From aa62e20b31779c8ffa844a854234a668511a6f21 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 10 Oct 2020 16:40:12 +0100
Subject: [PATCH] New --edit[s]-sources mode, still undocumented

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 nailing-cargo | 29 ++++++++++++++++++++++++++---
 1 file changed, 26 insertions(+), 3 deletions(-)

diff --git a/nailing-cargo b/nailing-cargo
index 69ad16e..ff65853 100755
--- a/nailing-cargo
+++ b/nailing-cargo
@@ -656,6 +656,19 @@ END_FILES_FULL
 		symlink "$src/$_", "$_" or die "$_ $!";
 	' "$src";
 END_DEEP
+    } elsif ($linkfarm_depth eq 'copy-edit') {
+      $pre .= <<'END_COPY_EDIT';
+	find -lname "$src/*" -print0 | xargs -0r rm --;
+        (set -e; cd "$src"; git ls-files -c -z |
+        cpio --quiet -p0m --no-preserve-owner -u --make-directories "$bld/$sd");
+	clean () {
+          (set -e; cd "$src"; git ls-files -c -z) | xargs -0r rm -f --;
+        };
+END_COPY_EDIT
+      $post .= <<'END_COPY_EDIT_BUNDLE';
+        (set -e; cd "$src"; git ls-files -c -z) |
+        cpio -Hustar -o0 --quiet >"nailing-cargo-update.tar";
+END_COPY_EDIT_BUNDLE
     } else {
        die "$linkfarm_depth ?";
     }
@@ -863,8 +876,16 @@ sub invoke () {
   }
 }
 
-sub cargo_lock_update_after () {
-  if ($do_cargo_lock && $cargo_lock_update && !$just_linkfarm) {
+sub files_return_after_update () {
+  if ($linkfarm_depth eq 'copy-edit') {
+    system qw(sh -ec), <<'END', 'x', "$build_absdir";
+      git ls-files -c -z | \
+      tar -x --keep-newer-files --no-same-permissions --no-same-owner \
+        --no-acls --no-selinux --no-xattrs --warning=no-ignore-newer \
+        -Hustar --null --files-from=- --force-local \
+        -f "$1/nailing-cargo-update.tar"
+END
+  } elsif ($do_cargo_lock && $cargo_lock_update && !$just_linkfarm) {
     # avoids importing File::Copy and the error handling is about as good
     $!=0; $?=0;
     my $r= system qw(cp --), "$build_absdir/Cargo.lock", "Cargo.lock";
@@ -992,6 +1013,8 @@ sub parse_args () {
       $cargo_lock_update= 1; # will set $linkfarm_detph to 1 by default
     } elsif (m{^--linkfarm(?:=(no|shallow|git|full))?$}) {
       $linkfarm_depth = $1 || 'git';
+    } elsif (m{^--edits?-sources?$}) {
+      $linkfarm_depth = 'copy-edit';
     } elsif (m{^--just-run$}) {
       $do_nail = $do_cargo_lock = $do_lock = 0;
     } elsif (m{^--(clean|keep)-linkfarm$}) {
@@ -1095,7 +1118,7 @@ printf STDERR "$self: nailed (%s manifests, %s packages)%s\n",
 print STDERR "$self: invoking: @display_cmd\n" if $verbose;
 my $estatus = invoke();
 
-cargo_lock_update_after();
+files_return_after_update();
 
 uninstall() unless $leave_nailed;
 $want_uninstall = 0;
-- 
2.30.2