From 77fc965cf5c96e3bd2f1149686be590925a148b0 Mon Sep 17 00:00:00 2001
From: Jonathan Bauer
Date: Fri, 30 Aug 2019 17:49:04 +0200
Subject: build-initramfs.sh: fix broken shallow submodule

cloning ... the git submodule foreach never worked (?) or at least it
got broken somehow. Change to "manually" shallow-cloning the modules,
quite ugly but speeds things up quite a bit
---
 builder/build-initramfs.sh | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/builder/build-initramfs.sh b/builder/build-initramfs.sh
index 50ce7c1e..28f6b8af 100755
--- a/builder/build-initramfs.sh
+++ b/builder/build-initramfs.sh
@@ -38,12 +38,22 @@ if ! [[ -d "$_needed_location" ]]; then
        "$_git_source" "$_temporary_repository_location"
     pushd "$_temporary_repository_location"
     git submodule init
-    # shellcheck disable=SC2016
-    git submodule foreach '
-        branch="$(git config --file "$toplevel/.gitmodules" "submodule.$name.branch")"
-        git clone --depth 1 --branch "$branch"
-    '
-    git submodule update # --remote <- this seems like a bad idea
+    # try to clone submodules as shallowy as possible, since we cannot just
+    # use '--depth 1' on submodules residing on non-master branches...
+    for mod in $(awk '$1 == "[submodule" {gsub(/"|]/,"",$2); print $2}' .gitmodules); do
+        url="$(git config -f .gitmodules --get submodule.${mod}.url)"
+        path="$(git config -f .gitmodules --get submodule.${mod}.path)"
+        branch="$(git config -f .gitmodules --get submodule.${mod}.branch)"
+        commit="$(git submodule status $path | grep -oE '[0-9a-f]{40}')"
+        [ "$mod" = "dnbd3" ]       && depth_arg=("--shallow-since" "2019-02-12")
+        [ "$mod" = "rebash" ]      && depth_arg=("--shallow-since" "2016-11-30")
+        [ "$mod" = "qemu-xmount" ] && depth_arg=("--shallow-since" "2016-01-01")
+        [ "$mod" = "xmount" ]      && depth_arg=("--depth" "1")
+        git clone -n --no-tags "${depth_arg[@]}" --branch "$branch" "$url" "$path"
+        pushd "$path"
+        git checkout "$commit"
+        popd
+    done
     # apply patches for submodules
     git submodule foreach '
         for p in $(find ${toplevel}/builder/patches/${path##*/} -type f -name "*.patch" | sort -n); do
-- 
cgit v1.2.3-55-g7522