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-rwxr-xr-xscripts/gen_build_files.sh100
1 files changed, 47 insertions, 53 deletions
diff --git a/scripts/gen_build_files.sh b/scripts/gen_build_files.sh
index 09a95b507..1c1edcc12 100755
--- a/scripts/gen_build_files.sh
+++ b/scripts/gen_build_files.sh
@@ -9,43 +9,54 @@ mkdir include 2>/dev/null
srctree="$1"
+status() { printf ' %-8s%s\n' "$1" "$2"; }
+gen() { status "GEN" "$@"; }
+chk() { status "CHK" "$@"; }
+
+generate()
+{
+ local src="$1" dst="$2" header="$3" insert="$4"
+ #chk "${dst}"
+ (
+ echo "${header}"
+ if grep -qs '^INSERT$' "${src}"; then
+ sed -n '1,/^INSERT$/p' "${src}"
+ echo "${insert}"
+ sed -n '/^INSERT$/,$p' "${src}"
+ else
+ if [ -n "${insert}" ]; then
+ echo "ERROR: INSERT line missing in: ${src}" 1>&2
+ fi
+ cat "${src}"
+ fi
+ ) | sed '/^INSERT$/d' > "${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" >"$dst"
-fi
+generate \
+ "$srctree/include/applets.src.h" \
+ "include/applets.h" \
+ "/* DO NOT EDIT. This file is generated from applets.src.h */" \
+ "${s}"
# (Re)generate include/usage.h
-src="$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" >"$dst"
-fi
+generate \
+ "$srctree/include/usage.src.h" \
+ "include/usage.h" \
+ "/* DO NOT EDIT. This file is generated from usage.src.h */" \
+ "${s}"
# (Re)generate */Kbuild and */Config.in
{ cd -- "$srctree" && find . -type d; } | while read -r d; do
@@ -55,42 +66,25 @@ fi
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" >"$dst"
- fi
+ generate \
+ "${src}" "${dst}" \
+ "# DO NOT EDIT. This file is generated from Kbuild.src" \
+ "${s}"
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" >"$dst"
- fi
+ generate \
+ "${src}" "${dst}" \
+ "# DO NOT EDIT. This file is generated from Config.src" \
+ "${s}"
fi
done
-# Last read failed. This is normal. Don't exit with its error code:
exit 0