kernel/linux: simplify custom tarball handling

Simplify the way the custom tarball is handled:
- fake version="custom"
- at download, simply link the custom tarball to:
    "linux-custom.${custom_extension}"
- at extract, the above allows to simply extract "linux-${LINUX_VERSION}"
  where LINUX_VERISON is set to the fake version="custom"

Not that much convoluted, in fact... :-/

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

1 files changed, 27 insertions, 43 deletions

diff --git a/scripts/build/kernel/linux.sh b/scripts/build/kernel/linux.sh
index d750cccd..3a2c95fe 100644
--- a/scripts/build/kernel/linux.sh
+++ b/scripts/build/kernel/linux.sh
@@ -18,9 +18,25 @@ CT_DoKernelTupleValues() {
 # Download the kernel
 do_kernel_get() {
     local k_ver
-    if [    "${CT_KERNEL_LINUX_INSTALL}" = "y"  \
-         -a "${CT_KERNEL_LINUX_CUSTOM}" != "y"  \
-       ]; then
+    local custom_name
+
+    if [ "${CT_KERNEL_LINUX_USE_CUSTOM_HEADERS}" = "y"  ]; then
+        return 0
+    fi
+
+    if [ "${CT_KERNEL_LINUX_CUSTOM}" = "y" ]; then
+        # Wee need to know the custom tarball extension,
+        # so we can cerate a properly-named symlink, which
+        # we use later on in 'extract'
+        case "${CT_KERNEL_LINUX_CUSTOM_TARBALL}" in
+            *.tar.bz2)      custom_name="linux-custom.tar.bz2";;
+            *.tar.gz|*.tgz) custom_name="linux-custom.tar.gz";;
+            *.tar)          custom_name="linux-custom.tar";;
+            *)  CT_Abort "Unknown extension for custom linux tarball '${CT_KERNEL_LINUX_CUSTOM_TARBALL}'";;
+        esac
+        CT_DoExecLog DEBUG ln -sf "${CT_KERNEL_LINUX_CUSTOM_TARBALL}"  \
+                                  "${CT_SRC_DIR}/${custom_name}"
+    else # Not a custom tarball
         case "${CT_KERNEL_VERSION}" in
             2.6.*.*|3.*.*)
                 # 4-part versions (for 2.6 stables and long-terms), and
@@ -44,54 +60,22 @@ do_kernel_get() {
 
 # Extract kernel
 do_kernel_extract() {
-    local tar_opt
-    if [ "${CT_KERNEL_LINUX_INSTALL}" = "y" ]; then
-        if [ "${CT_KERNEL_LINUX_CUSTOM}" = "y" ]; then
-            # We extract the custom linux tree into a directory with a
-            # well-known name, and strip the leading directory component
-            # of the extracted pathes. This is needed because we do not
-            # know the value for this first component, because it is a
-            # _custom_ tree.
-            # Also, we have to protect from partial extraction using the
-            # .extracting and .extracted locks (not using .patching and
-            # .patched as we are *not* patching that kernel).
-
-            if [ -e "${CT_SRC_DIR}/.linux-custom.extracted" ]; then
-                CT_DoLog DEBUG "Custom linux kernel tree already extracted"
-                return 0
-            fi
-
-            CT_TestAndAbort "Custom kernel tree partially extracted. Remove before resuming" -f "${CT_SRC_DIR}/.linux-custom.extracting"
-            CT_DoExecLog DEBUG touch "${CT_SRC_DIR}/.linux-custom.extracting"
-            CT_DoExecLog DEBUG mkdir "${CT_SRC_DIR}/linux-custom"
-
-            case "${CT_KERNEL_LINUX_CUSTOM_TARBALL}" in
-                *.tar.bz2)      tar_opt=-j;;
-                *.tar.gz|*.tgz) tar_opt=-z;;
-                *.tar)          ;;
-                *)              CT_Abort "Don't know how to handle '${CT_KERNEL_LINUX_CUSTOM_TARBALL}': unknown extension";;
-            esac
-            CT_DoLog EXTRA "Extracting custom linux kernel"
-            CT_DoExecLog ALL tar x -C "${CT_SRC_DIR}/linux-custom"      \
-                                 --strip-components 1 -v ${tar_opt}     \
-                                 -f "${CT_KERNEL_LINUX_CUSTOM_TARBALL}"
-
-            CT_DoExecLog ALL mv -v "${CT_SRC_DIR}/.linux-custom.extracting" "${CT_SRC_DIR}/.linux-custom.extracted"
-        else
-            CT_Extract "linux-${CT_KERNEL_VERSION}"
-            CT_Patch "linux" "${CT_KERNEL_VERSION}"
-        fi
+    if [ "${CT_KERNEL_LINUX_USE_CUSTOM_HEADERS}" = "y"  ]; then
+        return 0
     fi
+    # This also handles the custom tarball
+    CT_Extract "linux-${CT_KERNEL_VERSION}"
+    CT_Patch "linux" "${CT_KERNEL_VERSION}"
 }
 
 # Wrapper to the actual headers install method
 do_kernel_headers() {
     CT_DoStep INFO "Installing kernel headers"
 
-    if [ "${CT_KERNEL_LINUX_INSTALL}" = "y" ]; then
-        do_kernel_install
-    else
+    if [ "${CT_KERNEL_LINUX_USE_CUSTOM_HEADERS}" = "y" ]; then
         do_kernel_custom
+    else
+        do_kernel_install
     fi
 
     CT_EndStep