#!/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
cd -- "$2" || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
+# In separate objtree build, include/ might not exist yet
+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="$srctree/include/applets.src.h"
-dst="include/applets.h"
-s=`sed -n 's@^//applet:@@p' -- */*.c */*/*.c`
-echo "/* DO NOT EDIT. This file is generated from applets.src.h */" >"$dst.$$.tmp"
-# Why "IFS='' read -r REPLY"??
-# This atrocity is needed to read lines without mangling.
-# IFS='' prevents whitespace trimming,
-# -r suppresses backslash handling.
-while IFS='' read -r REPLY; do
- test x"$REPLY" = x"INSERT" && REPLY="$s"
- printf "%s\n" "$REPLY"
-done <"$src" >>"$dst.$$.tmp"
-if test -f "$dst" && cmp -s "$dst.$$.tmp" "$dst"; then
- rm -- "$dst.$$.tmp"
-else
- echo " GEN $dst"
- mv -- "$dst.$$.tmp" "$dst"
-fi
+sed -n 's@^//applet:@@p' "$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
+# We add line continuation backslash after each line,
+# and insert empty line before each line which doesn't start
+# with space or tab
+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 \
+ "$srctree/include/usage.src.h" \
+ "include/usage.h" \
+ "/* DO NOT EDIT. This file is generated from usage.src.h */"
# (Re)generate */Kbuild and */Config.in
-find -type d | while read -r d; do
+# We skip .dotdirs - makes git/svn/etc users happier
+{ cd -- "$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
- #echo " CHK $dst"
+ mkdir -p -- "$d" 2>/dev/null
- s=`sed -n 's@^//kbuild:@@p' -- "$srctree/$d"/*.c`
-
- echo "# DO NOT EDIT. This file is generated from Kbuild.src" >"$dst.$$.tmp"
- while IFS='' read -r REPLY; do
- test x"$REPLY" = x"INSERT" && REPLY="$s"
- printf "%s\n" "$REPLY"
- done <"$src" >>"$dst.$$.tmp"
- if test -f "$dst" && cmp -s "$dst.$$.tmp" "$dst"; then
- rm -- "$dst.$$.tmp"
- else
- echo " GEN $dst"
- mv -- "$dst.$$.tmp" "$dst"
- fi
+ sed -n 's@^//kbuild:@@p' "$srctree/$d"/*.c \
+ | generate \
+ "${src}" "${dst}" \
+ "# DO NOT EDIT. This file is generated from Kbuild.src"
fi
src="$srctree/$d/Config.src"
dst="$d/Config.in"
if test -f "$src"; then
- #echo " CHK $dst"
-
- s=`sed -n 's@^//config:@@p' -- "$srctree/$d"/*.c`
+ mkdir -p -- "$d" 2>/dev/null
- echo "# DO NOT EDIT. This file is generated from Config.src" >"$dst.$$.tmp"
- while IFS='' read -r REPLY; do
- test x"$REPLY" = x"INSERT" && REPLY="$s"
- printf "%s\n" "$REPLY"
- done <"$src" >>"$dst.$$.tmp"
- if test -f "$dst" && cmp -s "$dst.$$.tmp" "$dst"; then
- rm -- "$dst.$$.tmp"
- else
- echo " GEN $dst"
- mv -- "$dst.$$.tmp" "$dst"
- fi
+ sed -n 's@^//config:@@p' "$srctree/$d"/*.c \
+ | generate \
+ "${src}" "${dst}" \
+ "# DO NOT EDIT. This file is generated from Config.src"
fi
done