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68 lines
2.3 KiB
Go
68 lines
2.3 KiB
Go
package patch
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import "fmt"
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// Example hunk:
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// @@ -16,2 +14,3 @@ func (f *CommitFile) Description() string {
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// return f.Name
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// -}
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// +
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// +// test
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type Hunk struct {
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// the line number of the first line in the old file ('16' in the above example)
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oldStart int
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// the line number of the first line in the new file ('14' in the above example)
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newStart int
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// the context at the end of the header line (' func (f *CommitFile) Description() string {' in the above example)
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headerContext string
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// the body of the hunk, excluding the header line
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bodyLines []*PatchLine
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}
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// Returns the number of lines in the hunk in the original file ('2' in the above example)
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func (self *Hunk) oldLength() int {
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return nLinesWithKind(self.bodyLines, []PatchLineKind{CONTEXT, DELETION})
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}
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// Returns the number of lines in the hunk in the new file ('3' in the above example)
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func (self *Hunk) newLength() int {
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return nLinesWithKind(self.bodyLines, []PatchLineKind{CONTEXT, ADDITION})
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}
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// Returns true if the hunk contains any changes (i.e. if it's not just a context hunk).
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// We'll end up with a context hunk if we're transforming a patch and one of the hunks
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// has no selected lines.
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func (self *Hunk) containsChanges() bool {
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return nLinesWithKind(self.bodyLines, []PatchLineKind{ADDITION, DELETION}) > 0
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}
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// Returns the number of lines in the hunk, including the header line
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func (self *Hunk) lineCount() int {
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return len(self.bodyLines) + 1
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}
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// Returns all lines in the hunk, including the header line
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func (self *Hunk) allLines() []*PatchLine {
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lines := []*PatchLine{{Content: self.formatHeaderLine(), Kind: HUNK_HEADER}}
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lines = append(lines, self.bodyLines...)
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return lines
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}
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// Returns the header line, including the unified diff header and the context
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func (self *Hunk) formatHeaderLine() string {
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return fmt.Sprintf("%s%s", self.formatHeaderStart(), self.headerContext)
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}
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// Returns the first part of the header line i.e. the unified diff part (excluding any context)
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func (self *Hunk) formatHeaderStart() string {
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newLengthDisplay := ""
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newLength := self.newLength()
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// if the new length is 1, it's omitted
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if newLength != 1 {
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newLengthDisplay = fmt.Sprintf(",%d", newLength)
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}
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return fmt.Sprintf("@@ -%d,%d +%d%s @@", self.oldStart, self.oldLength(), self.newStart, newLengthDisplay)
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}
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