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#
# Works like the built-in type "file", but gets gracefully ignored if the target/source does not exist or is undefined.
#
# Also, if the source or target doesn't exist, and the destination is a git repo, then the file is restored from git.
#
# All executable paths are hardcoded to their paths in debian.
#
# known limitations:
# * this is far too noisy
# * $restore does not work for directories
# * only file:// $source is supported
# * $content is not supported, only $target or $source.
# * does not auto-require all the parent directories like 'file' does
#
define try::file (
$ensure = undef,
$target = undef,
$source = undef,
$owner = undef,
$group = undef,
$recurse = undef,
$purge = undef,
$force = undef,
$mode = undef,
$restore = true) {
# dummy exec to propagate requires:
# metaparameter 'require' will get triggered by this dummy exec
# so then we just need to depend on this to capture all requires.
# exec { $name: command => "/bin/true" }
exec {
"chmod_${name}":
command => "/bin/chmod -R ${mode} '${name}'",
onlyif => "/usr/bin/test $mode",
refreshonly => true,
loglevel => debug;
"chown_${name}":
command => "/bin/chown -R ${owner} '${name}'",
onlyif => "/usr/bin/test $owner",
refreshonly => true,
loglevel => debug;
"chgrp_${name}":
command => "/bin/chgrp -R ${group} '${name}'",
onlyif => "/usr/bin/test $group",
refreshonly => true,
loglevel => debug;
}
if $target {
exec { "symlink_${name}":
command => "/bin/ln -s ${target} ${name}",
onlyif => "/usr/bin/test -d '${target}'",
}
} elsif $source {
if $ensure == 'directory' {
if $purge {
exec { "rsync_${name}":
command => "/usr/bin/rsync -r --delete '${source}/' '${name}'",
onlyif => "/usr/bin/test -d '${source}'",
unless => "/usr/bin/diff -rq '${source}' '${name}'",
notify => [Exec["chmod_${name}"], Exec["chown_${name}"], Exec["chgrp_${name}"]]
}
} else {
exec { "cp_r_${name}":
command => "/bin/cp -r '${source}' '${name}'",
onlyif => "/usr/bin/test -d '${source}'",
unless => "/usr/bin/diff -rq '${source}' '${name}'",
notify => [Exec["chmod_${name}"], Exec["chown_${name}"], Exec["chgrp_${name}"]]
}
}
} else {
exec { "cp_${name}":
command => "/bin/cp --remove-destination '${source}' '${name}'",
onlyif => "/usr/bin/test -e '${source}'",
unless => "/usr/bin/test ! -h '${name}' && /usr/bin/diff -q '${source}' '${name}'",
notify => [Exec["chmod_${name}"], Exec["chown_${name}"], Exec["chgrp_${name}"]]
}
}
}
#
# if the target/source does not exist (or is undef), and the file happens to be in a git repo,
# then restore the file to its original state.
#
if $target {
$target_or_source = $target
} else {
$target_or_source = $source
}
if ($target_or_source == undef) or $restore {
$file_basename = basename($name)
$file_dirname = dirname($name)
$command = "git rev-parse && unlink '${name}'; git checkout -- '${file_basename}' && chown --reference='${file_dirname}' '${name}'; true"
debug($command)
if $target_or_source == undef {
exec { "restore_${name}":
command => $command,
cwd => $file_dirname,
loglevel => info;
}
} else {
exec { "restore_${name}":
unless => "/usr/bin/test -e '${target_or_source}'",
command => $command,
cwd => $file_dirname,
loglevel => info;
}
}
}
}
|
