iankelling.org Git - distro-setup/blob - conflink

   1 #!/bin/bash
   2
   3 source /a/bin/errhandle/errcatch-function
   4 source /a/bin/errhandle/bash-trace-function
   5
   6 errcatch
   7
   8 m() {
   9     echo "$*"
  10     "$@"
  11 }
  12 s() { sudo "$@"; }
  13 lnf() { /a/exe/lnf "$@"; }
  14
  15
  16 shopt -s nullglob
  17 shopt -s extglob # note, already set with bash -l
  18
  19 # If we make a link back to the root, we stop going deeper into subdir_files.
  20 # This makes it so we can do subdir directories.
  21 #
  22 # Also note, under filesystem/, symlinks are expanded.
  23
  24 subdir-link-r() {
  25     local root="$1"
  26     local targets=()
  27     if [[ $2 ]]; then
  28         targets=( "$2"/!(.git|..|.) )
  29     else
  30         for f in "$1"/!(.git|..|.); do
  31             [[ -d $f ]] && targets+=("$f") ||:
  32         done
  33     fi
  34     local below="$( readlink -f "$root/..")"
  35     for path in "${targets[@]}"; do
  36         local fullpath="$(readlink -f "$path")"
  37         #e $fullpath $below # debug
  38         if [[ -f $path || $(dirname $(readlink -f "$fullpath")) == "$below" ]]; then
  39             m lnf -T "$path" "$HOME/${path#$root/}"
  40         elif [[ -d "$path" ]]; then
  41             subdir-link-r "$root" "$path"
  42         fi
  43     done
  44 }
  45
  46
  47
  48 common-file-setup() {
  49     local dir fs x bdir f dst
  50     for dir in "$@"; do
  51         fs=$dir/filesystem
  52         if [[ -e $fs && $USER == ian ]]; then
  53             # note, symlinks get resolved, not copied.
  54             m s cp -RLT --preserve=mode,timestamps $fs /
  55         fi
  56
  57         # one program so far does not work with a symlink,
  58         # so we have to use a bind mount
  59         bdir=$dir/binds
  60         if [[ -e $bdir && $USER == ian ]]; then
  61             for f in $(find $bdir -type f); do
  62                 dst=/home/ian/${f##$bdir}
  63                 binds+="$f $dst none bind 0 0"$'\n'
  64                 if [[ ! -e $dst || $(stat -c%i $f $dst |uniq -u) ]]; then
  65                     if mountpoint -q $dst; then
  66                         s umount $dst
  67                     fi
  68                     # note: in future, may need to mkdir also
  69                     [[ -e $dst ]] || touch $dst
  70                     s mount --bind $f $dst
  71                 fi
  72             done
  73         fi
  74
  75         if [[ -e $dir/subdir_files ]]; then
  76             subdir-link-r $dir/subdir_files
  77         fi
  78         local x=( $dir/!(binds|subdir_files|filesystem|machine_specific|..|.) )
  79         (( ${#x[@]} >= 1 )) || continue
  80         m lnf ${x[@]} ~
  81     done
  82 }
  83
  84 binds=""
  85 all_dirs=({/a/c,/p/c}{,/machine_specific/$HOSTNAME})
  86 # note, we assume a group of hosts does not have the
  87 # same name as a single host, which is no problem on our scale.
  88 for x in /p/c/machine_specific/*.hosts; do
  89     if grep -qxF $HOSTNAME $x; then all_dirs+=( ${x%.hosts} ); fi
  90 done
  91
  92 c_dirs=(/a/c{,/machine_specific/$HOSTNAME})
  93 case $USER in
  94     ian)
  95         # p needs to go first so .ssh link is created, then config link inside it
  96         common-file-setup ${all_dirs[@]}
  97         if [[ $binds ]]; then
  98             s /a/exe/cedit conflink /etc/fstab <<<"$binds" || [[ $? == 1 ]]
  99         fi
 100         if [[ -d /etc/bind/bind-writable ]]; then
 101             # need bind writable dir for nsupdate, or else we get
 102             # named[20823]: /etc/bind/db.iank.pw.jnl: create: permission denied
 103             s chgrp bind /etc/bind/bind-writable
 104         fi
 105         sudo -u traci "$BASH_SOURCE"
 106         ;;
 107     traci)
 108         common-file-setup ${c_dirs[@]}
 109         ;;
 110     *)
 111         echo "$0: error: unexpected user"; exit 1
 112         ;;
 113 esac