As a new Alire user - it's not clear to me how to go from:

$ alr init --lib my_lib
$ alr init --bin my_bin

...to actually being able to use my_lib in my_bin. Reading publishing.md, I can see that I need to run:

$ alr publish --tar

Publishing assistant: step 1 of 8: Verify user manifest

The release to be published contains this information:

my_lib=0.1.0-dev: Shiny new project
[...]
Do you want to proceed with this information?
[Y] Yes  [N] No  (default is No) y

Publishing assistant: step 2 of 8: Prepare remote source archive
warn: Not in a git repository, assuming plain sources.
✓ Source archive created successfully.
Please upload the archive generated at alire/archives/my_lib-0.1.0-dev.tbz2 to its definitive online storage location.
Once you have uploaded the file, enter its URL:
Enter URL> https://example.com/my_lib-0.1.0-dev.tbz2

The URL is: https://example.com/my_lib-0.1.0-dev.tbz2
Is this information correct?
[Y] Yes  [N] No  (default is Yes) Y

Publishing assistant: step 3 of 8: Verify origin URL
✓ Origin is of supported kind: SOURCE_ARCHIVE

Publishing assistant: step 4 of 8: Verify GitHub infrastructure
✓ User has a GitHub account: player1
error: You must fork the community index to your GitHub account:
error:    Please visit https://github.com/alire-project/alire-index and fork the repository.

..but I do not want to use GitHub for a newly created and in development library.

To just try and make something work locally - I was able to take the alire.toml from my_lib, renamed it to my_lib-0.1.0-dev.toml and gave it a fake [origin] section. I then placed it in a local index with the layout of the community index, and run:

$ alr index --add file:///home/user/local-alire/ --name local

It doesn't seem to have copied a file across though:

$ alr with my_lib
Requested changes:                                                       

   ✓ my_lib ~0.1.0-dev (add)
                                                              
Changes to dependency solution:

   + my_lib 0.1.0-dev (new)

Do you want to proceed?
[Y] Yes  [N] No  (default is Yes) y   
ⓘ Deploying my_lib=0.1.0-dev...

$ alr build
ⓘ Building my_bin/my_bin.gpr...                  
my_bin_config.gpr:2:06: unknown project file: "my_lib.gpr"
my_bin_config.gpr:2:06: imported by "/home/user/ada/my_bin/config/my_bin_config.gpr"
my_bin_config.gpr:2:06: imported by "/home/user/ada/my_bin/my_bin.gpr"
gprbuild: "/home/user/ada/my_bin/my_bin.gpr" processing failed

$ cp ../my_lib/my_lib.gpr . # I knew this wouldn't work but thought to try anyway
$ alr build
ⓘ Building my_bin/my_bin.gpr...                  
Setup
   [mkdir]        object directory for project My_Lib
   [mkdir]        library directory for project My_Lib
   [mkdir]        object directory for project My_Bin
   [mkdir]        exec directory for project My_Bin
my_bin.gpr:2:09: unit "my_bin" cannot belong to several projects
my_bin.gpr:2:09:   project "my_bin", "/home/user/ada/my_bin/src/my_bin.adb"
my_bin.gpr:2:09:   project "my_lib", "/home/user/ada/my_bin/src/my_bin.adb"
my_bin.gpr:2:09: unit "my_bin_config" cannot belong to several projects
my_bin.gpr:2:09:   project "my_bin", "/home/user/ada/my_bin/config/my_bin_config.ads"
my_bin.gpr:2:09:   project "my_lib", "/home/user/ada/my_bin/config/my_bin_config.ads"
my_bin.gpr:2:09: warning: there are no sources of language "Ada" in this project
gprbuild: "/home/user/ada/my_bin/my_bin.gpr" processing failed
error: Command ["gprbuild", "-s", "-j0", "-p", "-P", "/home/user/ada/my_bin/my_bin.gpr"] exited with code 4
error: Compilation failed.

Ideally, I think I'd just like to be able to do:

$ alr init --lib my_lib
$ alr init --bin my_bin
$ cd my_bin
$ alr with ../my_lib