From 74abf8132e26f3ec1193c565a8c0e7e6c276f401 Mon Sep 17 00:00:00 2001
From: Alice Domage <alice.domage@gapfruit.com>
Date: Tue, 5 Dec 2023 16:25:48 +0100
Subject: [PATCH] tool/port: add .sparse-git install rule

Following Github support removal for svn [1], dde_rump port fails to
prepare. This commit introduces a new install rule for ports,
'.sparse-git'. It performs a sparse-checkout on the port repository, only
fetching required files.

[1] https://github.blog/2023-01-20-sunsetting-subversion-support/

Co-authored-by: Benjamin Lamowski <benjamin.lamowski@genode-labs.com>

Issue genodelabs#5072
Issue genodelabs/goa#28
---
 repos/dde_rump/ports/dde_rump.hash |  2 +-
 repos/dde_rump/ports/dde_rump.port | 11 +++++++----
 tool/ports/mk/check.mk             |  6 ++++++
 tool/ports/mk/install.mk           | 22 ++++++++++++++++++++++
 4 files changed, 36 insertions(+), 5 deletions(-)

diff --git a/repos/dde_rump/ports/dde_rump.hash b/repos/dde_rump/ports/dde_rump.hash
index fcabb717d9..ee15a3e2ae 100644
--- a/repos/dde_rump/ports/dde_rump.hash
+++ b/repos/dde_rump/ports/dde_rump.hash
@@ -1 +1 @@
-3138648e26b680c38a2ddfcc54bf8a939e3c6065
+19d6de3e1210c7f1c033d46d4178694d263cf0c1
diff --git a/repos/dde_rump/ports/dde_rump.port b/repos/dde_rump/ports/dde_rump.port
index 17b3ee9e13..17dd137828 100644
--- a/repos/dde_rump/ports/dde_rump.port
+++ b/repos/dde_rump/ports/dde_rump.port
@@ -1,21 +1,24 @@
 LICENSE   := BSD
 VERSION   := git
-DOWNLOADS := rump.git backport.svn libc_aarch64.svn libc_riscv.svn
+DOWNLOADS := rump.git backport.sparse-git libc_aarch64.sparse-git libc_riscv.sparse-git
 
 URL(rump) := https://github.com/ssumpf/rump.git
 DIR(rump) := src/lib/dde_rump
 REV(rump) := 28945d1af5f66c98a3884453adf84ede4ca1b702
 
-URL(backport) := https://github.com/justincormack/netbsd-src/trunk/src/sys/arch
+URL(backport) := https://github.com/justincormack/netbsd-src
 REV(backport) := HEAD
 DIR(backport) := src/lib/dde_rump_backport
+SPARSE_PATH(backport) := src/sys/arch
 
-URL(libc_aarch64) := https://github.com/justincormack/netbsd-src/trunk/src/common/lib/libc/arch/aarch64/atomic
+URL(libc_aarch64) := https://github.com/justincormack/netbsd-src
 REV(libc_aarch64) := HEAD
 DIR(libc_aarch64) := src/lib/libc/aarch64/atomic
+SPARSE_PATH(libc_aarch64) := src/common/lib/libc/arch/aarch64/atomic
 
-URL(libc_riscv) := https://github.com/justincormack/netbsd-src/trunk/src/common/lib/libc/arch/riscv/atomic
+URL(libc_riscv) := https://github.com/justincormack/netbsd-src
 REV(libc_riscv) := HEAD
 DIR(libc_riscv) := src/lib/libc/riscv/atomic
+SPARSE_PATH(libc_riscv) := src/common/lib/libc/arch/riscv/atomic
 
 PATCHES := patches/rump.patch patches/aarch64.patch patches/riscv.patch patches/sync.patch
diff --git a/tool/ports/mk/check.mk b/tool/ports/mk/check.mk
index 63afaeb289..159c839339 100644
--- a/tool/ports/mk/check.mk
+++ b/tool/ports/mk/check.mk
@@ -40,6 +40,12 @@ check: $(DOWNLOADS)
 %.git:
 	$(VERBOSE)git ls-remote --exit-code $(URL($*)) >/dev/null 2>&1
 
+#
+# Check source codes from a Git repository (sparse-checkout)
+#
+%.sparse-git:
+	$(VERBOSE)git ls-remote --exit-code $(URL($*)) >/dev/null 2>&1
+
 #
 # Check source codes from Subversion repository
 #
diff --git a/tool/ports/mk/install.mk b/tool/ports/mk/install.mk
index 77d9e24fe5..d02743b3f3 100644
--- a/tool/ports/mk/install.mk
+++ b/tool/ports/mk/install.mk
@@ -167,6 +167,28 @@ _git_dir = $(call _assert,$(DIR($1)),Missing declaration of DIR($*))
 		cd $$dir && $(GIT) fetch && $(GIT) reset -q --hard HEAD && $(GIT) checkout -q $(REV($*))
 
 
+##
+## Obtain source codes from a Git repository, subdirectory, using sparse-checkout
+##
+
+%.sparse-git:
+	$(VERBOSE)test -n "$(REV($*))" ||\
+		($(ECHO) "Error: Undefined revision for $*"; false);
+	$(VERBOSE)test -n "$(URL($*))" ||\
+		($(ECHO) "Error: Undefined URL for $*"; false);
+	$(VERBOSE)test -n "$(SPARSE_PATH($*))" ||\
+		($(ECHO) "Error: Undefined SPARSE_PATH for $*"; false);
+	$(VERBOSE)dir=$(call _git_dir,$*);\
+		sparse_sane=$$(echo $(SPARSE_PATH($*)) |  sed -e 's-^/--') ;\
+		test -d $$dir || ( $(MSG_DOWNLOAD)$(URL($*)); \
+			tmp=$$(mktemp -d); \
+			git clone --depth 1 --filter=blob:none --sparse $(URL($*)) $$tmp &> >(sed 's/^/$(MSG_GIT)/'); \
+			$(GIT) -C $$tmp sparse-checkout set $$sparse_sane && \
+			$(GIT) -C $$tmp checkout -q $(REV($*)); \
+			mkdir -p $$dir; \
+			mv $$tmp/$$sparse_sane/* $$dir; rm -rf $$tmp; )
+
+
 ##
 ## Obtain source codes from Subversion repository
 ##