kernel-initramfs: Rework to use update-alternatives directly

- All valid initramfs types will be listed in INITRAMFS_FSTYPES so use
  that variable rather than open-coding a list of possibilities.
- Since we're using the list of things that must exist now we don't need
  to test if the files exist anymore.  And when signing, we can sign all
  of them now.
- Add some python to do_package to update all of the ALTERNATIVES
  variables dynamically based on how we're configured.  This introduces
  an alternative for the initramfs portion as well so there is a stable
  name.

Signed-off-by: Tom Rini <trini@konsulko.com>

2 files changed, 39 insertions, 63 deletions

diff --git a/meta-efi-secure-boot/recipes-kernel/linux/kernel-initramfs.bbappend b/meta-efi-secure-boot/recipes-kernel/linux/kernel-initramfs.bbappend
index 7a82aa7..bb61f70 100644
--- a/meta-efi-secure-boot/recipes-kernel/linux/kernel-initramfs.bbappend
+++ b/meta-efi-secure-boot/recipes-kernel/linux/kernel-initramfs.bbappend
@@ -4,56 +4,33 @@ inherit user-key-store deploy
 do_install[nostamp] = "1"
 
 fakeroot python do_sign() {
-    initramfs = None
-
     if d.getVar('BUNDLE', True) == '0':
-        initramfs = d.expand('${D}/boot/${INITRAMFS_IMAGE}${INITRAMFS_EXT_NAME}.cpio.gz')
+        for compr in d.getVar('INITRAMFS_FSTYPES').split():
+            uks_sel_sign(d.expand('${D}/boot/${INITRAMFS_IMAGE}${INITRAMFS_EXT_NAME}.') + compr, d)
     else:
-        initramfs = d.expand('${D}/boot/${KERNEL_IMAGETYPE}-initramfs${INITRAMFS_EXT_NAME}')
-
-    if initramfs == None or not os.path.exists(initramfs):
-        return
-
-    uks_sel_sign(initramfs, d)
+        uks_sel_sign(d.expand('${D}/boot/${KERNEL_IMAGETYPE}-initramfs${INITRAMFS_EXT_NAME}'), d)
 }
 addtask sign after do_install before do_deploy do_package
 do_sign[prefuncs] += "check_deploy_keys"
 
 do_deploy() {
-    initramfs=""
-    initramfs_dest=""
-
-    if [ "${BUNDLE}" = "0" ]; then
-        initramfs="${D}/boot/${INITRAMFS_IMAGE}${INITRAMFS_EXT_NAME}.cpio.gz"
-        initramfs_dest="${DEPLOYDIR}/${INITRAMFS_IMAGE}-${MACHINE}.cpio.gz"
-    else
-        initramfs="${D}/boot/${KERNEL_IMAGETYPE}-initramfs${INITRAMFS_EXT_NAME}"
-        initramfs_dest="${DEPLOYDIR}/${KERNEL_IMAGETYPE}-initramfs-${MACHINE}.bin"
-    fi
-
-    if [ -f "$initramfs.p7b" ]; then
-        install -d "${DEPLOYDIR}"
-
-        install -m 0644 "$initramfs.p7b" "$initramfs_dest.p7b"
-    fi
+    install -d "${DEPLOYDIR}"
+    for SIG in ${D}/boot/*.p7b; do
+        install -m 0644 ${SIG} ${DEPLOYDIR}
+    done
 }
 addtask deploy after do_install before do_build
 
-pkg_postinst_${PN}_append() {
-    if [ "${BUNDLE}" = "1" ] ; then
-        update-alternatives --install "/boot/${KERNEL_IMAGETYPE}.p7b" \
-            "${KERNEL_IMAGETYPE}.p7b" \
-            "/boot/${KERNEL_IMAGETYPE}-initramfs${INITRAMFS_EXT_NAME}.p7b" 50101
-    fi
-
-    true
-}
-
-pkg_prerm_${PN}_append() {
-    if [ "${BUNDLE}" = "1" ] ; then
-        update-alternatives --remove "${KERNEL_IMAGETYPE}.p7b" \
-            "${KERNEL_IMAGETYPE}-initramfs${INITRAMFS_EXT_NAME}.p7b"
-    fi
-
-    true
+python do_package_prepend () {
+    if d.getVar('BUNDLE') == '1':
+        d.appendVar(d.expand('ALTERNATIVE_${PN}'), ' ' + d.expand('${KERNEL_IMAGETYPE}' + '-initramfs.p7b'))
+        d.setVarFlag('ALTERNATIVE_LINK_NAME', d.expand('${KERNEL_IMAGETYPE}') + '-initramfs.p7b', d.expand('/boot/${KERNEL_IMAGETYPE}-initramfs.p7b'))
+        d.setVarFlag('ALTERNATIVE_TARGET', d.expand('${KERNEL_IMAGETYPE}') + '-initramfs.p7b', d.expand('/boot/${KERNEL_IMAGETYPE}-initramfs${INITRAMFS_EXT_NAME}.p7b'))
+        d.setVarFlag('ALTERNATIVE_PRIORITY', d.expand('${KERNEL_IMAGETYPE}') + '-initramfs.p7b', '50101')
+    else:
+        for compr in d.getVar('INITRAMFS_FSTYPES').split():
+            d.appendVar(d.expand('ALTERNATIVE_${PN}'), ' ' + d.expand('${INITRAMFS_IMAGE}') + '.p7b')
+            d.setVarFlag('ALTERNATIVE_LINK_NAME', d.expand('${INITRAMFS_IMAGE}') + '.p7b', d.expand('/boot/${INITRAMFS_IMAGE}.p7b'))
+            d.setVarFlag('ALTERNATIVE_TARGET', d.expand('${INITRAMFS_IMAGE}') + '.p7b', d.expand('/boot/${INITRAMFS_IMAGE}${INITRAMFS_EXT_NAME}.' + compr + '.p7b'))
+            d.setVarFlag('ALTERNATIVE_PRIORITY', d.expand('${INITRAMFS_IMAGE}') + '.p7b', '50101')
 }
diff --git a/meta/recipes-core/images/kernel-initramfs.bb b/meta/recipes-core/images/kernel-initramfs.bb
index 5b17403..fd23e74 100644
--- a/meta/recipes-core/images/kernel-initramfs.bb
+++ b/meta/recipes-core/images/kernel-initramfs.bb
@@ -35,39 +35,38 @@ do_populate_lic[depends] += "virtual/kernel:do_deploy"
 do_install() {
     [ -z "${INITRAMFS_IMAGE}" ] && exit 0
 
+    install -d "${D}/boot"
     if [ "${BUNDLE}" = "0" ]; then
-        for suffix in cpio.gz cpio.lzo cpio.lzma cpio.xz; do
+        for suffix in ${INITRAMFS_FSTYPES}; do
             img="${DEPLOY_DIR_IMAGE}/${INITRAMFS_IMAGE}-${MACHINE}.$suffix"
 
-            if [ -s "$img" ]; then
-                install -d "${D}/boot"
-                install -m 0644 "$img" \
-                    "${D}/boot/${INITRAMFS_IMAGE}${INITRAMFS_EXT_NAME}.$suffix"
-                break
-            fi
+            install -m 0644 "$img" \
+                "${D}/boot/${INITRAMFS_IMAGE}${INITRAMFS_EXT_NAME}.$suffix"
         done
     else
         if [ -e "${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-initramfs-${MACHINE}.bin" ]; then
-            install -d "${D}/boot"
             install -m 0644 "${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-initramfs-${MACHINE}.bin" \
                 "${D}/boot/${KERNEL_IMAGETYPE}-initramfs${INITRAMFS_EXT_NAME}"
         fi
     fi
 }
 
-pkg_postinst_${PN}() {
-    if [ "${BUNDLE}" = "1" ]; then
-        update-alternatives --install "/boot/${KERNEL_IMAGETYPE}" \
-            "${KERNEL_IMAGETYPE}" "/boot/${KERNEL_IMAGETYPE}-initramfs${INITRAMFS_EXT_NAME}" \
-            50101 || true
-    fi
-}
-
-pkg_prerm_${PN}() {
-    if [ "${BUNDLE}" = "1" ]; then
-        update-alternatives --remove "${KERNEL_IMAGETYPE}" \
-            "${KERNEL_IMAGETYPE}-initramfs${INITRAMFS_EXT_NAME}" || true
-    fi
+inherit update-alternatives
+
+ALTERNATIVES_${PN} = ""
+
+python do_package_prepend () {
+    if d.getVar('BUNDLE') == '1':
+        d.appendVar(d.expand('ALTERNATIVE_${PN}'), ' ' + d.expand('${KERNEL_IMAGETYPE}' + '-initramfs'))
+        d.setVarFlag('ALTERNATIVE_LINK_NAME', d.expand('${KERNEL_IMAGETYPE}') + '-initramfs', d.expand('/boot/${KERNEL_IMAGETYPE}-initramfs'))
+        d.setVarFlag('ALTERNATIVE_TARGET', d.expand('${KERNEL_IMAGETYPE}') + '-initramfs', d.expand('/boot/${KERNEL_IMAGETYPE}-initramfs${INITRAMFS_EXT_NAME}'))
+        d.setVarFlag('ALTERNATIVE_PRIORITY', d.expand('${KERNEL_IMAGETYPE}') + '-initramfs', '50101')
+    else:
+        for compr in d.getVar('INITRAMFS_FSTYPES').split():
+            d.appendVar(d.expand('ALTERNATIVE_${PN}'), ' ' + d.expand('${INITRAMFS_IMAGE}'))
+            d.setVarFlag('ALTERNATIVE_LINK_NAME', d.expand('${INITRAMFS_IMAGE}'), d.expand('/boot/${INITRAMFS_IMAGE}'))
+            d.setVarFlag('ALTERNATIVE_TARGET', d.expand('${INITRAMFS_IMAGE}'), d.expand('/boot/${INITRAMFS_IMAGE}${INITRAMFS_EXT_NAME}.' + compr))
+            d.setVarFlag('ALTERNATIVE_PRIORITY', d.expand('${INITRAMFS_IMAGE}'), '50101')
 }
 
 PACKAGE_ARCH = "${MACHINE_ARCH}"