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use std::collections::HashSet;
use std::fs;
use std::path::Path;
use anyhow::{Context, Result, bail};
use serde::Deserialize;
#[derive(Debug, Clone, Deserialize, PartialEq, Eq)]
pub struct ImageSpec {
pub target: Target,
pub kernel: Kernel,
pub boot: BootSpec,
pub packages: PackageSpec,
}
#[derive(Debug, Clone, Deserialize, PartialEq, Eq)]
pub struct Target {
pub name: String,
pub architecture: Architecture,
pub format: OutputFormat,
}
#[derive(Debug, Clone, Deserialize, PartialEq, Eq)]
pub struct Kernel {
pub flavour: String,
}
#[derive(Debug, Clone, Deserialize, PartialEq, Eq)]
pub struct BootSpec {
pub initrd_features: Vec<String>,
pub initrd_modules: Vec<String>,
}
#[derive(Debug, Clone, Deserialize, PartialEq, Eq)]
pub struct PackageSpec {
pub base: Vec<String>,
pub selectors: Vec<PackageSelector>,
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct PackageSelector(String);
impl PackageSelector {
pub fn as_str(&self) -> &str {
&self.0
}
}
impl<'de> Deserialize<'de> for PackageSelector {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: serde::Deserializer<'de>,
{
let value = String::deserialize(deserializer)?;
if value.trim().is_empty() {
return Err(serde::de::Error::custom("package selector cannot be empty"));
}
Ok(Self(value))
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum Architecture {
X86_64,
}
impl Architecture {
pub fn as_str(&self) -> &'static str {
match self {
Self::X86_64 => "x86_64",
}
}
}
impl<'de> Deserialize<'de> for Architecture {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: serde::Deserializer<'de>,
{
match String::deserialize(deserializer)?.as_str() {
"x86_64" => Ok(Self::X86_64),
value => Err(serde::de::Error::custom(format!(
"unsupported architecture: {value}"
))),
}
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum OutputFormat {
Tar,
}
impl<'de> Deserialize<'de> for OutputFormat {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: serde::Deserializer<'de>,
{
match String::deserialize(deserializer)?.as_str() {
"tar" => Ok(Self::Tar),
value => Err(serde::de::Error::custom(format!(
"unsupported output format: {value}"
))),
}
}
}
impl ImageSpec {
pub fn load(path: &Path) -> Result<Self> {
let contents = fs::read_to_string(path)
.with_context(|| format!("read image specification {}", path.display()))?;
let spec: Self = toml::from_str(&contents)
.with_context(|| format!("parse image specification {}", path.display()))?;
spec.validate()?;
Ok(spec)
}
pub fn validate(&self) -> Result<()> {
if self.target.name.trim().is_empty() {
bail!("target name cannot be empty");
}
let mut selectors = HashSet::new();
for selector in &self.packages.selectors {
if !selectors.insert(selector.as_str()) {
bail!("duplicate package selector: {}", selector.as_str());
}
}
for module in &self.boot.initrd_modules {
if module.is_empty()
|| module.contains('/')
|| !module.chars().all(|character| {
character.is_ascii_alphanumeric() || matches!(character, '.' | '_' | '-')
})
{
bail!("invalid initrd module: {module}");
}
}
Ok(())
}
}
|
