Rework compile method

README.md

@@ -17,6 +17,7 @@ Requirements:
 
 Optional:
 - pixz/pigz (faster compression/decompression)
+- shfmt (minimize zpkg on compile)
 
 ### Installing
 

compile.sh

@@ -1,24 +1,6 @@
 #!/bin/sh
 
-# config
-# no spaces in srcdir or ordered files
-SRCDIR=src
-ordered='env.sh options.sh config.sh main.sh'
+cd "$(dirname "$(readlink -f "$0")")"
 
-# process
-COMMENTSCRIPT="/^\s*#/d;s/\s*#[^\"']*$//"
-
-# order list
-unset namefind list
-for I in $ordered
-do
-  namefind="$namefind ! -name $I"
-  list="$list $SRCDIR/$I"
-done
-
-findlist=$(find "$SRCDIR" -type f $namefind)
-
-# create file
-echo '#!/bin/sh' > zpkg
-sed $COMMENTSCRIPT $findlist $list >> zpkg
+scripts/shcompile src/main.sh > zpkg
 chmod +x zpkg

scripts/shcompile

@@ -0,0 +1,72 @@
+#!/bin/sh
+
+fname=$(basename "$0")
+usage()
+{
+  echo "$fname <file>
+Compile the target shell script into a single output
+Resolves '%include' lines with shell capacity"
+}
+
+# no arg
+[ $# -lt 1 ] && usage && exit 1
+
+[ -z "$TMPDIR" ] && TMPDIR=/tmp
+tmpdir="$TMPDIR/shcompile_$(tr -dc '[:alnum:]' < /dev/urandom | head -c10)"
+mkdir -p "$tmpdir"
+tmpfile="$tmpdir/ret"
+filelist="$tmpdir/list"
+headfile="$tmpdir/head"
+tailfile="$tmpdir/tail"
+
+stop()
+{
+  rm -rf "$tmpdir"
+  exit $1
+}
+
+infile=$1
+[ "$infile" = '-' ] && infile=/dev/stdin
+
+cat "$infile" >/dev/null 2>&1 || { echo "Error: cannot read '$infile'" >&2 && stop 2; }
+
+firstline=$(head -n1 "$infile" | grep '^#!/')
+[ -z "$firstline" ] && firstline='#!/bin/sh'
+
+cp "$infile" "$tmpfile"
+
+get_include_line()
+{
+  grep -m1 -n '^%include ' "$1" | cut -d':' -f1
+}
+
+echo "$1" > "$filelist"
+
+n=$(get_include_line "$tmpfile")
+while [ -n "$n" ]
+do
+  pre=$(head -n $((n-1)) "$tmpfile" > "$headfile")
+  post=$(tail -n +$((n+1)) "$tmpfile" > "$tailfile")
+  incarg=$(sed "$n""q;d" "$tmpfile" | cut -d ' ' -f2-)
+  inc=$(echo "for I in $incarg ; do echo \$I ; done" | sh)
+
+  cp "$headfile" "$tmpfile"
+  echo "$inc" | while read -r file
+  do
+    cat "$file" >/dev/null 2>&1 || { echo "Error when trying to include '$incarg': '$ln' could not be read" >&2 && stop 10; }
+    if ! grep -q "^$file\$" "$filelist"
+    then # not already included
+      cat "$file" >> "$tmpfile"
+      echo "$file" >> "$filelist"
+    fi
+  done
+  cat "$tailfile" >> "$tmpfile"
+  # get next include line
+  n=$(get_include_line "$tmpfile")
+done
+
+which shfmt >/dev/null 2>&1 && shfmt -w -mn "$tmpfile"
+echo "$firstline"
+cat "$tmpfile"
+
+stop 0

src/main.sh

@@ -1,5 +1,14 @@
 #!/bin/sh
 
+# ordered requirements
+%include src/util.sh
+%include src/env.sh
+%include src/options.sh
+%include src/config.sh
+
+# everything else
+%include src/*.sh
+
 case "$1" in
 list) awk '{print $1}' "$PKG_PATH/installed" 2>/dev/null | sort ;;
 list-all) awk '{print $1}' "$PKG_PATH/pkglist" 2>/dev/null | sort ;;