From f6cbc501c1602433c466f2e23acf8828f27dbd92 Mon Sep 17 00:00:00 2001
From: Leah Rowe <leah@libreboot.org>
Date: Thu, 30 May 2024 07:29:50 +0100
Subject: import nuke() from cbmk cdce8ba70b

cbmk revision:
cdce8ba70b863ea3fe0ad7a4d7b27d0c5ca30421
as of date 30 May 2024

Canoeboot provides deblobbing, fully, on all sources, so
as to provide a GNU FSDG compliant coreboot distro.

Libreboot used to do this but now uses a more pragmatic
Binary Blob Reduction Policy, allowing better hardware
support in general. See:

https://libreboot.org/news/policy.html

Well! We sometimes still need to delete files in Libreboot,
but for other reasons. For example, the poorly licensed
strlcat.c file that we delete from U-Boot, in both projects.

I currently hardcode such deletions in lbmk. After this
revision, I will start using "nuke.list" files as in cbmk.

Simply patching the sources to exclude such files, in this
context, is not OK because then we are still including them
but as diffs. This is why the nuke() function exists.

Import Canoeboot's nuke technology.

Signed-off-by: Leah Rowe <leah@libreboot.org>
---
 include/git.sh | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

(limited to 'include')

diff --git a/include/git.sh b/include/git.sh
index f5aa34eb..3052d5b4 100755
--- a/include/git.sh
+++ b/include/git.sh
@@ -46,6 +46,7 @@ prepare_new_tree()
 	cp -R "src/$project/$project" "$tmpgit" || \
 	    $err "prepare_new_tree $project/$tree: can't make tmpclone"
 	git_prep "$PWD/$cfgsdir/$tree/patches" "src/$project/$tree" "update"
+	nuke "$project/$tree" "$project/$tree"
 }
 
 fetch_project_repo()
@@ -61,6 +62,10 @@ fetch_project_repo()
 		x_ ./update trees -f $d
 	done
 	rm -Rf "$tmpgit" || $err "fetch_repo: !rm -Rf $tmpgit"
+
+	for x in config/git/*; do
+		[ -f "$x" ] && nuke "${x##*/}" "src/${x##*/}"; continue
+	done
 }
 
 clone_project()
@@ -181,3 +186,32 @@ move_repo()
 	[ -n "$xtree" ] && [ ! -d "src/coreboot/$xtree" ] && \
 		x_ ./update trees -f coreboot "$xtree"; return 0
 }
+
+# can delete from multi- and single-tree projects.
+# called from script/trees when downloading sources.
+nuke()
+{
+	del="n"
+	pjcfgdir="${1%/}"
+	pjsrcdir="${2%/}"
+	pjsrcdir="${pjsrcdir#src/}"
+	[ ! -f "config/$pjcfgdir/nuke.list" ] && return 0
+
+	while read -r nukefile; do
+		rmf="$(realpath "src/$pjsrcdir/$nukefile" 2>/dev/null)" || \
+		    continue
+		[ -L "$rmf" ] && continue # we will delete the actual file
+		[ "${rmf#"$PWD/src/$pjsrcdir"}" = "$rmf" ] && continue
+		[ "${rmf#"$PWD/src/"}" = "$pjsrcdir" ] && continue
+		rmf="${rmf#"$PWD/"}"
+		[ -e "$rmf" ] || continue
+		del="y"
+		rm -Rf "$rmf" || $err "$nuke pjcfgdir: can't rm \"$nukefile\""
+		printf "nuke %s: deleted \"%s\"\n" "$pjcfgdir" "$rmf"
+	done < "config/$pjcfgdir/nuke.list"
+
+	[ "${del}" = "y" ] && return 0
+	printf "nuke %s: no defined files exist in dir, src/%s\n" 1>&2 \
+	    "$pjcfgdir" "$pjsrcdir"
+	printf "(this is not an error)\n" 1>&2
+}
-- 
cgit v1.2.1