about summary refs log tree commit diff stats
path: root/archive/2.transect
diff options
context:
space:
mode:
Diffstat (limited to 'archive/2.transect')
0 files changed, 0 insertions, 0 deletions
 

generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-10-22 04:24:45 +0000


 



52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165


#!/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 ../../tools/enumerate ../../tools/enumerate.cc && {
  $CXX $CXXFLAGS ../../tools/enumerate.cc -o ../../tools/enumerate
}

older_than ../../tools/tangle ../../tools/tangle.cc && {
  noisy_cd ../../tools
    # auto-generate various lists (ending in '_list' by convention) {
    # list of function declarations, so I can define them in any order
    grep -h "^[^ #].*) {" tangle.cc  |sed 's/ {.*/;/'  |update tangle.function_list
    # list of tests to run
    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 ../archive/1.vm  # no effect; just to show us returning to the parent directory
}

LAYERS=$(../../tools/enumerate --until $UNTIL_LAYER  |grep '\.cc$')
older_than mu.cc $LAYERS ../../tools/enumerate ../../tools/tangle && {
  # no update here; rely on 'update' calls downstream
  ../../tools/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=$(../../tools/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




 

generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-10-22 04:24:46 +0000