From 83c88b4222f1787ed4f9f05061a5e583ee7b45ce Mon Sep 17 00:00:00 2001
From: Dylan Araps <dylan.araps@gmail.com>
Date: Tue, 20 Jul 2021 12:08:31 +0300
Subject: [PATCH] kiss: support escaping markers in sources files.

VERSION  -> resolved version
\VERSION -> VERSION

This allows users to disable substitution of specific markers
while keeping others functional.

Example (URL contains literal RELEASE):

https://github.com/jedisct1/libsodium/releases/download/VERSION-\RELEASE/libsodium-VERSION.tar.gz
---
 kiss | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/kiss b/kiss
index 3b5d7f9..d5cf101 100755
--- a/kiss
+++ b/kiss
@@ -105,7 +105,6 @@ fnr() {
     shift 1
 
     while :; do case $_fnr-$# in
-         raw:*) _fnr=${_fnr##raw:}; break ;;
         *"$1"*) _fnr=${_fnr%"$1"*}${2}${_fnr##*"$1"} ;;
            *-2) break ;;
              *) shift 2
@@ -333,14 +332,18 @@ pkg_source_resolve() {
     # path to the source if it already exists, error if not.
     ok "${2##\#*}" || { _res=; return; }
 
+    # Surround each replacement with substitutions to handled escaped markers.
+    # First substitution turns '\MARKER' into ' ' (can't appear in sources as
+    # they're already split on whitespace), second replaces 'MARKER' with its
+    # value and the third, turns ' ' into 'MARKER' (dropping \\).
     fnr "${2%"${2##*[!/]}"}" \
-        VERSION "$repo_ver" \
-        RELEASE "$repo_rel" \
-          MAJOR "$repo_major" \
-          MINOR "$repo_minor" \
-          PATCH "$repo_patch" \
-          IDENT "$repo_ident" \
-        PACKAGE "$repo_name"
+        \\VERSION \  VERSION "$repo_ver"   \  VERSION \
+        \\RELEASE \  RELEASE "$repo_rel"   \  RELEASE \
+        \\MAJOR   \  MAJOR   "$repo_major" \  MAJOR \
+        \\MINOR   \  MINOR   "$repo_minor" \  MINOR \
+        \\PATCH   \  PATCH   "$repo_patch" \  PATCH \
+        \\IDENT   \  IDENT   "$repo_ident" \  IDENT \
+        \\PACKAGE \  PACKAGE "$repo_name"  \  PACKAGE
 
     set -- "$1" "$_fnr" "${3%"${3##*[!/]}"}" "$4"