From 46416f9fc4f22deab8c962cc6819cf536c7b84d4 Mon Sep 17 00:00:00 2001
From: Helmut Buchsbaum <helmut.buchsbaum@opensource.tttech-industrial.com>
Date: Wed, 4 May 2022 19:58:37 +0200
Subject: [PATCH] debian: acrn-hypervisor: Refactor debconf

Tracked-On: #6688
Signed-off-by: Helmut Buchsbaum <helmut.buchsbaum@opensource.tttech-industrial.com>
---
 debian/acrn-hypervisor.config      | 13 ---------
 debian/acrn-hypervisor.config.in   | 44 ++++++++++++++++++++++++++++++
 debian/acrn-hypervisor.postinst.in | 10 -------
 debian/acrn-hypervisor.postrm.in   |  7 +++--
 debian/control                     |  3 +-
 debian/rules                       |  9 +++++-
 6 files changed, 59 insertions(+), 27 deletions(-)
 delete mode 100644 debian/acrn-hypervisor.config
 create mode 100644 debian/acrn-hypervisor.config.in

diff --git a/debian/acrn-hypervisor.config b/debian/acrn-hypervisor.config
deleted file mode 100644
index 4651ab96a..000000000
--- a/debian/acrn-hypervisor.config
+++ /dev/null
@@ -1,13 +0,0 @@
-#!/bin/sh
-
-# Exit on error
-set -e
-
-# Source debconf library.
-. /usr/share/debconf/confmodule
-
-# query board
-db_input critical acrn-hypervisor/board || true
-
-# Show interface
-db_go || true
diff --git a/debian/acrn-hypervisor.config.in b/debian/acrn-hypervisor.config.in
new file mode 100644
index 000000000..d2959050f
--- /dev/null
+++ b/debian/acrn-hypervisor.config.in
@@ -0,0 +1,44 @@
+#!/bin/bash
+# inspired by http://www.fifi.org/doc/debconf-doc/tutorial.html
+
+# Exit on error
+set -e
+
+# Source debconf library.
+. /usr/share/debconf/confmodule
+db_version 2.0
+
+# This conf script is capable of backing up
+db_capb backup
+
+ACRNDIR=@acrndir@
+declare -A SCENARIOS=@scenarios@
+STATE="board"
+while [ "$STATE" != "quit" -a "$STATE" != "done" ]; do
+    case "$STATE" in
+        board)
+            # query board
+            db_input critical acrn-hypervisor/board || true
+            if db_go; then
+                STATE="scenario"
+            else
+                STATE="quit"
+            fi
+            ;;
+        scenario)
+            db_get acrn-hypervisor/board
+            db_subst acrn-hypervisor/scenario scenariolist ${SCENARIOS[${RET}]}
+            db_clear
+            db_input critical acrn-hypervisor/scenario || true
+            if db_go; then
+                STATE="done"
+            else
+                STATE="board"
+            fi
+        ;;
+    esac
+done
+
+# trigger grub update
+dpkg-trigger --await --by-package=acrn-hypervisor grub-acrn-update
+
diff --git a/debian/acrn-hypervisor.postinst.in b/debian/acrn-hypervisor.postinst.in
index 6ef528e19..d916c3af2 100644
--- a/debian/acrn-hypervisor.postinst.in
+++ b/debian/acrn-hypervisor.postinst.in
@@ -11,16 +11,6 @@ ACRNDIR=@acrndir@
 
 db_get acrn-hypervisor/board
 BOARD=${RET}
-
-SCENARIOS=$(find ${ACRNDIR}/${BOARD} -maxdepth 1 -type d \
-       | tail -n +2 | sed "s#${ACRNDIR}/${BOARD}/##" \
-       | sort | awk '{s=s (s?OFS:x) $1} END {print s}' OFS=", ")
-
-db_subst acrn-hypervisor/scenario scenariolist ${SCENARIOS}
-db_clear
-db_input critical acrn-hypervisor/scenario || true
-db_go || true
-
 db_get acrn-hypervisor/scenario
 SCENARIO=${RET}
 
diff --git a/debian/acrn-hypervisor.postrm.in b/debian/acrn-hypervisor.postrm.in
index fa8ce7e6a..a34e2bf41 100644
--- a/debian/acrn-hypervisor.postrm.in
+++ b/debian/acrn-hypervisor.postrm.in
@@ -30,9 +30,12 @@ rm_acrn()
 
 
 case "$1" in
-    remove|purge)
+    remove)
         rm_acrn
-	db_purge acrn-hypervisor || :
+    ;;
+    purge)
+        rm_acrn
+        db_purge acrn-hypervisor || :
     ;;
     upgrade)
         rm_acrn
diff --git a/debian/control b/debian/control
index 1add890fb..392567394 100644
--- a/debian/control
+++ b/debian/control
@@ -59,7 +59,8 @@ Depends:
    ${misc:Depends},
    grub-acrn,
    acrn-devicemodel,
-   debconf (>=1.5.71)
+   debconf (>=1.5.71),
+   bash (>=4)
 Suggests: acrn-doc
 Recommends: setserial
 Description: ACRN Hypervisor for IoT
diff --git a/debian/rules b/debian/rules
index daeb7da2d..9e1943700 100755
--- a/debian/rules
+++ b/debian/rules
@@ -165,7 +165,14 @@ debian/acrn-hypervisor.templates: debian/acrn-hypervisor.templates.in
 	@$(call echo-silent,CREATE $@)
 	$(Q)sed -e 's/@boardlist@/$(call commasep,$(boardlist))/g' $< > $@
 
-override_dh_installdebconf-arch: debian/acrn-hypervisor.templates
+debian/acrn-hypervisor.config: debian/acrn-hypervisor.config.in
+	@$(call echo-verbose)
+	@$(call echo-silent,CREATE $@)
+	@# create scenarios as bash associative array
+	$(Q)sed -e 's%@acrndir@%$(libdir)/acrn%g' \
+	        -e 's%@scenarios@%($(foreach b,$(boardlist),[$b]="$(call commasep,$(scenariolist_$b))"))%g' $< > $@
+
+override_dh_installdebconf-arch: debian/acrn-hypervisor.templates debian/acrn-hypervisor.config
 	$(Q)dh_installdebconf -a
 
 ### build-arch ###############################################################