5a6c581a7e
This change ensures that Stack semantic version numbers specified in Mufiles are correct. Note that we do not accept ranges for the version number itself, although obviously when checking dependencies we will permit it.
47 lines
1.2 KiB
Go
47 lines
1.2 KiB
Go
// Copyright 2016 Marapongo, Inc. All rights reserved.
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package compiler
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import (
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"github.com/blang/semver"
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"github.com/marapongo/mu/pkg/ast"
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"github.com/marapongo/mu/pkg/diag"
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"github.com/marapongo/mu/pkg/errors"
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)
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// PTAnalyzer knows how to walk and validate parse trees.
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type PTAnalyzer interface {
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// Diag fetches the diagnostics sink used by this analyzer.
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Diag() diag.Sink
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// Analyze checks the validity of an entire parse tree (starting with a top-level Stack).
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Analyze(doc *diag.Document, stack *ast.Stack)
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}
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// NewPTAnalayzer allocates a new PTAnalyzer associated with the given Compiler.
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func NewPTAnalyzer(c Compiler) PTAnalyzer {
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return &ptAnalyzer{c: c}
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}
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type ptAnalyzer struct {
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c Compiler
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}
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func (a *ptAnalyzer) Diag() diag.Sink {
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return a.c.Diag()
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}
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func (a *ptAnalyzer) Analyze(doc *diag.Document, stack *ast.Stack) {
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// Stacks must have names.
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if stack.Name == "" {
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a.Diag().Errorf(errors.MissingStackName.WithDocument(doc))
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}
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// Stack versions must be valid semantic versions (and specifically, not ranges).
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if stack.Version != "" {
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if _, err := semver.Parse(string(stack.Version)); err != nil {
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a.Diag().Errorf(errors.IllegalStackSemVer.WithDocument(doc), stack.Version)
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}
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}
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}
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