ranger - mirror of ranger - a simple, vim-like file manager

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#!/bin/sh # returns 0 on successful build or nothing to build # non-zero exit status only on error during building set -e # stop immediately on error # [0-9]*.cc -> bootstrap.cc -> bootstrap_bin # (layers) | | # tangle $CXX # can also be called with a layer to only build until # $ ./build --until 050 UNTIL_LAYER=${2:-zzz} # we use two mechanisms to speed up rebuilds: # - older_than: run a command if the output is older than any of the inputs # - update: if a command is quick to run, always run it but update the result only on any change # # avoid combining both mechanisms to generate a single file # otherwise you'll see spurious messages about files being updated # risk: a file may unnecessarily update without changes, causing unnecessary work downstream test "$CXX" || export CXX=c++ test "$CC" || export CC=cc test "$CFLAGS" || export CFLAGS="-g -O3 -std=c++98" # CI has an ancient version; don't expect recent dialects export CFLAGS="$CFLAGS -Wall -Wextra -fno-strict-aliasing" # return 1 if $1 is older than _any_ of the remaining args older_than() { local target=$1 shift if [ ! -e $target ] then #? echo "$target doesn't exist" echo "updating $target" >&2 return 0 # success fi local f for f in $* do if [ $f -nt $target ] then echo "updating $target" >&2 return 0 # success fi done return 1 # failure } # redirect to $1, unless it's already identical update() { if [ ! -e $1 ] then cat > $1 else cat > $1.tmp diff -q $1 $1.tmp >/dev/null && rm $1.tmp || mv $1.tmp $1 fi } update_cp() { if [ ! -e $2/$1 ] then cp $1 $2 elif [ $1 -nt $2/$1 ] then cp $1 $2 fi } noisy_cd() { cd $1 echo "-- `pwd`" >&2 } older_than tools/enumerate tools/enumerate.cc && { $CXX $CFLAGS tools/enumerate.cc -o tools/enumerate } older_than tools/tangle tools/tangle.cc && { noisy_cd tools grep -h "^[^ #].*) {" tangle.cc |sed 's/ {.*/;/' |update tangle.function_list grep -h "^[[:space:]]*void test_" tangle.cc |sed 's/^\s*void $.*$() {$/\1,/' |update tangle.test_list grep -h "^\s*void test_" tangle.cc |sed 's/^\s*void $.*$() {.*/"\1",/' |update tangle.test_name_list $CXX $CFLAGS tangle.cc -o tangle ./tangle test noisy_cd .. # no effect; just to show us returning to the parent directory } LAYERS=$(tools/enumerate --until $UNTIL_LAYER |grep '.cc$') older_than bootstrap.cc $LAYERS tools/enumerate tools/tangle && { # no update here; rely on 'update' calls downstream tools/tangle $LAYERS > bootstrap.cc } grep -h "^[^[:space:]#].*) {$" bootstrap.cc |grep -v ":.*(" |sed 's/ {.*/;/' |update function_list grep -h "^\s*void test_" bootstrap.cc |sed 's/^\s*void $.*$() {.*/\1,/' |update test_list grep -h "^\s*void test_" bootstrap.cc |sed 's/^\s*void $.*$() {.*/"\1",/' |update test_name_list older_than bootstrap_bin bootstrap.cc *_list && { $CXX $CFLAGS bootstrap.cc -o bootstrap_bin echo } exit 0


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