compose: Remove support for boot-location: both

I'd like to add a new `boot-location: modules`.  In prep
for that, let's remove the legacy `both` which drops into
`/boot`.

The libostree support for handling `/usr/lib/ostree-boot` has
existed for over 4 years:

```
commit 37a0599
Commit:     Colin Walters <walters@verbum.org>
CommitDate: Sun Nov 30 23:14:05 2014 -0500

    deploy: Ensure that we can deploy using only /usr/lib/ostree-boot

```

I think we assume now that no one is now making *new* treecomposes and needs
a newer rpm-ostree and that they expect people to be able to use as an
upgrade target from a libostree that predates that.

Closes: #1773
Approved by: jlebon

docs/manual/treefile.md

@@ -26,13 +26,9 @@ It supports the following parameters:
  * `selinux`: boolean, optional: Defaults to `true`.  If `false`, then
    no SELinux labeling will be performed on the server side.
 
- * `boot-location` (or `boot_location`): string, optional: Historically, ostree
-    put bootloader data in /boot.  However, this has a few flaws; it gets
-    shadowed at boot time, and also makes dealing with Anaconda installation
-    harder.  There are 3 possible values:
-    * "both": the default, kernel data goes in /boot and /usr/lib/ostree-boot
-    * "legacy": Now an alias for "both"; historically meant just "boot"
-    * "new": kernel data goes in /usr/lib/ostree-boot and /usr/lib/modules
+ * `boot-location` (or `boot_location`): string, optional: If specified, this value
+    must be "new".  Historically rpm-ostree supported multiple kernel locations;
+    this is no longer the case.
 
  * `etc-group-members`: Array of strings, optional: Unix groups in this
    list will be stored in `/etc/group` instead of `/usr/lib/group`.  Use

rust/src/treefile.rs

@@ -518,17 +518,13 @@ fn whitespace_split_packages(pkgs: &[String]) -> Vec<String> {
 
 #[derive(Serialize, Deserialize, Debug, PartialEq)]
 enum BootLocation {
-    #[serde(rename = "both")]
-    Both,
-    #[serde(rename = "legacy")]
-    Legacy,
     #[serde(rename = "new")]
     New,
 }
 
 impl Default for BootLocation {
     fn default() -> Self {
-        BootLocation::Both
+        BootLocation::New
     }
 }
 
@@ -820,13 +816,13 @@ remove-files:
         let treefile = append_and_parse(
             "
 gpg_key: foo
-boot_location: both
+boot_location: new
 default_target: bar
 automatic_version_prefix: baz
         ",
         );
         assert!(treefile.gpg_key.unwrap() == "foo");
-        assert!(treefile.boot_location.unwrap() == BootLocation::Both);
+        assert!(treefile.boot_location.unwrap() == BootLocation::New);
         assert!(treefile.default_target.unwrap() == "bar");
         assert!(treefile.automatic_version_prefix.unwrap() == "baz");
     }
@@ -836,13 +832,13 @@ automatic_version_prefix: baz
         let treefile = append_and_parse(
             "
 gpg-key: foo
-boot-location: both
+boot-location: new
 default-target: bar
 automatic-version-prefix: baz
         ",
         );
         assert!(treefile.gpg_key.unwrap() == "foo");
-        assert!(treefile.boot_location.unwrap() == BootLocation::Both);
+        assert!(treefile.boot_location.unwrap() == BootLocation::New);
         assert!(treefile.default_target.unwrap() == "bar");
         assert!(treefile.automatic_version_prefix.unwrap() == "baz");
     }

src/libpriv/rpmostree-postprocess.c

@@ -50,7 +50,6 @@
 #include "rpmostree-rust.h"
 
 typedef enum {
-  RPMOSTREE_POSTPROCESS_BOOT_LOCATION_BOTH,
   RPMOSTREE_POSTPROCESS_BOOT_LOCATION_NEW
 } RpmOstreePostprocessBootLocation;
 
@@ -356,21 +355,15 @@ process_kernel_and_initramfs (int            rootfs_dfd,
     return FALSE;
 
   RpmOstreePostprocessBootLocation boot_location =
-    RPMOSTREE_POSTPROCESS_BOOT_LOCATION_BOTH;
+    RPMOSTREE_POSTPROCESS_BOOT_LOCATION_NEW;
   const char *boot_location_str = NULL;
   if (!_rpmostree_jsonutil_object_get_optional_string_member (treefile,
                                                               "boot-location",
                                                               &boot_location_str, error))
     return FALSE;
   if (boot_location_str != NULL)
     {
-      /* Make "legacy" an alias for "both" */
-      if (strcmp (boot_location_str, "both") == 0 ||
-          strcmp (boot_location_str, "legacy") == 0)
-        ;
-      else if (strcmp (boot_location_str, "new") == 0)
-        boot_location = RPMOSTREE_POSTPROCESS_BOOT_LOCATION_NEW;
-      else
+      if (!g_str_equal (boot_location_str, "new"))
         return glnx_throw (error, "Invalid boot location '%s'", boot_location_str);
     }
 
@@ -456,24 +449,6 @@ process_kernel_and_initramfs (int            rootfs_dfd,
   if (!glnx_ensure_dir (rootfs_dfd, "boot", 0755, error))
     return FALSE;
 
-  /* If the boot location includes /boot, we also need to copy /usr/lib/ostree-boot there */
-  switch (boot_location)
-    {
-    case RPMOSTREE_POSTPROCESS_BOOT_LOCATION_BOTH:
-      {
-        g_print ("Using boot location: both\n");
-        /* Hardlink the existing content, only a little ugly as
-         * we'll end up sha256'ing it twice, but oh well. */
-        if (!hardlink_recurse (rootfs_dfd, "usr/lib/ostree-boot",
-                               rootfs_dfd, "boot",
-                               cancellable, error))
-          return glnx_prefix_error (error, "hardlinking /boot");
-      }
-      break;
-    case RPMOSTREE_POSTPROCESS_BOOT_LOCATION_NEW:
-      break;
-    }
-
   return TRUE;
 }
 

tests/compose-tests/libbasic-test.sh

@@ -48,12 +48,10 @@ ostree --repo=${repobuild} show --print-metadata-key rpmostree.rpmmd-repos ${tre
 assert_file_has_content meta.txt 'id.*fedora.*timestamp'
 echo "ok metadata"
 
-for path in /boot /usr/lib/ostree-boot; do
-    ostree --repo=${repobuild} ls -R ${treeref} ${path} > bootls.txt
-    assert_file_has_content bootls.txt vmlinuz-
-    assert_file_has_content bootls.txt initramfs-
-    echo "ok boot files"
-done
+ostree --repo=${repobuild} ls -R ${treeref} /usr/lib/ostree-boot > bootls.txt
+assert_file_has_content bootls.txt vmlinuz-
+assert_file_has_content bootls.txt initramfs-
+echo "ok boot files"
 vmlinuz_line=$(grep -o '/vmlinuz.*$' bootls.txt)
 kver=$(echo ${vmlinuz_line} | sed -e 's,^/vmlinuz-,,' -e 's,-[0-9a-f]*$,,')
 ostree --repo=${repobuild} ls ${treeref} /usr/lib/modules/${kver}/vmlinuz >/dev/null

tests/compose-tests/test-installroot.sh

@@ -26,10 +26,6 @@ integrationconf=usr/lib/tmpfiles.d/rpm-ostree-0-integration.conf
 assert_not_has_file ${instroot}-postprocess/${integrationconf}
 rpm-ostree compose postprocess ${instroot}-postprocess
 assert_has_file ${instroot}-postprocess/${integrationconf}
-# Without treefile, kernels end up in "both" mode
-ls ${instroot}-postprocess/boot > ls.txt
-assert_file_has_content ls.txt '^vmlinuz-'
-rm -f ls.txt
 ostree --repo=${repobuild} commit -b test-directcommit --selinux-policy ${instroot}-postprocess --tree=dir=${instroot}-postprocess
 echo "ok postprocess + direct commit"