fix(devtools/cmd/migrate-sidekick): parse commit SHA and checksum from .sidekick.toml (#3211)

Parse discovery and googleapis commit SHA and checksum from
`.sidekick.toml`

Fixes #3121

Author: JoeWang1127

devtools/cmd/migrate-sidekick/main.go

@@ -33,7 +33,10 @@ import (
 )
 
 const (
-	sidekickFile = ".sidekick.toml"
+	sidekickFile            = ".sidekick.toml"
+	discoveryArchivePrefix  = "https://github.com/googleapis/discovery-artifact-manager/archive/"
+	googleapisArchivePrefix = "https://github.com/googleapis/googleapis/archive/"
+	tarballSuffix           = ".tar.gz"
 )
 
 var (
@@ -142,8 +145,13 @@ func readRootSidekick(repoPath string) (*config.Config, error) {
 
 	releaseLevel, _ := sidekick.Codec["release-level"].(string)
 	warnings, _ := sidekick.Codec["disabled-rustdoc-warnings"].(string)
-	googleapisCommitSHA, _ := sidekick.Source["googleapis-sha256"].(string)
-	discoveryCommitSHA, _ := sidekick.Source["discovery-sha256"].(string)
+	discoverySHA256, _ := sidekick.Source["discovery-sha256"].(string)
+	discoveryRoot, _ := sidekick.Source["discovery-root"].(string)
+	googleapisSHA256, _ := sidekick.Source["googleapis-sha256"].(string)
+	googleapisRoot, _ := sidekick.Source["googleapis-root"].(string)
+
+	discoveryCommit := strings.TrimSuffix(strings.TrimPrefix(discoveryRoot, discoveryArchivePrefix), tarballSuffix)
+	googleapisCommit := strings.TrimSuffix(strings.TrimPrefix(googleapisRoot, googleapisArchivePrefix), tarballSuffix)
 
 	// Parse package dependencies
 	packageDependencies := parsePackageDependencies(sidekick.Codec)
@@ -152,10 +160,12 @@ func readRootSidekick(repoPath string) (*config.Config, error) {
 		Language: "rust",
 		Sources: &config.Sources{
 			Discovery: &config.Source{
-				Commit: discoveryCommitSHA,
+				Commit: discoveryCommit,
+				SHA256: discoverySHA256,
 			},
 			Googleapis: &config.Source{
-				Commit: googleapisCommitSHA,
+				Commit: googleapisCommit,
+				SHA256: googleapisSHA256,
 			},
 		},
 		Default: &config.Default{

devtools/cmd/migrate-sidekick/main_test.go

@@ -36,8 +36,14 @@ func TestReadRootSidekick(t *testing.T) {
 			want: &config.Config{
 				Language: "rust",
 				Sources: &config.Sources{
-					Discovery:  &config.Source{Commit: "67c8d3792f0ebf5f0582dce675c379d0f486604eb0143814c79e788954aa1212"},
-					Googleapis: &config.Source{Commit: "839e897c39cada559b97d64f90378715a4a43fbc972d8cf93296db4156662085"},
+					Discovery: &config.Source{
+						Commit: "0bb1100f52bf0bae06f4b4d76742e7eba5c59793",
+						SHA256: "67c8d3792f0ebf5f0582dce675c379d0f486604eb0143814c79e788954aa1212",
+					},
+					Googleapis: &config.Source{
+						Commit: "fe58211356a91f4140ed51893703910db05ade91",
+						SHA256: "839e897c39cada559b97d64f90378715a4a43fbc972d8cf93296db4156662085",
+					},
 				},
 				Default: &config.Default{
 					Output:       "src/generated/",

devtools/cmd/migrate-sidekick/testdata/root-sidekick/success/.sidekick.toml

@@ -1,5 +1,7 @@
 [source]
+googleapis-root             = 'https://github.com/googleapis/googleapis/archive/fe58211356a91f4140ed51893703910db05ade91.tar.gz'
 googleapis-sha256           = '839e897c39cada559b97d64f90378715a4a43fbc972d8cf93296db4156662085'
+discovery-root              = 'https://github.com/googleapis/discovery-artifact-manager/archive/0bb1100f52bf0bae06f4b4d76742e7eba5c59793.tar.gz'
 discovery-sha256            = '67c8d3792f0ebf5f0582dce675c379d0f486604eb0143814c79e788954aa1212'
 
 [codec]