selfstrap: include sid in written sources.list if sid is included on run system sources.list

1 files changed, 14 insertions, 7 deletions

diff --git a/selfstrap b/selfstrap
index e3a0d5c..60ac969 100755
--- a/selfstrap
+++ b/selfstrap
@@ -210,16 +210,23 @@ write_sources_list()
     [ ! "$REWRITE_SOURCES_LIST" -a -e "$dest" ] && return
     printf 'APT::Default-Release "%s";\n' "$target_release" > "$TARGET"/etc/apt/apt.conf.d/default-release
     (
-        printf '%s\n' \
-               "deb  ${debian_mirror}           ${target_release}            main  contrib  non-free"  \
-               "deb  ${debian_mirror}           ${target_release}-backports  main  contrib  non-free"  \
-               "deb  ${debian_security_mirror}  ${target_release}/updates    main  contrib  non-free"
+        if [ "$target_release" ]
+        then
+            printf '%s\n' \
+                   "deb  ${debian_mirror}           ${target_release}            main  contrib  non-free"  \
+                   "deb  ${debian_mirror}           ${target_release}-backports  main  contrib  non-free"  \
+                   "deb  ${debian_security_mirror}  ${target_release}/updates    main  contrib  non-free"
+        fi
+        if apt policy | grep -q ' sid/'
+        then
+            printf '%s\n' \
+                    "deb  ${debian_mirror}           sid                         main  contrib  non-free"
         if [ "$target_release" = stretch ]
         then
             printf '%s\n' \
-                   "deb  ${debian_mirror}           buster            main  contrib  non-free"  \
-                   "deb  ${debian_mirror}           buster-backports  main  contrib  non-free"  \
-                   "deb  ${debian_security_mirror}  buster/updates    main  contrib  non-free"
+                   "deb  ${debian_mirror}           buster                       main  contrib  non-free"  \
+                   "deb  ${debian_mirror}           buster-backports             main  contrib  non-free"  \
+                   "deb  ${debian_security_mirror}  buster/updates               main  contrib  non-free"
 
         fi
     ) | column -t > "$dest"