ship build: add defvar

1 files changed, 21 insertions, 29 deletions

diff --git a/ship/build b/ship/build
index ad902231..aa8806ca 100755
--- a/ship/build
+++ b/ship/build
@@ -12,16 +12,6 @@ build() {
   esac
 }
 
-# usage: debug_script VARNAME [DESCRIPTION]
-debug_script() {
-  if test "${debug-false}" = true; then
-    printf '====== %s%s\n%s\n' \
-        "$1" \
-        "${2+" ($2)"}" \
-        "$(eval echo \"\$$1\" | nl -b a)" >&2
-  fi
-}
-
 ## usage: #@include \([0-9A-Za-z]\+\) -> build_include \1 \2
 build_include() { cat<<EOF
 $1a\\
@@ -43,24 +33,18 @@ EOF
 
 ## usage: build_compile SRCFILE DSTFILE
 build_compile() {
-  srcfile="$(cat "$1")"
-  debug_script srcfile 'SRCFILE'
-
-  build_directives="$(make_build_directives "$0")"
-  debug_script build_directives '$0'
-
-  build_x_directive_loader="$(make_build_x_directive_loader "$0")"
-  debug_script build_x_directive_loader '$0'
+  defvar srcfile "$(cat "$1")" 'SRCFILE'
+  defvar build_directives "$(make_build_directives "$0")" '$0'
+  defvar build_x_directive_loader "$(make_build_x_directive_loader "$0")" '$0'
 
   eval "$build_x_directive_loader"
 
-  input_parser="$(make_input_parser "$0")"
-  sentinel="$(make_needs_compilation_sentinel $build_directives)"
+  defvar input_parser "$(make_input_parser "$0")"
+  defvar sentinel "$(make_needs_compilation_sentinel $build_directives)"
 
   while needs_compilation "$srcfile" "$sentinel"; do
-    script="$(make_sedscript_maker_shellscript "$srcfile" "$input_parser")"
-    srcfile="$(echo "$srcfile" | sed -n "$script")"
-    debug_script srcfile 'sed sedscript srcfile'
+    defvar script "$(make_sedscript_maker_shellscript "$srcfile" "$input_parser")"
+    defvar srcfile "$(echo "$srcfile" | sed -n "$script")" 'sed script srcfile'
   done
 
   echo "$srcfile" > "$2"
@@ -77,12 +61,9 @@ needs_compilation() {
 # Print a shellscript that creates a sedscript that resolves all the build
 # directives in SRCFILE.
 make_sedscript_maker_shellscript() {
-  sedscript_generator="$(echo "$1" | nl -b a -s ' ' | sed "$2")"
-  debug_script sedscript_generator 'sed input_parser srcfile'
-
-  sedscript="$(eval "$sedscript_generator")"
-  debug_script sedscript 'eval sedscript_generator'
-
+  defvar sedscript_generator "$(echo "$1" | nl -b a -s ' ' | sed "$2")" \
+      'sed input_parser srcfile'
+  defvar sedscript "$(eval "$sedscript_generator")" 'eval sedscript_generator'
   echo "$sedscript"
 }
 
@@ -151,5 +132,16 @@ make_needs_compilation_sentinel() {
   )\\)$"
 }
 
+## usage: defvar NAME VALUE [DESCRIPTION]
+defvar() {
+  eval "$1=\"\$2\""
+  if test "${debug-false}" = true; then
+    printf '====== %s%s\n%s\n' \
+        "$1" \
+        "${3+" ($3)"}" \
+        "$(eval echo \"\$$1\" | nl -b a)" >&2
+  fi
+}
+
 ## main
 build "$@"