f718e3a0d
Mike Frysinger
2010-11-16
Subject
gen_build_files.sh: rewrite with sed
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scripts/gen_build_files.sh+47 -53
| @@ -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 | |