fix: [vps] make ``nextcloud upgrade`` change ``compose.yml`` in more scenarii

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

bin/vps

@@ -87,45 +87,56 @@ compose:get-compose-yml() {
 decorator._mangle_fn compose:get-compose-yml
 export -f compose:get-compose-yml
 
+
 compose:has-container-project-myc() {
     local projects
     projects=$(docker:running-container-projects) || return 1
     [[ $'\n'"$projects"$'\n' == *$'\n'"myc"$'\n'* ]]
 }
 
+
 compose:file:value-change() {
-    local key="$1" value="$2" first=1 count=0 diff=""
+    local key="$1" value="$2"
+    yaml:file:value-change "$(compose:get-compose-yml)" "$key" "$value" || exit 1
+}
+export -f compose:file:value-change
+
+
+yaml:file:value-change() {
+    local file="$1" key="$2" value="$3" first=1 count=0 diff=""
     (
-        COMPOSE_YML_FILE=$(compose:get-compose-yml) || exit 1
-        export COMPOSE_YML_FILE
-    cd "${COMPOSE_YML_FILE%/*}"
+    cd "${file%/*}"
     while read-0 hunk; do
         if [ -n "$first" ]; then
             diff+="$hunk"
             first=
             continue
         fi
-        [[ "$hunk" =~ $'\n'"+"[[:space:]]+"${key##*.}:" ]] && {
+        if [[ "$hunk" =~ $'\n'"+"[[:space:]]+"${key##*.}:" ]]; then
             ((count++))
             diff+="$hunk" >&2
-        }
+        else
+            :
+            # echo "discarding:" >&2
+            # e "$hunk" | prefix "  | " >&2
+        fi
     done < <(
         export DEBUG=
         settmpdir YQ_TEMP
-        cp "${COMPOSE_YML_FILE}" "$YQ_TEMP/compose.yml" &&
+        cp "${file}" "$YQ_TEMP/compose.yml" &&
             yq -i ".${key} = \"${value}\"" "$YQ_TEMP/compose.yml" &&
-            diff -u1 "${COMPOSE_YML_FILE}" "$YQ_TEMP/compose.yml" |
-                sed -r "s/^(@@.*)$/\x00\1/g;s%^(\+\+\+) [^\t]+%\1 ${COMPOSE_YML_FILE}%g"
+            sed -ri 's/^([^# ])/\n\0/g' "$YQ_TEMP/compose.yml" &&
+            diff -u0 -Z "${file}" "$YQ_TEMP/compose.yml" |
+                sed -r "s/^(@@.*)$/\x00\1/g;s%^(\+\+\+) [^\t]+%\1 ${file}%g"
+            printf "\0"
     )
     if [[ "$count" == 0 ]]; then
-        err "No change made to 'compose.yml'."
+        err "No change made to '$file'."
         return 1
     fi
     if [[ "$count" != 1 ]]; then
-        err "compose file change request seems dubious and was refused."
-        if [ -n "$DEBUG" ]; then
-            e "$diff" | prefix "  | "
-        fi
+        err "compose file change request seems dubious and was refused:"
+        e "$diff" | prefix "  | " >&2
         return 1
     fi
     echo Applying: >&2
@@ -133,7 +144,7 @@ compose:file:value-change() {
     patch <<<"$diff"
     ) || exit 1
 }
-export -f compose:file:value-change
+export -f yaml:file:value-change
 
 
 type:is-mailcow() {