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package gitattr
type MacroProcessor struct {
macros map[string][]*Attr
}
// NewMacroProcessor returns a new MacroProcessor object for parsing macros.
func NewMacroProcessor() *MacroProcessor {
macros := make(map[string][]*Attr)
// This is built into Git.
macros["binary"] = []*Attr{
&Attr{K: "diff", V: "false"},
&Attr{K: "merge", V: "false"},
&Attr{K: "text", V: "false"},
}
return &MacroProcessor{
macros: macros,
}
}
// ProcessLines reads the specified lines, returning a new set of lines which
// all have a valid pattern. If readMacros is true, it additionally loads any
// macro lines as it reads them.
func (mp *MacroProcessor) ProcessLines(lines []*Line, readMacros bool) []*Line {
result := make([]*Line, 0, len(lines))
for _, line := range lines {
if line.Pattern != nil {
resultLine := Line{
Pattern: line.Pattern,
Attrs: make([]*Attr, 0, len(line.Attrs)),
}
for _, attr := range line.Attrs {
macros := mp.macros[attr.K]
if attr.V == "true" && macros != nil {
resultLine.Attrs = append(
resultLine.Attrs,
macros...,
)
}
// Git copies through aliases as well as
// expanding them.
resultLine.Attrs = append(
resultLine.Attrs,
attr,
)
}
result = append(result, &resultLine)
} else if readMacros {
mp.macros[line.Macro] = line.Attrs
}
}
return result
}
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