file:list and symbolic links

On Wed, Nov 6, 2019 at 11:41 AM Marco Lettere <m.lettere at gmail.com> wrote: > > Dear all, > > what is the rationale behind the fact that file:list has been rewritten > to not following symbolic links [1]? > > We had some jobs related code that relied on symlinks and stopped > working after moving to new version of BaseX. > > Is there any work around? By using children or the new descendants > functions maybe? > > Thanks for your support. > > Marco. > > [1] > https://github.com/BaseXdb/basex/blob/bbb62d1ec3e10b4fa1cc48bd4e16911fa73e46df/basex-core/src/main/java/org/basex/query/func/file/FileList.java#L103 >

> Hi Marco, > > The rationale is that symbolic links can lead to cycles if you have > circular dependencies in your directory structure. What I learnt is > that this happens quite frequently in practice. > > You can write an XQuery function with file:list and file:children, > which recursively calls itself for each directory entry. The following > function returns paths to all descendant files, excluding directories; > it should follow all symbolic links: > > declare function file:traverse($dir) { > for $child in file:children($dir) > return if (file:is-dir($child)) then ( > file:traverse($child) > ) else ( > $child > ) > }; > > Hope this helps, > Christian > > > On Wed, Nov 6, 2019 at 11:41 AM Marco Lettere <m.lettere at gmail.com> wrote: > > > > Dear all, > > > > what is the rationale behind the fact that file:list has been rewritten > > to not following symbolic links [1]? > > > > We had some jobs related code that relied on symlinks and stopped > > working after moving to new version of BaseX. > > > > Is there any work around? By using children or the new descendants > > functions maybe? > > > > Thanks for your support. > > > > Marco. > > > > [1] > > > https://github.com/BaseXdb/basex/blob/bbb62d1ec3e10b4fa1cc48bd4e16911fa73e46df/basex-core/src/main/java/org/basex/query/func/file/FileList.java#L103 > > >

Marco Lettere <m.lettere at gmail.com> schrieb am Sa., 9. Nov. 2019, 18:55: > I see your point Christian. Thank you. > Of course recursively following the dir structure may work. > Passing a boolean to switch the behaviour with a developer choice might be > viable? Or is the file:list function standardized by xquery or expath spec? > Have a nice weekend! > M. > > Il sab 9 nov 2019, 18:36 Christian Grün <christian.gruen at gmail.com> ha > scritto: > >> Hi Marco, >> >> The rationale is that symbolic links can lead to cycles if you have >> circular dependencies in your directory structure. What I learnt is >> that this happens quite frequently in practice. >> >> You can write an XQuery function with file:list and file:children, >> which recursively calls itself for each directory entry. The following >> function returns paths to all descendant files, excluding directories; >> it should follow all symbolic links: >> >> declare function file:traverse($dir) { >> for $child in file:children($dir) >> return if (file:is-dir($child)) then ( >> file:traverse($child) >> ) else ( >> $child >> ) >> }; >> >> Hope this helps, >> Christian >> >> >> On Wed, Nov 6, 2019 at 11:41 AM Marco Lettere <m.lettere at gmail.com> >> wrote: >> > >> > Dear all, >> > >> > what is the rationale behind the fact that file:list has been rewritten >> > to not following symbolic links [1]? >> > >> > We had some jobs related code that relied on symlinks and stopped >> > working after moving to new version of BaseX. >> > >> > Is there any work around? By using children or the new descendants >> > functions maybe? >> > >> > Thanks for your support. >> > >> > Marco. >> > >> > [1] >> > >> https://github.com/BaseXdb/basex/blob/bbb62d1ec3e10b4fa1cc48bd4e16911fa73e46df/basex-core/src/main/java/org/basex/query/func/file/FileList.java#L103 >> > >> >