diff options
Diffstat (limited to 'archive/2.vm/build2')
| -rwxr-xr-x | archive/2.vm/build2 | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/archive/2.vm/build2 b/archive/2.vm/build2 new file mode 100755 index 00000000..b07e8a63 --- /dev/null +++ b/archive/2.vm/build2 @@ -0,0 +1,175 @@ +#!/bin/sh +# Alternative to build1 that tries to avoid redoing redundant work. +# Also splits compilation into multiple .cc files (see 'cleave' below). +# Faster than build1 for recompiling after small changes. +# +# For details on the basic form of this script, see https://notabug.org/akkartik/basic-build. + +set -e # stop immediately on error + +# Some environment variables that can be passed in. For example, to turn off +# optimization: +# $ CFLAGS=-g ./build2 +test "$CXX" || export CXX=c++ +test "$CC" || export CC=cc +test "$CFLAGS" || export CFLAGS="-g -O2" +export CFLAGS="$CFLAGS -Wall -Wextra -ftrapv -fno-strict-aliasing" +export CXXFLAGS="-std=c++98 $CFLAGS" # CI has an ancient version; don't expect recent dialects + +# Outline: +# [0-9]*.cc -> mu.cc -> .build/*.cc -> .build/*.o -> .build/mu_bin +# (layers) | | | | +# tangle cleave $CXX $CXX + +# can also be called with a layer to only build until +# $ ./build2 --until 050 +UNTIL_LAYER=${2:-zzz} + +# there's two mechanisms for fast builds here: +# - if a command is quick to run, always run it but update the result only on any change +# - otherwise run it only if the output is 'older_than' the inputs +# +# avoid combining both mechanisms for 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 + +# 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 ../../enumerate/enumerate ../../enumerate/enumerate.cc && { + $CXX $CXXFLAGS ../../enumerate/enumerate.cc -o ../../enumerate/enumerate +} + +older_than ../../tangle/tangle tangle/*.cc && { + noisy_cd ../../tangle + # auto-generate various lists (ending in '_list' by convention) { + # list of types + { + grep -h "^struct .* {" [0-9]*.cc |sed 's/\(struct *[^ ]*\).*/\1;/' + grep -h "^typedef " [0-9]*.cc + } |update type_list + # list of function declarations, so I can define them in any order + grep -h "^[^ #].*) {" [0-9]*.cc |sed 's/ {.*/;/' |update function_list + # list of code files to compile + ls [0-9]*.cc |grep -v "\.test\.cc$" |sed 's/.*/#include "&"/' |update file_list + # list of test files to compile + ls [0-9]*.test.cc |sed 's/.*/#include "&"/' |update test_file_list + # list of tests to run + grep -h "^[[:space:]]*void test_" [0-9]*.cc |sed 's/^\s*void \(.*\)() {$/\1,/' |update test_list + grep -h "^\s*void test_" [0-9]*.cc |sed 's/^\s*void \(.*\)() {.*/"\1",/' |update test_name_list + # } + # Now that we have all the _lists, compile 'tangle' + $CXX $CXXFLAGS boot.cc -o tangle + ./tangle test + noisy_cd ../archive/2.vm # no effect; just to show us returning to the parent directory +} + +LAYERS=$(../../enumerate/enumerate --until $UNTIL_LAYER |grep '\.cc$') +older_than mu.cc $LAYERS ../../enumerate/enumerate ../../tangle/tangle && { + # no update here; rely on 'update' calls downstream + ../../tangle/tangle $LAYERS > mu.cc +} + +older_than ../../cleave/cleave ../../cleave/cleave.cc && { + $CXX $CXXFLAGS ../../cleave/cleave.cc -o ../../cleave/cleave + rm -rf .build +} + +mkdir -p .build +# auto-generate function declarations, so I can define them in any order +# functions start out unindented, have all args on the same line, and end in ') {' +# +# \/ ignore struct/class methods +grep -h "^[^[:space:]#].*) {$" mu.cc |grep -v ":.*(" |sed 's/ {.*/;/' |update .build/function_list +# auto-generate list of tests to run +grep -h "^\s*void test_" mu.cc |sed 's/^\s*void \(.*\)() {.*/\1,/' |update .build/test_list +grep -h "^\s*void test_" mu.cc |sed 's/^\s*void \(.*\)() {.*/"\1",/' |update .build/test_name_list +mkdir -p .build/termbox +update_cp termbox/termbox.h .build/termbox + +older_than mu_bin mu.cc *_list ../../cleave/cleave termbox/* && { + ../../cleave/cleave mu.cc .build + noisy_cd .build + # create the list of global variable declarations from the corresponding definitions + grep ';' global_definitions_list |sed 's/[=(].*/;/' |sed 's/^[^\/# ]/extern &/' |sed 's/^extern extern /extern /' |update global_declarations_list + for f in mu_*.cc + do + older_than `echo $f |sed 's/\.cc$/.o/'` $f header global_declarations_list function_list test_list && { + $CXX $CXXFLAGS -c $f + } + done + noisy_cd ../termbox + older_than utf8.o utf8.c && { + $CC $CFLAGS -c utf8.c + } + older_than termbox.o termbox.c termbox.h input.inl output.inl bytebuffer.inl && { + $CC $CFLAGS -c termbox.c + } + older_than libtermbox.a *.o && { + ar rcs libtermbox.a *.o + } + noisy_cd .. + $CXX $CXXFLAGS .build/*.o termbox/libtermbox.a -o .build/mu_bin + cp .build/mu_bin . +} + +## [0-9]*.mu -> core.mu + +MU_LAYERS=$(../../enumerate/enumerate --until $UNTIL_LAYER |grep '\.mu$') || exit 0 # ok if no .mu files +cat $MU_LAYERS |update core.mu + +exit 0 + +# scenarios considered: +# 0 status when nothing needs updating +# no output when nothing needs updating +# no output for mu.cc when .mu files modified +# touch mu.cc but don't modify it; no output on second build +# touch a .cc layer but don't modify it; no output on second build +# only a single layer is recompiled when changing a C++ function +# stop immediately after failure in tangle |