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use anyhow::anyhow;
use std::path::{Path, PathBuf};
/// Return the Composer home directory, respecting `COMPOSER_HOME` and
/// falling back to the platform default (`~/.config/composer` on Unix,
/// `%APPDATA%/Composer` on Windows).
pub(crate) fn composer_home() -> String {
if let Ok(home) = std::env::var("COMPOSER_HOME") {
return home;
}
#[cfg(target_os = "windows")]
{
std::env::var("APPDATA")
.map(|p| format!("{p}/Composer"))
.unwrap_or_else(|_| "C:/ProgramData/ComposerSetup/bin".to_string())
}
#[cfg(not(target_os = "windows"))]
{
if let Ok(xdg) = std::env::var("XDG_CONFIG_HOME") {
format!("{xdg}/composer")
} else {
std::env::var("HOME")
.map(|h| format!("{h}/.config/composer"))
.unwrap_or_else(|_| "/tmp/composer".to_string())
}
}
}
/// Build the working directory path, preferring `--working-dir` over `cwd`.
pub(crate) fn working_dir(cli: &super::Cli) -> anyhow::Result<PathBuf> {
match &cli.working_dir {
Some(d) => Ok(PathBuf::from(d)),
None => Ok(std::env::current_dir()?),
}
}
/// Read a JSON file as `serde_json::Value`.
/// If the file does not exist, return a default skeleton:
/// `{"config": {}}` for global files, `{}` for local.
pub(crate) fn read_json_file(path: &Path, is_global: bool) -> anyhow::Result<serde_json::Value> {
if !path.exists() {
if is_global {
return Ok(serde_json::json!({"config": {}}));
}
return Ok(serde_json::json!({}));
}
let content = std::fs::read_to_string(path)?;
let value: serde_json::Value = serde_json::from_str(&content)
.map_err(|e| anyhow!("Failed to parse JSON from {}: {}", path.display(), e))?;
Ok(value)
}
/// Write a `serde_json::Value` back to a file with 4-space indentation + trailing newline.
pub(crate) fn write_json_file(path: &Path, value: &serde_json::Value) -> anyhow::Result<()> {
if let Some(parent) = path.parent()
&& !parent.as_os_str().is_empty()
{
std::fs::create_dir_all(parent)?;
}
mozart_core::package::write_to_file(value, path)?;
Ok(())
}
/// Add a repository entry to the `repositories` array in json.
/// If `append` is true, push to end; otherwise insert at beginning.
/// Removes any existing entry with the same name first.
pub(crate) fn add_repository(
json: &mut serde_json::Value,
name: &str,
config: serde_json::Value,
append: bool,
) {
if !json["repositories"].is_array() {
json["repositories"] = serde_json::json!([]);
}
remove_repository(json, name);
let repos = json["repositories"].as_array_mut().unwrap();
if append {
repos.push(config);
} else {
repos.insert(0, config);
}
}
/// Remove a repository entry by name from the `repositories` array.
pub(crate) fn remove_repository(json: &mut serde_json::Value, name: &str) {
if let Some(repos) = json["repositories"].as_array_mut() {
repos.retain(|entry| {
if let Some(entry_name) = entry.get("name").and_then(|n| n.as_str()) {
entry_name != name
} else {
let disabled_key_matches = entry
.as_object()
.map(|obj| obj.contains_key(name))
.unwrap_or(false);
!disabled_key_matches
}
});
}
}
/// Insert a repository entry before or after a named repository.
/// Returns an error if the target repository is not found.
pub(crate) fn insert_repository(
json: &mut serde_json::Value,
name: &str,
config: serde_json::Value,
target: &str,
before: bool,
) -> anyhow::Result<()> {
if !json["repositories"].is_array() {
json["repositories"] = serde_json::json!([]);
}
remove_repository(json, name);
let repos = json["repositories"].as_array_mut().unwrap();
let pos = repos
.iter()
.position(|entry| {
entry.get("name").and_then(|n| n.as_str()) == Some(target)
|| entry
.as_object()
.map(|obj| obj.contains_key(target))
.unwrap_or(false)
})
.ok_or_else(|| anyhow!("Repository \"{target}\" not found"))?;
let insert_pos = if before { pos } else { pos + 1 };
repos.insert(insert_pos, config);
Ok(())
}
/// Render a `serde_json::Value` as a human-readable string suitable for
/// single-line display (matching Composer's behaviour).
pub(crate) fn render_value(v: &serde_json::Value) -> String {
match v {
serde_json::Value::Null => "NULL".to_string(),
serde_json::Value::Bool(b) => if *b { "true" } else { "false" }.to_string(),
serde_json::Value::Number(n) => n.to_string(),
serde_json::Value::String(s) => s.clone(),
serde_json::Value::Array(arr) => {
arr.iter().map(render_value).collect::<Vec<_>>().join(", ")
}
serde_json::Value::Object(obj) => {
if obj.is_empty() {
"{}".to_string()
} else {
serde_json::to_string(v).unwrap_or_else(|_| "{}".to_string())
}
}
}
}
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