#compdef install ginstall

local curcontext="$curcontext" lx ret=1
local -a line state state_descr common_args args tmp
local -A opt_args val_args

# These are *almost* common — non-GNU variants need to remove the long options
common_args=(
  '(--backup)-b[create backups of destination files]'
  '(-C -c --compare)'{-C,--compare}'[copy files; do nothing if identical destination file exists]'
  '(-C -c --compare)-c[copy files (default)]'
  '(-d --directory)'{-d,--directory}'[create directories]'
  '(-g --group)'{-g+,--group=}'[specify destination file group]: :_groups'
  '(-m --mode)'{-m+,--mode=}'[specify destination file mode]: :_modes'
  '(-o --owner)'{-o+,--owner=}'[specify destination file owner]: :_users'
  '(-p --preserve-timestamps)'{-p,--preserve-timestamps}'[preserve modification times]'
  '(-s --strip)'{-s,--strip}'[strip binaries]'
  '(-v --verbose)'{-v,--verbose}'[output verbosely]'
  '*: :_files'
)

if _pick_variant gnu='Free Soft' unix --version; then
  # Hide Linux-specific options on non-Linux platforms
  [[ $OSTYPE == linux* ]] || lx='!'
  args+=(
    $common_args
    '(-b --backup)--backup=[create backup; optionally specify method]:: :->controls'
    "${lx}--context=[like -Z, or specify SELinux security context to set]::SELinux security context"
    '-D[create all leading destination path components]'
    '(: -)--help[display help information]'
    "${lx}--preserve-context[preserve SELinux security context]"
    '--strip-program=[specify program used to strip binaries]:strip program:_files'
    '(-S --suffix)'{-S+,--suffix=}'[specify backup suffix]:backup suffix'
    '(-t --target-directory)'{-t+,--target-directory=}'[copy source to specified directory]: :_directories'
    '(-T --no-target-directory)'{-T,--no-target-directory}'[treat destination as regular file]'
    '(: -)--version[display version information]'
    "${lx}-Z[set SELinux security context on destination files to default type]"
  )

else
  args+=(
    ${common_args##((#s)|*\))(\*|)--*}
    '-B+[specify backup suffix for -b]:backup suffix'
    '-f+[specify destination file flags]: :_flags'
  )
  [[ $OSTYPE == dragonfly* ]] && args+=(
    '!-D+[no effect (compatibility with NetBSD)]: :_directories'
    '-L+[use user/group database files from specified directory]: :_directories'
    '-l[fall back to system files if user/group not found in -L directory]'
  )
  [[ $OSTYPE == netbsd* ]] && args+=(
    '-a+[specify shell command to run on files after install]:shell command'
    '-r[use temporary files to perform safe copy]'
    '-S+[specify arguments to pass to strip program]:arguments to strip program'
  )
  [[ $OSTYPE == (net|open)bsd* ]] && {
    # (Net|Open)BSD has no -v for some reason
    args=( ${args##((#s)|*\))(\*|)-v*} )
  }
  [[ $OSTYPE == openbsd* ]] && args+=(
    '-D[create all leading destination path components]'
    '-F[flush installed file contents to disk]'
  )
  [[ $OSTYPE == (darwin|dragonfly)* ]] && args+=(
    '-M[disable use of mmap(2)]'
  )
  [[ $OSTYPE == (freebsd|netbsd)* ]] && args+=(
    '-D+[specify destination directory used for metadata log]: :_directories'
    '-h+[store digest in metadata log using specified method]: :->digests'
    '(-C -c --compare)-l+[link files (rather than copy) using specified method]: :->linkflags'
    '-M+[log mtree(8) metadata for installed files to specified file]:metadata log file:_files'
    '+N+[use user/group database files from specified directory]: :_directories'
    '-T+[specify mtree(8) tags to store in metadata log]:mtree(8) tags'
    '-U[indicate that install is unprivileged]'
  )
  [[ $OSTYPE == netbsd* ]] || args+=(
    '-S[use temporary files to perform safe copy]'
  )
fi

_arguments -C -s -S : $args && ret=0

case $state in
  controls)
    tmp=(
      {none,off}':never make backups'
      {numbered,t}':make numbered backups'
      {existing,nil}':make numbered backups if they already exist'
      # 'never' actually means 'always'...
      {simple,never}':make simple backups'
    )
    _describe -t controls 'version control method' tmp && ret=0
    ;;
  digests)
    tmp=( none md5 rmd160 sha1 sha256 sha512 )
    [[ $OSTYPE == netbsd* ]] && tmp+=( sha384 )
    _values 'digest method' $tmp && ret=0
    ;;
  linkflags)
    tmp=(
      'h[hard links]'
      's[symlinks]'
      'm[mixed (hard links for files on same file system)]'
      'a[symlinks use absolute path]'
      'r[symlinks use relative path]'
    )
    _values -S '' 'link flags' $tmp && ret=0
    ;;
esac

return ret