3 files changed, 28 insertions, 3 deletions
diff --git a/bin/interpret-mail b/bin/interpret-mail
index f2b7d26..0401498 100755
--- a/bin/interpret-mail
+++ b/bin/interpret-mail
@@ -29,6 +29,9 @@ if [ $# -ne 0 ]; then
   >&2 echo '  - "unblock: <state-file>":'
   >&2 echo '    Unblock the given packge.'
   >&2 echo ''
+  >&2 echo '  - "schedule: <pkgname>":'
+  >&2 echo '    Put the given package on the build list (again).'
+  >&2 echo ''
   >&2 echo '  - ALL: all of the above (only valid in'
   >&2 echo '    "conf/admin-gpg-keys")'
   >&2 echo ''
@@ -215,3 +218,19 @@ if [ -s "${tmp_dir}/unblock" ]; then
     log 'There was an error while unblocking the packages - ignoring this message.\n'
   fi
 fi
+
+if [ -s "${tmp_dir}/schedule" ]; then
+  # shellcheck disable=SC2046
+  "${base_dir}/bin/seed-build-list" $(
+    tr '[:space:]' '\n' < \
+      "${tmp_dir}/schedule" | \
+      grep -vxF '' | \
+      while read -r package; do
+        printf -- '-p ^%s$\n' "$(str_to_regex "${package}")"
+      done
+  ) | \
+    sponge "${tmp_dir}/schedule"
+  if [ -s "${tmp_dir}/schedule" ]; then
+    log 'Successfully (re)scheduled %s packages.\n' "$(wc -l < "${tmp_dir}/schedule")"
+  fi
+fi
diff --git a/bin/seed-build-list b/bin/seed-build-list
index 5392306..cfe4bab 100755
--- a/bin/seed-build-list
+++ b/bin/seed-build-list
@@ -89,6 +89,12 @@ if [ $# -ne 0 ]; then
   usage 1
 fi
 
+if [ ! -s "${tmp_dir}/mirrors" ] && \
+  [ ! -s "${tmp_dir}/package-regexes" ]; then
+  # nothing to do
+  exit 0
+fi
+
 repos="${stable_package_repositories}"
 
 find "${work_dir}/package-infos" -maxdepth 1 -name '*.packages' -printf '%f\n' | \
@@ -273,8 +279,8 @@ fi
 
 if ${update}; then
   awk '{print $4 " " $1 " " $2 " " $3}' \
-    "${tmp_dir}/build-list.new" >> \
-    "${work_dir}/build-list"
+    "${tmp_dir}/build-list.new" | \
+    tee -a "${work_dir}/build-list"
 
   # Remove the lock file
 
diff --git a/conf/default.conf b/conf/default.conf
index 68efd5f..de14704 100755
--- a/conf/default.conf
+++ b/conf/default.conf
@@ -33,7 +33,7 @@ repo_key='0xdeadbeef'
 package_key='0x15eebadc0de'
 
 # what can be done via the email interface
-possible_email_actions='stabilize block unblock'
+possible_email_actions='stabilize block unblock schedule'
 
 # how many lines of email logs should be kept maximally
 max_mail_log_lines=10