A script to build known versions of all shells we test against.

Right now they are the versions that come with Ubuntu 16.04.

test/spec.sh: If possible, use these hermetic shell binaries for spec
tests.

Addresses issue #42.

I'm not sure why, but I had to adjust two tests.

glob.test.sh:
  Upstream dash 0.5.8 also has the same bug as mksh.

  I'm not sure why the Ubuntu package, which is marked 0.5.8, doesn't
  have it.  Maybe they ported a patch over?

quote.test.sh:
  hermetic ash doesn't have this bug for some reason.

Also: the regex test is currently failing for ZSH because we're not
building with regex support.  To be fixed.

spec/glob.test.sh

@@ -199,6 +199,7 @@ echo [[z] []z]    # also accepted
## END

#### Glob of negated unescaped [[] and []]
# osh does this "correctly" because it defers to libc!
touch $TMP/_G
cd $TMP
echo _[^\[z] _[^\]z]  # the right way to do it
@@ -207,7 +208,7 @@ echo _[^[z] _[^]z]    # also accepted
_G _G
_G _G
## END
## BUG mksh STDOUT:
## BUG dash/mksh STDOUT:
_[^[z] _[^]z]
_[^[z] _[^]z]
## END

spec/quote.test.sh

@@ -175,9 +175,6 @@ echo -n $'\001' $'\377' | od -A n -c | sed 's/ \+/ /g'
## N-I dash STDOUT:
 $ 001 $ 377
## END
## BUG ash STDOUT:
 001 0O7
## END

#### $'' octal escapes with fewer than 3 chars
echo $'\1 \11 \11 \111' | od -A n -c | sed 's/ \+/ /g'

test/spec-bin.sh

@@ -0,0 +1,65 @@
#!/bin/bash
#
# Build binaries for the spec tests.
#
# Usage:
#   ./spec-bin.sh <function name>

set -o nounset
set -o pipefail
set -o errexit

readonly DIR=_tmp/spec-bin

download() {
  mkdir -p $DIR
  wget --no-clobber --directory $DIR \
    https://www.oilshell.org/blob/spec-bin/bash-4.3.tar.gz \
    https://www.oilshell.org/blob/spec-bin/busybox-1.22.0.tar.bz2 \
    https://www.oilshell.org/blob/spec-bin/dash-0.5.8.tar.gz \
    https://www.oilshell.org/blob/spec-bin/mksh-R52c.tgz \
    https://www.oilshell.org/blob/spec-bin/zsh-5.1.1.tar.xz
}

extract-all() {
  pushd $DIR
  for archive in *.tar.* *.tgz; do
    echo $archive
    tar --extract --file $archive
  done
  mv -v mksh mksh-R52c  # so it doesn't collide
  popd
}

build-all() {
  # bash/dash/zsh: ./configure; make
  # mksh: sh Build.sh
  # busybox: make defconfig (default config); make

  pushd $DIR
  # TODO: Are they all different?
  popd
}

link-all() {
  pushd $DIR
  ln -s -f -v bash-4.3/bash .
  ln -s -f -v dash-0.5.8/src/dash .
  ln -s -f -v zsh-5.1.1/Src/zsh .
  ln -s -f -v mksh-R52c/mksh .
  ln -s -f -v busybox-1.22.0/busybox ./ash
  popd
}

test-all() {
  for sh in bash dash zsh mksh ash; do
    $DIR/$sh -c 'echo "Hello from $0"'

    # bash and zsh depend on libtinfo, but others don't
    # ash and zsh depend on libm, but others don't
    # bash and zsh depend on libdl, but others don't
    ldd $DIR/$sh
  done
}

"$@"

test/spec.sh

@@ -14,11 +14,26 @@ die() {
  exit 1
}

readonly DASH=$(which dash 2>/dev/null || echo /bin/sh)
readonly BASH=$(which bash)
readonly MKSH=$(which mksh)
readonly ZSH=$(which zsh)
readonly BUSYBOX_ASH=_tmp/shells/ash
# For now, fall back to the shell in $PATH.
shell-path() {
  local name=$1
  if test -f _tmp/spec-bin/$name; then
    echo _tmp/spec-bin/$name
  else
    which $name
  fi
}

readonly DASH=$(shell-path dash)
readonly BASH=$(shell-path bash)
readonly MKSH=$(shell-path mksh)
readonly ZSH=$(shell-path zsh)

if test -f _tmp/spec-bin/ash; then
  readonly BUSYBOX_ASH=_tmp/spec-bin/ash
else
  readonly BUSYBOX_ASH=_tmp/shells/ash
fi

readonly OSH_PYTHON=${OSH_PYTHON:-bin/osh}
readonly OSH_OVM=${OSH_OVM:-_bin/osh}