fix: support BSD also for standard macosx compatibility

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

bin/compose

@@ -16,6 +16,30 @@
 ##
 
 
+_sed_compat_load() {
+    if get_path sed >/dev/null; then
+        if sed --version >/dev/null 2>&1; then  ## GNU
+            sed_compat() { sed -r "$@"; }
+            sed_compat_i() { sed -r -i "$@"; }
+        else                                    ## BSD
+            sed_compat() { sed -E "$@"; }
+            sed_compat_i() { sed -E -i "" "$@"; }
+        fi
+    else
+        ## Look for ``gsed``
+        if (get_path gsed && gsed --version) >/dev/null 2>&1; then
+            sed_compat() { gsed -r "$@"; }
+            sed_compat_i() { gsed -r -i "$@"; }
+        else
+            die "$exname: required GNU or BSD sed not found"
+        fi
+    fi
+}
+
+## BSD / GNU sed compatibility layer
+sed_compat() { _sed_compat_load; sed_compat "$@"; }
+
+
 hash_get() {
     if get_path sha256sum >/dev/null; then
         hash_get() { local x; x=$(sha256sum) || return 1; echo "${x:0:32}"; }
@@ -483,14 +507,14 @@ get_compose_opts_list() {
         grep -E -m 1 "^\S*\$" -B 10000 |
         head -n -1 |
         grep -E "^\s+-" |
-        sed -r 's/\s+((((-[a-zA-Z]|--[a-zA-Z0-9-]+)( [A-Z=]+|=[^ ]+)?)(, )?)+)\s+.*$/\1/g' |
+        sed_compat 's/\s+((((-[a-zA-Z]|--[a-zA-Z0-9-]+)( [A-Z=]+|=[^ ]+)?)(, )?)+)\s+.*$/\1/g' |
         tee "$cache_file" || return 1
 }
 
 
 multi_opts_filter() {
      grep -E "$_MULTIOPTION_REGEX_LINE_FILTER" |
-        sed -r "s/^($_MULTIOPTION_REGEX)(\s|=).*$/\1/g" |
+        sed_compat "s/^($_MULTIOPTION_REGEX)(\s|=).*$/\1/g" |
         tr ',' "\n" | nspc
 }
 
@@ -975,7 +999,7 @@ run() {
     if [ -n "$DEBUG" ] || [ -n "$DRY_RUN" ]; then
         debug "${WHITE}Launching:${NORMAL}"
         echo "docker run --rm \\"
-        pretty_print "${docker_run_opts[@]}" | sed -r 's/^/    /g;s/([^\])$/\1\\\n/g'
+        pretty_print "${docker_run_opts[@]}" | sed_compat 's/^/    /g;s/([^\])$/\1\\\n/g'
         if [ -z "$ENTER" ]; then
             echo "    ${COMPOSE_DOCKER_IMAGE} \\"
             echo "       " "$@"
@@ -983,7 +1007,7 @@ run() {
             echo "    --entrypoint bash \\"
             echo "    ${COMPOSE_DOCKER_IMAGE}"
         fi
-    fi | { if [ -n "$DEBUG" ]; then sed -r 's/^/  /g'; else cat; fi } >&2
+    fi | { if [ -n "$DEBUG" ]; then sed_compat 's/^/  /g'; else cat; fi } >&2
     if [ -z "$DRY_RUN" ]; then
         debug "${WHITE}Execution:${NORMAL}"
         if [ -z "$ENTER" ]; then