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build: allow using cache explicitly with --squash-all using --layers

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Buildah already supports using `--layers` with `--squash` after https://github.com/containers/buildah/pull/3674
if user wants to do so hence podman must honor similar configuration
in `--squash-all` behaviour if user wants to using cache.

PS: We cannot alter behaviour of `podman build --squash` for
docker-compat reasons hence this feature can be easily supported by
`--squash-all`.

Closes: https://github.com/containers/buildah/issues/4011

Signed-off-by: Aditya R <arajan@redhat.com>
This commit is contained in:
Aditya R
2022-05-23 15:47:22 +05:30
parent b730e7328e
commit 6124b51993
2 changed files with 34 additions and 3 deletions
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9
cmd/podman/images/build.go
View File

@ -197,9 +197,8 @@ func buildFlags(cmd *cobra.Command) {
// build executes the build command.
func build(cmd *cobra.Command, args []string) error {
if (cmd.Flags().Changed("squash") && cmd.Flags().Changed("layers")) ||
(cmd.Flags().Changed("squash-all") && cmd.Flags().Changed("layers")) ||
(cmd.Flags().Changed("squash-all") && cmd.Flags().Changed("squash")) {
return errors.New("cannot specify --squash, --squash-all and --layers options together")
return errors.New("cannot specify --squash with --layers and --squash-all with --squash")
}
if cmd.Flag("output").Changed && registry.IsRemote() {
@ -418,8 +417,14 @@ func buildFlagsWrapperToOptions(c *cobra.Command, contextDir string, flags *buil
// Squash-all invoked, squash both new and old layers into one.
if c.Flags().Changed("squash-all") {
flags.Squash = true
if !c.Flags().Changed("layers") {
// Buildah supports using layers and --squash together
// after https://github.com/containers/buildah/pull/3674
// so podman must honor if user wants to still use layers
// with --squash-all.
flags.Layers = false
}
}
var stdin io.Reader
if flags.Stdin {

26
test/e2e/build_test.go
View File

@ -178,6 +178,32 @@ var _ = Describe("Podman build", func() {
Expect(session).Should(Exit(0))
})
It("podman build verify explicit cache use with squash-all and --layers", func() {
session := podmanTest.Podman([]string{"build", "--pull-never", "-f", "build/squash/Dockerfile.squash-c", "--squash-all", "--layers", "-t", "test-squash-d:latest", "build/squash"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
session = podmanTest.Podman([]string{"inspect", "--format", "{{.RootFS.Layers}}", "test-squash-d"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
// Check for one layers
Expect(strings.Fields(session.OutputToString())).To(HaveLen(1))
// Second build must use last squashed build from cache
session = podmanTest.Podman([]string{"build", "--pull-never", "-f", "build/squash/Dockerfile.squash-c", "--squash-all", "--layers", "-t", "test", "build/squash"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
// Test if entire build is used from cache
Expect(session.OutputToString()).To(ContainSubstring("Using cache"))
session = podmanTest.Podman([]string{"inspect", "--format", "{{.RootFS.Layers}}", "test-squash-d"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
// Check for one layers
Expect(strings.Fields(session.OutputToString())).To(HaveLen(1))
})
It("podman build Containerfile locations", func() {
// Given
// Switch to temp dir and restore it afterwards