Merge branch 'balay/switch-master-to-main' into 'master'

Balay/switch master to main

See merge request petsc/petsc!3619

git: switch default branch from 'master' to 'main'

Merge branch 'knepley/feature-monitors-reorg' into 'master'

Knepley/feature monitors reorg

See merge request petsc/petsc!3631

KSP: Reorganized monitors - Now the residual can be viewed using -ksp_monitor draw and a plot can be made using -ksp_monitor draw::draw_lg - This also works for the true residual and error - We no

KSP: Reorganized monitors - Now the residual can be viewed using -ksp_monitor draw and a plot can be made using -ksp_monitor draw::draw_lg - This also works for the true residual and error - We noe register monitors so that dispatch based on viewer and format works - Add KSPMonitorLGCreate(), and remove KSPMonitorLGResidualNorm*() and KSPMonitorLGTrueResidualNorm*() - Add KSPMonitorError(), used by -ksp_monitor_error - Add arguments to KSPMonitorSetFromOptions() to allow line graphs to be configured - Remove SNESMonitorLGCreate() and SNESMonitorLGResidualNorm() which are now handled by the default monitor - PetscViewerAndFormat now allows a payload - VecView_Plex() and VecView_Plex_Local() must propagate the flag indicating zero BC

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Merge branch 'jed/deprecate-viewer-ascii-vtk' into 'master'

Jed/deprecate viewer ascii vtk

See merge request petsc/petsc!3142

PETSC_VIEWER_ASCII_VTK: deprecate, encourage use of XML

Merge branch 'barry/2020-08-16/fix-source-formatting' into 'master'

Turn on checkbadSource test to generate an error when found; fix all source code that causes errors

See merge request petsc/petsc

Merge branch 'barry/2020-08-16/fix-source-formatting' into 'master'

Turn on checkbadSource test to generate an error when found; fix all source code that causes errors

See merge request petsc/petsc!3064

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Turn on checkbadSource test to generate an error when found; fix all source code that causes errors

Commit-type: portability-fix, testing-fix, style-fix, feature, maintainability
/spend 1.5h

Merge branch 'forked-branch/lindad/failed-viewer' into 'master'

Forked branch/lindad/failed viewer

See merge request petsc/petsc!3023

Add option to snes to only print reason when diverged

- Introduces `PETSC_VIEWER_FAILED`
- Check whether `format == PETSC_VIEWER_FAILED` when deciding whether to
print in `SNESReasonView`

Merge branch 'dalcinl/binary-io' into 'master'

Binary IO Enhancements

See merge request petsc/petsc!2594

PETSCVIEWERBINARY: Add PetscViewerBinary{Read|Write}All()

* Abstract out MPI-IO vs stdio in a single collective call

PetscBinaryWrite: Remove `istemp` boolean flag

Merge branch 'knepley/feature-plex-exodusii-viewer' into 'master'

Knepley/feature plex exodusii viewer

See merge request petsc/petsc!2535

Plex: Added ExodusII viewer

Merge branch 'mark/fix-viewfromoptions' into 'master'

prototype for ViewFromOptions macro-->functions

See merge request petsc/petsc!2083

prototype for ViewFromOptions macro-->functions

Merge branch 'tisaac/feature-multiple-fields-complex-dmplex-vtk' into 'master'

Allow multiple fields and complex numbers in DMPlex VTK visualization

See merge request petsc/petsc!2247

Support viewing vecs with multifields in VTK from DMPlex

Change precedence when finding sections in DMPletscVTKWriteALL

Searching for "section" before resorting to DM makes it easier to view just a

Support viewing vecs with multifields in VTK from DMPlex

Change precedence when finding sections in DMPletscVTKWriteALL

Searching for "section" before resorting to DM makes it easier to view just a single
field of a vector: rather than computing a subdm, we just get the field section and
compose it with a thin duplicate of the vector

Use composed "section" in DMPlexVTKWriteAll_VTU

Handle multifield vecs in VecView_Plex_Local_VTK

Test VTK multifield output in ascii and vtu in snes tutorials ex24

Make plexvtu use the sections composed with the vectors, provide vector output, and have more sensible names

Tranfer vector fields expanded to 3 components in one transfer

Only put a number on a field if there is more than one field

Add fieldnum argument to PetscViewerVTKAddField()

Now a vector can be added only for a single field to be printed. We can add the same field
multiple times. This avoids copying fields of a vector into separate vectors for viewing

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Merge branch 'maint'

Remove use of _ and __ in front of PETSc include guards. Reason: C99 Reserved Identifiers

Commit-type: portability-fix

Merge remote-tracking branch 'origin/psanan/docs-remove-manconcepts' [PR #1733]

Man pages: remove Concepts: fields

These fields were previously stripped from the man pages by logic removed in
21a59cba2737d49dc2f0bd12c08db0d2a3f3f209

Remove these fields from all man pages (but

Man pages: remove Concepts: fields

These fields were previously stripped from the man pages by logic removed in
21a59cba2737d49dc2f0bd12c08db0d2a3f3f209

Remove these fields from all man pages (but not from examples).

This is accomplished with GNU sed (gsed on OS X), with the following commands.
*Warning* that this type of command can corrupt a .git directory,
so be cautious in reusing or modifying these commands. They first look
for and delete matching lines with a following line consisting of only whitespace,
and then delete any remaining matching lines.

find src -type f -not -path "*/examples/*" -not -name "*.html" -not -name "*.bib" -exec gsed -i '/Concepts:/ {N; /\n\s*$/d}' {} +
find src -type f -not -path "*/examples/*" -not -name "*.html" -not -name "*.bib" -exec gsed -i '/Concepts:/d' {} +
find include -type f -not -path "*/examples/*" -not -name "*.html" -not -name "*.bib" -exec gsed -i '/Concepts:/ {N; /\n\s*$/d}' {} +
find include -type f -not -path "*/examples/*" -not -name "*.html" -not -name "*.bib" -exec gsed -i '/Concepts:/d' {} +

Hints on the sed command obtained from: https://unix.stackexchange.com/questions/100754/how-to-delete-a-specific-line-and-the-following-blank-line-using-gnu-sed

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Merged in dalcinl/fix-clang-warnings (pull request #1671)

Fix clang warning -Wextra-semi-stmt

Approved-by: BarryFSmith <bsmith@mcs.anl.gov>

Fix clang warning -Wextra-semi-stmt

https://clang.llvm.org/docs/DiagnosticsReference.html#wextra-semi-stmt

warning: empty expression statement has no effect;
remove unnecessary ';' to silence this

Fix clang warning -Wextra-semi-stmt

https://clang.llvm.org/docs/DiagnosticsReference.html#wextra-semi-stmt

warning: empty expression statement has no effect;
remove unnecessary ';' to silence this warning [-Wextra-semi-stmt]
ierr = PetscOptionsTail();CHKERRQ(ierr);
^

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