PetscObjectFunctionCompose: clean up composed functions at Destroy time

Merge branch 'jolivet/feature-tile-matdensegetsubmatrix' into 'main'

MatDenseGetSubMatrix(): allow selection of rows

See merge request petsc/petsc!5337

MatDenseGetSubMatrix(): allow selection of rows

Merge branch 'stefanozampini/gdsw-mg' into 'main'

Implement AGDSW coarse spaces for PCMG

See merge request petsc/petsc!5256

Merge remote-tracking branch 'origin/release'

Merge branch 'jose/release/fix-matconjugate-lda' into 'release'

MATSEQDENSE: fix three operations that were not considering LDA

See merge request petsc/petsc!5325

MATSEQDENSE: realloc QR workspace if needed during solve

Add info printing on errors to ease debugging

MATSEQDENSE: fix ascii view() in complex scalars when lda!=m

MATSEQDENSE: fix three operations that were not considering LDA

Merge branch 'jose/mat-dense-shift' into 'main'

Mat: implement MatShift() for dense matrices

See merge request petsc/petsc!5191

Fix flops logged in MatScale_SeqDense() in case LDA!=M

Mat: implement MatShift() for dense matrices

Merge branch 'psanan/docs-sphinx-man-pages' into 'main'

Integrate Man Pages into Sphinx Docs

Closes #1132 and #1015

See merge request petsc/petsc!4989

Merge branch 'jolivet/housekeeping' into 'main'

General housekeeping

See merge request petsc/petsc!5192

MatDense: proper checks and cleanup

Merge branch 'barry/2022-04-28/rm-petsccheckfalse-mat' into 'main'

Remove the rest of the PetscCheckFalse() from the mat directory

See merge request petsc/petsc!5184

Docs: bulk add backticks to .seealso man page fields

```python
import os
import re
import fileinput

def _process_word(word):
comma = "," if word.endswith(",") else ""
return "`%s`%s" % (wor

Docs: bulk add backticks to .seealso man page fields

```python
import os
import re
import fileinput

def _process_word(word):
comma = "," if word.endswith(",") else ""
return "`%s`%s" % (word.rstrip(","), comma)

def _process_stripped_line(line):
return " ".join(map(_process_word, line.split()))

start_pattern = re.compile(r"^( *\.seealso:? )(.*$)")

def process_file(filename_full):
with fileinput.FileInput(filename_full, inplace=True) as f:
in_block = False
for line in f:
line_stripped = line.strip()
# end ".seealso blocks" on a blank line or C-style comment close
line_modified = None
if not line_stripped:
in_block = False
elif line_stripped.endswith("*/"):
in_block = False
else:
match = re.match(start_pattern,
line) # not stripped line
if match:
indent = " " * len(match.group(1))
in_block = True
line_modified = match.group(
1) + _process_stripped_line(
match.group(2).strip())
elif in_block:
line_modified = indent + _process_stripped_line(
line_stripped)
if line_modified:
print(line_modified) # prints to the file
else:
print(line, end="") # prints to the file

BASE_DIRS = ["src", "include"]
EXT = [".c", ".cxx", ".cpp", ".cu", ".h", ".hpp", ".hxx"]
EXCLUDE_DIRS = ["tests", "tutorials", "ftn-auto", "ftn-custom", "benchmarks"]

def main():
""" Process everything """
for base in BASE_DIRS:
for root, dirs, files in os.walk(base):
for filename in files:
if os.path.splitext(filename)[1] in EXT:
filename_full = os.path.join(root, filename)
print("FILE ---", filename_full)
process_file(filename_full)
for exclude_dir in EXCLUDE_DIRS:
if exclude_dir in dirs:
dirs.remove(exclude_dir)

if __name__ == "__main__":
main()
```

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Remove the rest of the PetscCheckFalse() from the mat directory

Commit-type: housekeeping
/spend 45m

Merge branch 'barry/2020-10-08/invert-block-diagonal-aij' into 'main'

add MatInvertVariableBlockEnvelope

See merge request petsc/petsc!3544

Implement MatInvertVariableBlockEnvelope() with test example

Commit-type: feature, example
/spend 12h
Reported-by: Olivier Jamond <olivier.jamond@cea.fr>

Merge branch 'barry/2022-04-01/fix-petsc-options-begin-end/release' into 'main'

Remove bogus error returns from Begin/End() macros

See merge request petsc/petsc!5069

Cleanup of introduction of PetscCall()

* remove bogus error flags from XXXBegin()/End() macros such as PetscOptionsBegin()/End()

* rename for consistency certain XXXBegin()/End() macros such as Mat

Cleanup of introduction of PetscCall()

* remove bogus error flags from XXXBegin()/End() macros such as PetscOptionsBegin()/End()

* rename for consistency certain XXXBegin()/End() macros such as MatPreallocateInitialize()/Finalize()

* fix many lingering ierr = XXX that arose from multiline function calls

* sync slepc/hpddm - to use snapshots with the same changes

Commit-type: error-checking, style-fix
/spend 8h

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Merge branch 'jolivet/feature-less-checkfalse' into 'main'

Dividing by four the number of PetscCheckFalse()

See merge request petsc/petsc!5072

Remove some PetscCheckFalse()

Merge branch 'barry/2022-03-30/strip-petscall-petsctrymethod' into 'main'

Do not wrap PetscTryMethod() PetscUseMethod() in PetscCall

See merge request petsc/petsc!5051