Merge pull request #61 from concourse/provide-timestamp

Provide a file that contains the timestamp

README.md

@@ -73,8 +73,9 @@ given version, or if there is no version given.
 
 ### `in`: Report the given time.
 
-Fetches the given timestamp, writing the request's metadata to `input` in the
-destination.
+Fetches the given timestamp. Creates two files:
+1. `input` which contains the request provided by Concourse
+1. `timestamp` which contains the fetched version in the following format: `2006-01-02 15:04:05.999999999 -0700 MST`
 
 #### Parameters
 

in_command.go

@@ -36,6 +36,12 @@ func (*InCommand) Run(destination string, request models.InRequest) (models.InRe
 		versionTime = time.Now()
 	}
 
+	timeFile, err := os.Create(filepath.Join(destination, "timestamp"))
+	if err != nil {
+		return models.InResponse{}, fmt.Errorf("creating input file: %w", err)
+	}
+	timeFile.WriteString(versionTime.Format("2006-01-02 15:04:05.999999999 -0700 MST"))
+
 	inVersion := models.Version{Time: versionTime}
 	response := models.InResponse{Version: inVersion}
 

in_command_test.go

@@ -74,6 +74,15 @@ var _ = Describe("In", func() {
 			Expect(requested.Source).To(Equal(source))
 		})
 
+		It("writes the requested version to the destination", func() {
+			input, err := os.ReadFile(filepath.Join(destination, "timestamp"))
+			Expect(err).NotTo(HaveOccurred())
+
+			givenTime, err := time.Parse("2006-01-02 15:04:05.999999999 -0700 MST", string(input))
+			Expect(err).NotTo(HaveOccurred())
+			Expect(givenTime.Unix()).To(Equal(version.Time.Unix()))
+		})
+
 		Context("when the request has no time in its version", func() {
 			BeforeEach(func() {
 				version = models.Version{}