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A compiler for generating reliability artifacts from service expectation definitions.
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src/caffeine_lang/frontend/pipeline.gleam
/// Frontend pipeline for compiling .caffeine files to JSON.
/// This module orchestrates the tokenizer, parser, validator, and generator
/// to transform .caffeine source files into JSON for the compiler backend.
import caffeine_lang/common/errors.{type CompilationError}
import caffeine_lang/frontend/generator
import caffeine_lang/frontend/parser
import caffeine_lang/frontend/parser_error
import caffeine_lang/frontend/validator
import gleam/json
import gleam/result
import simplifile
/// Compiles a blueprints .caffeine file to JSON string.
@internal
pub fn compile_blueprints_file(
file_path: String,
) -> Result(String, CompilationError) {
use source <- result.try(read_file(file_path))
use ast <- result.try(
parser.parse_blueprints_file(source)
|> result.map_error(fn(err) {
parser_error_to_compilation_error(err, file_path)
}),
)
use validated <- result.try(
validator.validate_blueprints_file(ast)
|> result.map_error(fn(err) {
validator_error_to_compilation_error(err, file_path)
}),
)
Ok(json.to_string(generator.generate_blueprints_json(validated)))
}
/// Compiles an expects .caffeine file to JSON string.
@internal
pub fn compile_expects_file(
file_path: String,
) -> Result(String, CompilationError) {
use source <- result.try(read_file(file_path))
use ast <- result.try(
parser.parse_expects_file(source)
|> result.map_error(fn(err) {
parser_error_to_compilation_error(err, file_path)
}),
)
use validated <- result.try(
validator.validate_expects_file(ast)
|> result.map_error(fn(err) {
validator_error_to_compilation_error(err, file_path)
}),
)
Ok(json.to_string(generator.generate_expects_json(validated)))
}
fn read_file(file_path: String) -> Result(String, CompilationError) {
simplifile.read(file_path)
|> result.map_error(fn(err) {
errors.ParserFileReadError(
simplifile.describe_error(err) <> " (" <> file_path <> ")",
)
})
}
fn parser_error_to_compilation_error(
err: parser_error.ParserError,
file_path: String,
) -> CompilationError {
errors.FrontendParseError(file_path <> ": " <> parser_error.to_string(err))
}
fn validator_error_to_compilation_error(
err: validator.ValidatorError,
file_path: String,
) -> CompilationError {
errors.FrontendValidationError(
file_path <> ": " <> validator_error_to_string(err),
)
}
fn validator_error_to_string(err: validator.ValidatorError) -> String {
case err {
validator.DuplicateExtendable(name) -> "Duplicate extendable: " <> name
validator.UndefinedExtendable(name, referenced_by) ->
"Undefined extendable '"
<> name
<> "' referenced by '"
<> referenced_by
<> "'"
validator.DuplicateExtendsReference(name, referenced_by) ->
"Duplicate extends reference '"
<> name
<> "' in '"
<> referenced_by
<> "'"
validator.InvalidExtendableKind(name, expected, got) ->
"Invalid extendable kind for '"
<> name
<> "': expected "
<> expected
<> ", got "
<> got
}
}