wehub-resource-sync
46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
package parser
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import (
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"fmt"
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"path/filepath"
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"github.com/kashav/fsql/tokenizer"
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)
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// parseSourceList parses the list of directories passed to the FROM clause. If
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// a source is followed by the AS keyword, the following word is registered as
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// an alias.
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func (p *parser) parseSourceList(sources *map[string][]string,
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aliases *map[string]string) error {
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for {
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// If the next token is a hypen, exclude this directory.
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sourceType := "include"
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if token := p.expect(tokenizer.Hyphen); token != nil {
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sourceType = "exclude"
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}
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source := p.expect(tokenizer.Identifier)
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if source == nil {
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return p.currentError()
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}
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source.Raw = filepath.Clean(source.Raw)
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(*sources)[sourceType] = append((*sources)[sourceType], source.Raw)
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if token := p.expect(tokenizer.As); token != nil {
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alias := p.expect(tokenizer.Identifier)
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if alias == nil {
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return p.currentError()
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}
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if sourceType == "exclude" {
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return fmt.Errorf("cannot alias excluded directory %s", source.Raw)
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}
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(*aliases)[alias.Raw] = source.Raw
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}
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if p.expect(tokenizer.Comma) == nil {
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break
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}
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}
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return nil
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}
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