109 lines
2.2 KiB
Go
109 lines
2.2 KiB
Go
package command
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import (
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"fmt"
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"os"
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"strings"
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"github.com/cli/cli/utils"
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"github.com/spf13/cobra"
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)
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var prDiffCmd = &cobra.Command{
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Use: "diff {<number> | <url>}",
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Short: "View a pull request's changes.",
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RunE: prDiff,
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}
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func init() {
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prDiffCmd.Flags().StringP("color", "c", "auto", "Whether or not to output color: {always|never|auto}")
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prCmd.AddCommand(prDiffCmd)
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}
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func prDiff(cmd *cobra.Command, args []string) error {
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color, err := cmd.Flags().GetString("color")
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if err != nil {
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return err
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}
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if !validColorFlag(color) {
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return fmt.Errorf("did not understand color: %q. Expected one of always, never, or auto", color)
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}
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ctx := contextForCommand(cmd)
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apiClient, err := apiClientForContext(ctx)
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if err != nil {
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return err
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}
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baseRepo, err := determineBaseRepo(apiClient, cmd, ctx)
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if err != nil {
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return fmt.Errorf("could not determine base repo: %w", err)
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}
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pr, err := prFromArgs(ctx, apiClient, baseRepo, args)
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if err != nil {
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return fmt.Errorf("could not find pull request: %w", err)
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}
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diff, err := apiClient.PullRequestDiff(baseRepo, pr.Number)
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if err != nil {
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return fmt.Errorf("could not find pull request diff: %w", err)
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}
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out := cmd.OutOrStdout()
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if color == "auto" {
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color = "never"
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isTTY := false
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if outFile, isFile := out.(*os.File); isFile {
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isTTY = utils.IsTerminal(outFile)
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if isTTY {
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color = "always"
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}
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}
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}
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if color == "never" {
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fmt.Fprint(out, diff)
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return nil
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}
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out = colorableOut(cmd)
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for _, diffLine := range strings.Split(diff, "\n") {
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output := diffLine
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switch {
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case isHeaderLine(diffLine):
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output = utils.Bold(diffLine)
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case isAdditionLine(diffLine):
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output = utils.Green(diffLine)
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case isRemovalLine(diffLine):
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output = utils.Red(diffLine)
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}
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fmt.Fprintln(out, output)
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}
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return nil
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}
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func isHeaderLine(dl string) bool {
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prefixes := []string{"+++", "---", "diff", "index"}
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for _, p := range prefixes {
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if strings.HasPrefix(dl, p) {
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return true
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}
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}
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return false
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}
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func isAdditionLine(dl string) bool {
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return strings.HasPrefix(dl, "+")
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}
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func isRemovalLine(dl string) bool {
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return strings.HasPrefix(dl, "-")
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}
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func validColorFlag(c string) bool {
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return c == "auto" || c == "always" || c == "never"
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}
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