Fix so hugo get -u updates transitively

Author: razonyang

modules/client.go

@@ -318,22 +318,41 @@ func (c *Client) Get(args ...string) error {
 		patch := update && (args[0] == "-u=patch") //
 
 		// We need to be explicit about the modules to get.
-		for _, m := range c.moduleConfig.Imports {
-			if !isProbablyModule(m.Path) {
-				// Skip themes/components stored below /themes etc.
-				// There may be false positives in the above, but those
-				// should be rare, and they will fail below with an
-				// "cannot find module providing ..." message.
-				continue
+		var modules []string
+		// Update all active modules if the -u flag presents.
+		if update {
+			mc, coll := c.collect(true)
+			if coll.err != nil {
+				return coll.err
 			}
+			for _, m := range mc.AllModules {
+				if m.Owner() == nil {
+					continue
+				}
+				modules = append(modules, m.Path())
+			}
+		} else {
+			for _, m := range c.moduleConfig.Imports {
+				if !isProbablyModule(m.Path) {
+					// Skip themes/components stored below /themes etc.
+					// There may be false positives in the above, but those
+					// should be rare, and they will fail below with an
+					// "cannot find module providing ..." message.
+					continue
+				}
+				modules = append(modules, m.Path)
+			}
+		}
+
+		for _, m := range modules {
 			var args []string
 
 			if update && !patch {
 				args = append(args, "-u")
 			} else if update && patch {
 				args = append(args, "-u=patch")
 			}
-			args = append(args, m.Path)
+			args = append(args, m)
 
 			if err := c.get(args...); err != nil {
 				return err

testscripts/commands/mod_get.txt

@@ -0,0 +1,15 @@
+hugo mod get
+stderr 'withhugotoml.*v1.1.0'
+
+-- hugo.toml --
+title = "Hugo Modules Test"
+[module]
+[[module.imports]]
+path="github.com/gohugoio/hugo-mod-integrationtests/withconfigtoml"
+disable = true
+[[module.imports]]
+path="github.com/gohugoio/hugo-mod-integrationtests/withhugotoml"
+-- go.mod --
+module foo
+go 1.20
+

testscripts/commands/mod_get_u.txt

@@ -0,0 +1,20 @@
+hugo mod get -u
+hugo mod graph
+stdout 'commonmod@v1.0.1.*commonmod2@v1.0.2'
+
+-- hugo.toml --
+title = "Hugo Modules Update Test"
+[module]
+[[module.imports]]
+path="github.com/gohugoio/hugo-mod-integrationtests/withconfigtoml"
+disable = true
+[[module.imports]]
+path="github.com/gohugoio/hugo-mod-integrationtests/withhugotoml"
+-- go.mod --
+module foo
+go 1.20
+require (
+  github.com/gohugoio/hugo-mod-integrationtests/withhugotoml v1.1.0 // indirect
+  github.com/gohugoio/hugo-mod-integrationtests/commonmod v0.0.0-20230823103305-919cefe8a425 // indirect
+)
+