printf: fix printf "%u\n" +18446744073709551614

[oweals/busybox.git] / scripts / gen_build_files.sh

diff --git a/scripts/gen_build_files.sh b/scripts/gen_build_files.sh
index 18c172d5ab74035d2d9b337a9c9e8c4b3a4a563e..f79fa2f83c60a45cc77950e73e97201e22eb6209 100755 (executable)
--- a/scripts/gen_build_files.sh
+++ b/scripts/gen_build_files.sh
@@ -1,5 +1,9 @@
 #!/bin/sh
 
+# Note: was using sed OPTS CMD -- FILES
+# but users complain that many sed implementations
+# are misinterpreting --.
+
 test $# -ge 2 || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
 
 # cd to objtree
@@ -9,86 +13,90 @@ mkdir include 2>/dev/null
 
 srctree="$1"
 
+status() { printf '  %-8s%s\n' "$1" "$2"; }
+gen() { status "GEN" "$@"; }
+chk() { status "CHK" "$@"; }
+
+generate()
+{
+       # NB: data to be inserted at INSERT line is coming on stdin
+       src="$1"
+       dst="$2"
+       header="$3"
+       #chk "${dst}"
+       {
+               # Need to use printf: different shells have inconsistent
+               # rules re handling of "\n" in echo params.
+               printf "%s\n" "${header}"
+               # print everything up to INSERT line
+               sed -n '/^INSERT$/ q; p' "${src}"
+               # copy stdin to stdout
+               cat
+               # print everything after INSERT line
+               sed -n '/^INSERT$/ {
+               :l
+                   n
+                   p
+                   bl
+               }' "${src}"
+       } >"${dst}.tmp"
+       if ! cmp -s "${dst}" "${dst}.tmp"; then
+               gen "${dst}"
+               mv "${dst}.tmp" "${dst}"
+       else
+               rm -f "${dst}.tmp"
+       fi
+}
+
 # (Re)generate include/applets.h
-src="$srctree/include/applets.src.h"
-dst="include/applets.h"
-s=`sed -n 's@^//applet:@@p' -- "$srctree"/*/*.c "$srctree"/*/*/*.c`
-old=`cat "$dst" 2>/dev/null`
-# Why "IFS='' read -r REPLY"??
-# This atrocity is needed to read lines without mangling.
-# IFS='' prevents whitespace trimming,
-# -r suppresses backslash handling.
-new=`echo "/* DO NOT EDIT. This file is generated from applets.src.h */"
-while IFS='' read -r REPLY; do
-       test x"$REPLY" = x"INSERT" && REPLY="$s"
-       printf "%s\n" "$REPLY"
-done <"$src"`
-if test x"$new" != x"$old"; then
-       echo "  GEN     $dst"
-       printf "%s\n" "$new" >"$dst"
-fi
+sed -n 's@^//applet:@@p' "$srctree"/*/*.c "$srctree"/*/*/*.c \
+| generate \
+       "$srctree/include/applets.src.h" \
+       "include/applets.h" \
+       "/* DO NOT EDIT. This file is generated from applets.src.h */"
 
 # (Re)generate include/usage.h
-src="$srctree/include/usage.src.h"
-dst="include/usage.h"
 # We add line continuation backslash after each line,
 # and insert empty line before each line which doesn't start
 # with space or tab
-# (note: we need to use \\\\ because of ``)
-s=`sed -n -e 's@^//usage:\([ \t].*\)$@\1 \\\\@p' -e 's@^//usage:\([^ \t].*\)$@\n\1 \\\\@p' -- "$srctree"/*/*.c "$srctree"/*/*/*.c`
-old=`cat "$dst" 2>/dev/null`
-new=`echo "/* DO NOT EDIT. This file is generated from usage.src.h */"
-while IFS='' read -r REPLY; do
-       test x"$REPLY" = x"INSERT" && REPLY="$s"
-       printf "%s\n" "$REPLY"
-done <"$src"`
-if test x"$new" != x"$old"; then
-       echo "  GEN     $dst"
-       printf "%s\n" "$new" >"$dst"
-fi
+TAB="$(printf '\tX')"
+TAB="${TAB%X}"
+LF="$(printf '\nX')"
+LF="${LF%X}"
+sed -n -e 's@^//usage:\([ '"$TAB"'].*\)$@\1 \\@p' \
+       -e 's@^//usage:\([^ '"$TAB"'].*\)$@\'"$LF"'\1 \\@p' \
+       "$srctree"/*/*.c "$srctree"/*/*/*.c \
+| generate \
+       "$srctree/include/usage.src.h" \
+       "include/usage.h" \
+       "/* DO NOT EDIT. This file is generated from usage.src.h */"
 
 # (Re)generate */Kbuild and */Config.in
-{ cd -- "$srctree" && find -type d; } | while read -r d; do
+# We skip .dotdirs - makes git/svn/etc users happier
+{ cd -- "$srctree" && find . -type d ! '(' -name '.?*' -prune ')'; } \
+| while read -r d; do
        d="${d#./}"
 
        src="$srctree/$d/Kbuild.src"
        dst="$d/Kbuild"
        if test -f "$src"; then
                mkdir -p -- "$d" 2>/dev/null
-               #echo "  CHK     $dst"
-
-               s=`sed -n 's@^//kbuild:@@p' -- "$srctree/$d"/*.c`
 
-               old=`cat "$dst" 2>/dev/null`
-               new=`echo "# DO NOT EDIT. This file is generated from Kbuild.src"
-               while IFS='' read -r REPLY; do
-                       test x"$REPLY" = x"INSERT" && REPLY="$s"
-                       printf "%s\n" "$REPLY"
-               done <"$src"`
-               if test x"$new" != x"$old"; then
-                       echo "  GEN     $dst"
-                       printf "%s\n" "$new" >"$dst"
-               fi
+               sed -n 's@^//kbuild:@@p' "$srctree/$d"/*.c \
+               | generate \
+                       "${src}" "${dst}" \
+                       "# DO NOT EDIT. This file is generated from Kbuild.src"
        fi
 
        src="$srctree/$d/Config.src"
        dst="$d/Config.in"
        if test -f "$src"; then
                mkdir -p -- "$d" 2>/dev/null
-               #echo "  CHK     $dst"
-
-               s=`sed -n 's@^//config:@@p' -- "$srctree/$d"/*.c`
 
-               old=`cat "$dst" 2>/dev/null`
-               new=`echo "# DO NOT EDIT. This file is generated from Config.src"
-               while IFS='' read -r REPLY; do
-                       test x"$REPLY" = x"INSERT" && REPLY="$s"
-                       printf "%s\n" "$REPLY"
-               done <"$src"`
-               if test x"$new" != x"$old"; then
-                       echo "  GEN     $dst"
-                       printf "%s\n" "$new" >"$dst"
-               fi
+               sed -n 's@^//config:@@p' "$srctree/$d"/*.c \
+               | generate \
+                       "${src}" "${dst}" \
+                       "# DO NOT EDIT. This file is generated from Config.src"
        fi
 done