url.go

     1  // Copyright 2023 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package analysisflags
     6  
     7  import (
     8  	"fmt"
     9  	"net/url"
    10  
    11  	"golang.org/x/tools/go/analysis"
    12  )
    13  
    14  // ResolveURL resolves the URL field for a Diagnostic from an Analyzer
    15  // and returns the URL. See Diagnostic.URL for details.
    16  func ResolveURL(a *analysis.Analyzer, d analysis.Diagnostic) (string, error) {
    17  	if d.URL == "" && d.Category == "" && a.URL == "" {
    18  		return "", nil // do nothing
    19  	}
    20  	raw := d.URL
    21  	if d.URL == "" && d.Category != "" {
    22  		raw = "#" + d.Category
    23  	}
    24  	u, err := url.Parse(raw)
    25  	if err != nil {
    26  		return "", fmt.Errorf("invalid Diagnostic.URL %q: %s", raw, err)
    27  	}
    28  	base, err := url.Parse(a.URL)
    29  	if err != nil {
    30  		return "", fmt.Errorf("invalid Analyzer.URL %q: %s", a.URL, err)
    31  	}
    32  	return base.ResolveReference(u).String(), nil
    33  }
    34
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