openfoam/META-INFO/README.md
Mark Olesen 7b14af4230 DOC: reorganize Requirements.md, additional note for openSUSE leap
- move unreferenced Config.md to wiki content
2021-06-10 08:38:20 +02:00

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## META-INFO
Meta-information is generally for OpenFOAM internal use only.
The format, content and meaning may be changed at anytime without
prior notice.
If any of these are changed, these are some of places that will need
to be updated accordingly:
- bin/foamEtcFile
- bin/tools/foamConfigurePaths
- bin/tools/foamPackRelease
- etc/openfoam
- wmake/scripts/wmake-build-info
### api-info
This file and its contents are to be tracked by git.
- File content (api) generated by `wmake -build-info` from the
`OPENFOAM` define in `wmake/rules/General/general`
- File content (patch) is manually generated content.
### build-info
This file is ***never*** to be tracked by git, but may be present in
shipped source archives.
- File content (branch, build) generated by `wmake -build-info` from
git information and cached from previous wmake (api)
### Content types
#### api
Format: `date +%y%m`
- 4-digit year-month (YYMM) integer corresponding to the major
release or in unusual cases an intermediate release.
Example, `2106` for the June-2021 release.
#### patch
Format: `date +%y%m%d`
- 6-digit year-month-day (YYMMDD) integer corresponding to a patch-level
for the given **released** API.
- The first release can have a patch value of `0` or `1` which
indicates that it is unpatched or just released. Alternatively
it can have a patch value corresponding to the release date.
The patch value is only meaningful together with the api value.
However, for *development* branches, the patch level should not be
ascribed too much meaning, but will often correspond to the last
merge with a *maintenance* (*eg*, `master`) branch.
### Flow of information
Changes in the build information must be reflected in information
available in the final binaries. Conversely, it is necessary for later
distributions to have a record of the same information.
| property | source | saved |
|-----------|---------------------------|------------|
| api | wmake/rules | api-info |
| patch | manual (api-info) | build-info |
| branch | git | build-info |
| build | git | build-info |
The command `wmake -build-info -check` is used to determine if
the saved information needs synchronization. The command
`wmake -build-info -update` performs the synchronization.
### Notes
The saved information is split into two separate files.
The `api-info` file contains more permanent information,
whereas the `build-info` is more transient in nature.
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2021-06-09