str> = arguments.iter().map(|x| &**x).collect();
write_array_elements(
writer,
true,
&BRACKET_OPEN.to_string(),
&BRACKET_CLOSE.to_string(),
&v,
)?;
Ok(())
}
pub fn write_enviroment(
writer: &mut impl Write,
environment: &BTreeMap<String, String>,
) -> Result<(), fmt::Error> {
writer.write_char(COMMA)?;
writer.write_char(BRACKET_OPEN)?;
for (ii, (key, environment)) in environment.iter().enumerate() {
if ii > 0 {
writer.write_char(COMMA)?;
}
// TODO(jrhahn) add strip option
write_array_elements(
writer,
false,
&PAREN_OPEN.to_string(),
&PAREN_CLOSE.to_string(),
&[&escape_string(key), &escape_string(environment)],
)?;
}
writer.write_char(BRACKET_CLOSE)?;
Ok(())
}
|
