Public bug reported: It cannot convert squashfs and writable image to another format. When I do that, it shows message｀ERROR: Unsupported file type:｀. However, only sandbox images could be converted to another format.
$ singularity shell test.simg Singularity: Invoking an interactive shell within container... Singularity test.simg:~/> exit exit $ sudo singularity build --writable test-w.simg test.simg ERROR: Unsupported file type: test.simg Cleaning up... Build 2.4.2 from git repository source works as expected. # lsb_release -rd Description: Ubuntu Bionic Beaver (development branch) Release: 18.04 # apt-cache policy singularity-container singularity-container: Installed: 2.4.2-4 Candidate: 2.4.2-4 Version table: *** 2.4.2-4 500 500 http://jp.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages 100 /var/lib/dpkg/status ** Affects: singularity-container (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1754943 Title: build command don't convert a image file to other style To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/singularity-container/+bug/1754943/+subscriptions -- ubuntu-bugs mailing list firstname.lastname@example.org https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs