t/t1509/prepare-chroot.sh

   1 #!/bin/sh
   2
   3 die() {
   4         echo >&2 "$@"
   5         exit 1
   6 }
   7
   8 xmkdir() {
   9         while [ -n "$1" ]; do
  10                 [ -d "$1" ] || mkdir "$1" || die "Unable to mkdir $1"
  11                 shift
  12         done
  13 }
  14
  15 R="$1"
  16
  17 [ "$(id -u)" -eq 0 ] && die "This script should not be run as root, what if it does rm -rf /?"
  18 [ -n "$R" ] || die "usage: prepare-chroot.sh <root>"
  19 [ -x git ] || die "This script needs to be executed at git source code's top directory"
  20 if [ -x /bin/busybox ]; then
  21         BB=/bin/busybox
  22 elif [ -x /usr/bin/busybox ]; then
  23         BB=/usr/bin/busybox
  24 else
  25         die "You need busybox"
  26 fi
  27
  28 xmkdir "$R" "$R/bin" "$R/etc" "$R/lib" "$R/dev"
  29 touch "$R/dev/null"
  30 echo "root:x:0:0:root:/:/bin/sh" > "$R/etc/passwd"
  31 echo "$(id -nu):x:$(id -u):$(id -g)::$(pwd)/t:/bin/sh" >> "$R/etc/passwd"
  32 echo "root::0:root" > "$R/etc/group"
  33 echo "$(id -ng)::$(id -g):$(id -nu)" >> "$R/etc/group"
  34
  35 [ -x "$R$BB" ] || cp $BB "$R/bin/busybox"
  36 for cmd in sh su ls expr tr basename rm mkdir mv id uname dirname cat true sed diff; do
  37         ln -f -s /bin/busybox "$R/bin/$cmd"
  38 done
  39
  40 mkdir -p "$R$(pwd)"
  41 rsync --exclude-from t/t1509/excludes -Ha . "$R$(pwd)"
  42 # Fake perl to reduce dependency, t1509 does not use perl, but some
  43 # env might slip through, see test-lib.sh, unset.*PERL_PATH
  44 sed 's|^PERL_PATH=.*|PERL_PATH=/bin/true|' GIT-BUILD-OPTIONS > "$R$(pwd)/GIT-BUILD-OPTIONS"
  45 for cmd in git $BB;do
  46         ldd $cmd | grep '/' | sed 's,.*\s\(/[^ ]*\).*,\1,' | while read i; do
  47                 mkdir -p "$R$(dirname $i)"
  48                 cp "$i" "$R/$i"
  49         done
  50 done
  51 cat <<EOF
  52 All is set up in $R, execute t1509 with the following commands:
  53
  54 sudo chroot $R /bin/su - $(id -nu)
  55 IKNOWWHATIAMDOING=YES ./t1509-root-worktree.sh -v -i
  56
  57 When you are done, simply delete $R to clean up
  58 EOF