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use crate::{derivation::Derivation, write::DOT_FILE_EXT};
use anyhow::bail;
use tvix_store::nixpath::NixPath;
impl Derivation {
/// validate ensures a Derivation struct is properly populated,
/// and returns an error if not.
/// TODO(flokli): make this proper errors
pub fn validate(&self) -> anyhow::Result<()> {
// Ensure the number of outputs is > 1
if self.outputs.is_empty() {
bail!("0 outputs");
}
// Validate all outputs
for (output_name, output) in &self.outputs {
if output_name.is_empty() {
bail!("output_name from outputs may not be empty")
}
if output.is_fixed() {
if self.outputs.len() != 1 {
bail!("encountered fixed-output, but there's more than 1 output in total");
}
if output_name != "out" {
bail!("the fixed-output output name must be called 'out'");
}
break;
}
output.validate()?;
}
// Validate all input_derivations
for (input_derivation_path, output_names) in &self.input_derivations {
// Validate input_derivation_path
NixPath::from_absolute_path(input_derivation_path)?;
if !input_derivation_path.ends_with(DOT_FILE_EXT) {
bail!(
"derivation {} does not end with .drv",
input_derivation_path
);
}
if output_names.is_empty() {
bail!(
"output_names list for {} may not be empty",
input_derivation_path
);
}
for (i, output_name) in output_names.iter().enumerate() {
if output_name.is_empty() {
bail!(
"output name entry for {} may not be empty",
input_derivation_path
)
}
// if i is at least 1, peek at the previous element to ensure output_names are sorted.
if i > 0 && (output_names[i - 1] >= *output_name) {
bail!(
"invalid input derivation output order: {} < {}",
output_name,
output_names[i - 1],
);
}
}
}
// Validate all input_sources
for (i, input_source) in self.input_sources.iter().enumerate() {
NixPath::from_absolute_path(input_source)?;
if i > 0 && self.input_sources[i - 1] >= *input_source {
bail!(
"invalid input source order: {} < {}",
input_source,
self.input_sources[i - 1],
);
}
}
// validate platform
if self.system.is_empty() {
bail!("required attribute 'platform' missing");
}
// validate builder
if self.builder.is_empty() {
bail!("required attribute 'builder' missing");
}
// validate env, none of the keys may be empty.
// We skip the `name` validation seen in go-nix.
for k in self.environment.keys() {
if k.is_empty() {
bail!("found empty environment variable key");
}
}
Ok(())
}
}
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