fix: all: fixes to get emacs-chess working on 30.2

- added lexical-binding headers to all source files
- replaced make-variable-buffer-local with defvar-local throughout source code
- replaced deprecated cl library with cl-lib, including replacing assert with cl-assert to emacs-chess-steps.el
- added proper headers and footers to test files when missing
- populated chess images and chess sounds directory
- fixed defcustom calling directory-files without error handling.
  xboard installation no longer required.

2 files changed, 35 insertions, 0 deletions

diff --git a/pieces b/pieces
deleted file mode 160000
-Subproject e1fd1a04010df93f18ff1c1d8d62ea23ce96029
diff --git a/pieces/xboard/convbm b/pieces/xboard/convbm
new file mode 100644
index 0000000..e577fdc
--- /dev/null
+++ b/pieces/xboard/convbm
@@ -0,0 +1,35 @@
+#!/bin/sh
+
+for size in 129 116 108 95 87 80 72 64 58 54 49 45 40 37 33 29 25 21 ; do
+
+  mkdir $size
+
+  for piece in p r n b q k ; do
+
+    name=${piece}ld${size}
+    echo $name
+    convert -pen green -draw 'color 0,0 floodfill' \
+	XBM:${piece}${size}o.bm tmp.xpm
+    sed < tmp.xpm > $size/$name.xpm -f convbm.sed -e s/magick/$name/
+
+    name=${piece}ll${size}
+    echo $name
+    convert -pen gray  -draw 'color 0,0 floodfill' \
+	XBM:${piece}${size}o.bm tmp.xpm
+    sed < tmp.xpm > $size/$name.xpm -f convbm.sed -e s/magick/$name/
+
+    name=${piece}dd${size}
+    echo $name
+    convert -pen green -draw 'color 0,0 floodfill' \
+	XBM:${piece}${size}s.bm tmp.xpm
+    sed < tmp.xpm > $size/$name.xpm -f convbm.sed -e s/magick/$name/
+
+    name=${piece}dl${size}
+    echo $name
+    convert -pen gray  -draw 'color 0,0 floodfill' \
+	XBM:${piece}${size}s.bm tmp.xpm
+    sed < tmp.xpm > $size/$name.xpm -f convbm.sed -e s/magick/$name/
+
+  done
+
+done