Podman Build use absolute filepath

podman build always finds the abs path but was never using it for the containerfile path. This
was causing the remote client to be given a relative path that does not exist. Switch to evaluating and using absolute paths only.

resolves #12841

Signed-off-by: cdoern <cdoern@redhat.com>

cmd/podman/images/build.go

@@ -257,6 +257,7 @@ func build(cmd *cobra.Command, args []string) error {
 				return errors.Wrapf(err, "error determining path to file %q", containerFiles[i])
 			}
 			contextDir = filepath.Dir(absFile)
+			containerFiles[i] = absFile
 			break
 		}
 	}
@@ -289,7 +290,6 @@ func build(cmd *cobra.Command, args []string) error {
 	if err != nil {
 		return err
 	}
-
 	report, err := registry.ImageEngine().Build(registry.GetContext(), containerFiles, *apiBuildOpts)
 
 	if err != nil {

test/e2e/build_test.go

@@ -691,4 +691,19 @@ RUN ls /dev/test1`, ALPINE)
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 	})
+
+	It("podman build use absolute path even if given relative", func() {
+		containerFile := fmt.Sprintf(`FROM %s`, ALPINE)
+		err = os.Mkdir("relative", 0755)
+		Expect(err).To(BeNil())
+		containerFilePath := filepath.Join("relative", "Containerfile")
+		fmt.Println(containerFilePath)
+		err = ioutil.WriteFile(containerFilePath, []byte(containerFile), 0755)
+		Expect(err).To(BeNil())
+		build := podmanTest.Podman([]string{"build", "-f", "./relative/Containerfile"})
+		build.WaitWithDefaultTimeout()
+		Expect(build).To(Exit(0))
+		err = os.RemoveAll("relative")
+		Expect(err).To(BeNil())
+	})
 })