65 lines
1.4 KiB
Go
65 lines
1.4 KiB
Go
package salix
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import (
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"errors"
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"go.elara.ws/salix/ast"
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)
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var (
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ErrIncludeInvalidArgs = errors.New("include expects one string argument")
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ErrNoSuchTemplate = errors.New("no such template")
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)
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// includeTag represents an #include tag within a Salix template
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type includeTag struct{}
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func (it includeTag) Run(tc *TagContext, block, args []ast.Node) error {
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if len(args) < 1 {
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return tc.PosError(tc.Tag, "expected at least one argument, got %d", len(args))
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}
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val, err := tc.GetValue(args[0], nil)
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if err != nil {
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return err
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}
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name, ok := val.(string)
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if !ok {
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return tc.PosError(args[0], "invalid first argument type: %T (expected string)", val)
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}
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ignoreMissing := false
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if name[0] == '?' {
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name = name[1:]
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ignoreMissing = true
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}
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tmpl, ok := tc.t.ns.GetTemplate(name)
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if !ok {
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if ignoreMissing {
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return nil
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}
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return tc.PosError(args[0], "no such template: %q", name)
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}
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local := map[string]any{}
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// Use the variable assignments after the first argument
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// to set the local variables of the execution
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for _, arg := range args[1:] {
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if a, ok := arg.(ast.Assignment); ok {
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val, err := tc.GetValue(a.Value, local)
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if err != nil {
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return err
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}
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local[a.Name.Value] = val
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} else {
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// If the argument isn't an assigment, return an error
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return tc.PosError(tc.Tag, "invalid argument type: %T (expected ast.Assignment)", val)
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}
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}
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return tc.Execute(tmpl.ast, local)
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}
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