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package api
import (
"bufio"
"os"
"regexp"
"strconv"
"strings"
"github.com/thepeterstone/claudomator/internal/task"
)
// gitDiffStatRe matches git diff --stat summary lines, e.g.:
//
// "3 files changed, 50 insertions(+), 10 deletions(-)"
// "1 file changed, 5 insertions(+)"
// "1 file changed, 3 deletions(-)"
var gitDiffStatRe = regexp.MustCompile(`(\d+) files? changed(?:, (\d+) insertions?\(\+\))?(?:, (\d+) deletions?\(-\))?`)
// parseChangestatFromOutput scans text for git diff --stat summary lines and
// returns the first match as a Changestats value. Returns nil if no match found.
func parseChangestatFromOutput(output string) *task.Changestats {
scanner := bufio.NewScanner(strings.NewReader(output))
for scanner.Scan() {
line := scanner.Text()
if m := gitDiffStatRe.FindStringSubmatch(line); m != nil {
cs := &task.Changestats{}
cs.FilesChanged, _ = strconv.Atoi(m[1])
if m[2] != "" {
cs.LinesAdded, _ = strconv.Atoi(m[2])
}
if m[3] != "" {
cs.LinesRemoved, _ = strconv.Atoi(m[3])
}
return cs
}
}
return nil
}
// parseChangestatFromFile reads a log file and extracts the first git diff stat
// summary it finds. Returns nil if the file cannot be read or contains no match.
func parseChangestatFromFile(path string) *task.Changestats {
data, err := os.ReadFile(path)
if err != nil {
return nil
}
return parseChangestatFromOutput(string(data))
}
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