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//! ref: composer/src/Composer/Util/Tar.php
use indexmap::IndexMap;
use shirabe_php_shim::{PharData, RuntimeException};
pub struct Tar;
impl Tar {
pub fn get_composer_json(path_to_archive: &str) -> anyhow::Result<Option<String>> {
let phar = PharData::new(path_to_archive)?;
if !phar.valid() {
return Ok(None);
}
Ok(Some(Self::extract_composer_json_from_folder(&phar)?))
}
/// The content bytes are decoded strictly: a composer.json that is not valid
/// UTF-8 could never survive the JSON parsing that follows in PHP either.
fn content_to_string(content: Vec<u8>) -> anyhow::Result<String> {
String::from_utf8(content).map_err(|_| {
RuntimeException::new("composer.json in the archive is not valid UTF-8".to_string())
.into()
})
}
fn extract_composer_json_from_folder(phar: &PharData) -> anyhow::Result<String> {
if let Some(file) = phar.get("composer.json") {
return Self::content_to_string(file.get_content());
}
let mut top_level_paths: IndexMap<String, bool> = IndexMap::new();
for folder_file in phar.iter() {
let name = folder_file.get_basename();
if folder_file.is_dir() {
top_level_paths.insert(name, true);
if top_level_paths.len() > 1 {
return Err(RuntimeException::new(format!(
"Archive has more than one top level directories, and no composer.json was found on the top level, so it's an invalid archive. Top level paths found were: {}",
top_level_paths
.keys()
.cloned()
.collect::<Vec<_>>()
.join(",")
)).into());
}
}
}
let composer_json_path = format!(
"{}/composer.json",
top_level_paths.keys().next().cloned().unwrap_or_default()
);
if !top_level_paths.is_empty()
&& let Some(file) = phar.get(&composer_json_path)
{
return Self::content_to_string(file.get_content());
}
Err(RuntimeException::new(
"No composer.json found either at the top level or within the topmost directory"
.to_string(),
)
.into())
}
}
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