deploy: Fix deploy defaults for non-zero flag values (e.g. maxDeletes, invalidateCDN)

This was broken in the config rewrite in Hugo 0.112.0.

The workaround is to be explicit about setting these flag values (even if just using the defaults), e.g.:

```
hugo deploy --invalidateCDN --maxDeletes 256
```

Fixes #11127

commands/deploy.go

@@ -63,9 +63,9 @@ documentation.
 			cmd.Flags().Bool("confirm", false, "ask for confirmation before making changes to the target")
 			cmd.Flags().Bool("dryRun", false, "dry run")
 			cmd.Flags().Bool("force", false, "force upload of all files")
-			cmd.Flags().Bool("invalidateCDN", true, "invalidate the CDN cache listed in the deployment target")
-			cmd.Flags().Int("maxDeletes", 256, "maximum # of files to delete, or -1 to disable")
-			cmd.Flags().Int("workers", 10, "number of workers to transfer files. defaults to 10")
+			cmd.Flags().Bool("invalidateCDN", deploy.DefaultConfig.InvalidateCDN, "invalidate the CDN cache listed in the deployment target")
+			cmd.Flags().Int("maxDeletes", deploy.DefaultConfig.MaxDeletes, "maximum # of files to delete, or -1 to disable")
+			cmd.Flags().Int("workers", deploy.DefaultConfig.Workers, "number of workers to transfer files. defaults to 10")
 		},
 	}
 }

deploy/deployConfig.go

@@ -127,11 +127,16 @@ func (m *Matcher) Matches(path string) bool {
 	return m.re.MatchString(path)
 }
 
+var DefaultConfig = DeployConfig{
+	Workers:       10,
+	InvalidateCDN: true,
+	MaxDeletes:    256,
+}
+
 // DecodeConfig creates a config from a given Hugo configuration.
 func DecodeConfig(cfg config.Provider) (DeployConfig, error) {
-	var (
-		dcfg DeployConfig
-	)
+
+	dcfg := DefaultConfig
 
 	if !cfg.IsSet(deploymentConfigKey) {
 		return dcfg, nil

testscripts/commands/deploy.txt

@@ -3,10 +3,10 @@
 hugo deploy -h
 stdout 'Deploy your site to a Cloud provider\.'
 mkdir mybucket
-hugo deploy --target mydeployment
+hugo deploy --target mydeployment --invalidateCDN=false
 grep 'hello' mybucket/index.html
 replace  public/index.html 'hello' 'changed'
-hugo deploy --target mydeployment --invalidateCDN --dryRun
+hugo deploy --target mydeployment --dryRun
 stdout 'Would upload: index.html'
 stdout 'Would invalidate CloudFront CDN with ID foobar'
 -- hugo.toml --