Vanessasaurus 54e8e19a60 adding spack diff command (#22283) ... A `spack diff` will take two specs, and then use the spack.solver.asp.SpackSolverSetup to generate lists of facts about each (e.g., nodes, variants, etc.) and then take a set difference between the two to show the user the differences. Example output: $ spack diff python@2.7.8 python@3.8.11 ==> Warning: This interface is subject to change. --- python@2.7.8/tsxdi6gl4lihp25qrm4d6nys3nypufbf +++ python@3.8.11/yjtseru4nbpllbaxb46q7wfkyxbuvzxx @@ variant_value @@ - python patches a8c52415a8b03c0e5f28b5d52ae498f7a7e602007db2b9554df28cd5685839b8 + python patches 0d98e93189bc278fbc37a50ed7f183bd8aaf249a8e1670a465f0db6bb4f8cf87 @@ version @@ - openssl Version(1.0.2u) + openssl Version(1.1.1k) - python Version(2.7.8) + python Version(3.8.11) Currently this uses diff-like output but we will attempt to improve on this in the future. One use case for `spack diff` is whenever a user has a disambiguate situation and cannot remember how two different installs are different. The command can also output `--json` in the case of a more analysis type use case where we want to save complete data with all diffs and the intersection. However, the command is really more intended for a command line use case, and we likely will have an analyzer more suited to saving data Signed-off-by: vsoch <vsoch@users.noreply.github.com> Co-authored-by: vsoch <vsoch@users.noreply.github.com> Co-authored-by: Tamara Dahlgren <35777542+tldahlgren@users.noreply.github.com> Co-authored-by: Todd Gamblin <tgamblin@llnl.gov>		2021-07-30 00:08:38 -07:00
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spack	adding spack diff command (#22283)	2021-07-30 00:08:38 -07:00