Fixes#7237Fixes#6404Fixes#6418Fixes#6369
Identify when binary relocation fails to remove all instances of the
source prefix (and report an error to the user unless they specify
-a to allow the old root to appear). This check occurs at two stages:
during "bincache create" all instances of the root are replaced with
a special placeholder string ("@@@@..."), and a failure occurs if the
root is detected at this point; when the binary package is extracted
there is a second check. This addresses #7237 and #6418.
This is intended to be compatible with previously-created binary
packages.
This also adds:
* Better error messages for "spack install --use-cache" (#6404)
* Faster relocation on Mac OS (using a single call to
install_name_tool for all files rather than a call for each file)
* Clean up when "buildcache create" fails (addresses #6369)
* Explicit error message when the spack instance extracting the binary
package uses a different install layout than the spack instance that
created the binary package (since this is currently not supported)
* Remove the option to create unsigned binary packages with -y
f5467957bc