From 84797ecf96f96c8659fbfc16f88577ab0b4125ca Mon Sep 17 00:00:00 2001
From: Daniel Silverstone <daniel.silverstone@codethink.co.uk>
Date: Fri, 28 Feb 2014 09:31:50 +0000
Subject: Add chroot sync tool

---
 br-ct-sync-chroots | 99 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100755 br-ct-sync-chroots

diff --git a/br-ct-sync-chroots b/br-ct-sync-chroots
new file mode 100755
index 0000000..b6b38fc
--- /dev/null
+++ b/br-ct-sync-chroots
@@ -0,0 +1,99 @@
+#!/bin/bash
+
+ACTION="$1"
+
+SCHROOT_BASE="${SCHROOT_BASE:-/etc/schroot}"
+SCHROOT_CONF="${SCHROOT_CONF:-${SCHROOT_BASE}/schroot.conf}"
+BASEROCK_BASE="${BASEROCK_BASE:-/opt/baserock/chroots}"
+
+clear_entries () {
+    sed -e'/BASEROCK_ENTRIES_BEGIN/,/BASEROCK_ENTRIES_END/d' -i "${SCHROOT_CONF}"
+}
+
+find_default () {
+    grep "^aliases" "$SCHROOT_CONF" | grep -q "default"
+}
+
+add_conf_line () {
+    echo "$@" >> "${SCHROOT_CONF}"
+}
+
+list_baserocks () {
+    (cd "${BASEROCK_BASE}" && ls -d */baserock) 2>/dev/null | sed -e's@/baserock$@@'
+}
+
+add_entries () {
+    add_conf_line "# BASEROCK_ENTRIES_BEGIN"
+    while read entry; do
+        add_conf_line "[baserock-$entry]"
+        add_conf_line "type=directory"
+        add_conf_line "directory=${BASEROCK_BASE}/${entry}"
+        add_conf_line "description=Baserock in $entry"
+        add_conf_line "users=root"
+        add_conf_line "script-config=baserock-$entry/config"
+        if ! find_default; then
+            test -e "${BASEROCK_BASE}/$entry/default" && add_conf_line "aliases=default"
+        fi
+    done < <(list_baserocks)
+    add_conf_line "# BASEROCK_ENTRIES_END"
+}
+
+find_configs () {
+    (cd "${SCHROOT_BASE}"; ls -d baserock-*/config) 2>/dev/null | sed -e's@/config$@@'
+}
+
+find_used_configs () {
+    grep "^script-config" "${SCHROOT_CONF}" | grep baserock | sed -e's@script-config *= *@@'
+}
+
+is_config_used () {
+    grep "script-config *= *" "${SCHROOT_CONF}" | grep -q -F "$1/config"
+}
+
+add_new_configs () {
+    for entry in $(list_baserocks); do
+        if ! test -e "${SCHROOT_BASE}/baserock-${entry}/config"; then
+            mkdir -p "${SCHROOT_BASE}/baserock-${entry}"
+            cat > "${SCHROOT_BASE}/baserock-${entry}/config" <<EOF
+FSTAB="${SCHROOT_BASE}/baserock-${entry}/fstab"
+COPYFILES="${SCHROOT_BASE}/baserock-${entry}/copyfiles"
+NSSDATABASE="${SCHROOT_BASE}/baserock-${entry}/fstab"
+EOF
+            cat > "${SCHROOT_BASE}/baserock-${entry}/fstab" <<'EOF'
+/proc           /proc           none    rw,bind        0       0
+/sys            /sys            none    rw,bind        0       0
+/dev            /dev            none    rw,bind         0       0
+/dev/pts        /dev/pts        none    rw,bind         0       0
+/tmp            /tmp            none    rw,bind         0       0
+EOF
+            cat > "${SCHROOT_BASE}/baserock-${entry}/copyfiles" <<'EOF'
+/etc/resolv.conf
+EOF
+            cat > "${SCHROOT_BASE}/baserock-${entry}/nssdatabase" <<'EOF'
+networks
+hosts
+EOF
+        fi
+    done
+}
+
+clear_unused_configs () {
+    while read config; do
+        if ! is_config_used "$config"; then
+            rm -rf "${SCHROOT_BASE}/${config}"
+        fi
+    done < <(find_configs)
+}
+
+case "$ACTION" in
+    purge)
+        clear_entries
+        clear_unused_configs
+        ;;
+    *)
+        clear_entries
+        add_entries
+        add_new_configs
+        clear_unused_configs
+        ;;
+esac
-- 
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