#require sqlite

  $ cat >> $HGRCPATH <<EOF

  > [extensions]

  > sqlitestore =

  > EOF

New repo should not use SQLite by default

  $ hg init empty-no-sqlite

  $ cat empty-no-sqlite/.hg/requires

  dotencode

  fncache

  generaldelta

  revlogv1

  store

storage.new-repo-backend=sqlite is recognized

  $ hg --config storage.new-repo-backend=sqlite init empty-sqlite

  $ cat empty-sqlite/.hg/requires

  dotencode

  exp-sqlite-001

  exp-sqlite-comp-001=zstd (zstd !)

  exp-sqlite-comp-001=$BUNDLE2_COMPRESSIONS$ (no-zstd !)

  fncache

  generaldelta

  revlogv1

  store

  $ cat >> $HGRCPATH << EOF

  > [storage]

  > new-repo-backend = sqlite

  > EOF

Can force compression to zlib

  $ hg --config storage.sqlite.compression=zlib init empty-zlib

  $ cat empty-zlib/.hg/requires

  dotencode

  exp-sqlite-001

  exp-sqlite-comp-001=$BUNDLE2_COMPRESSIONS$

  fncache

  generaldelta

  revlogv1

  store

Can force compression to none

  $ hg --config storage.sqlite.compression=none init empty-none

  $ cat empty-none/.hg/requires

  dotencode

  exp-sqlite-001

  exp-sqlite-comp-001=none

  fncache

  generaldelta

  revlogv1

  store

Can make a local commit

  $ hg init local-commit

  $ cd local-commit

  $ echo 0 > foo

  $ hg commit -A -m initial

  adding foo

That results in a row being inserted into various tables

  $ sqlite3 .hg/store/db.sqlite << EOF

  > SELECT * FROM filepath;

  > EOF

  1|foo

  $ sqlite3 .hg/store/db.sqlite << EOF

  > SELECT * FROM fileindex;

  > EOF

  1|1|0|-1|-1|0|0|1||6/\xef(L\xe2\xca\x02\xae\xcc\x8d\xe6\xd5\xe8\xa1\xc3\xaf\x05V\xfe (esc)

  $ sqlite3 .hg/store/db.sqlite << EOF

  > SELECT * FROM delta;

  > EOF

  1|1|	\xd2\xaf\x8d\xd2"\x01\xdd\x8dH\xe5\xdc\xfc\xae\xd2\x81\xff\x94"\xc7|0 (esc)

Tracking multiple files works

  $ echo 1 > bar

  $ hg commit -A -m 'add bar'

  adding bar

  $ sqlite3 .hg/store/db.sqlite << EOF

  > SELECT * FROM filedata ORDER BY id ASC;

  > EOF

  1|1|foo|0|6/\xef(L\xe2\xca\x02\xae\xcc\x8d\xe6\xd5\xe8\xa1\xc3\xaf\x05V\xfe|-1|-1|0|0|1| (esc)

  2|2|bar|0|\xb8\xe0/d3s\x80!\xa0e\xf9Au\xc7\xcd#\xdb_\x05\xbe|-1|-1|1|0|2| (esc)

Multiple revisions of a file works

  $ echo a >> foo

  $ hg commit -m 'modify foo'

  $ sqlite3 .hg/store/db.sqlite << EOF

  > SELECT * FROM filedata ORDER BY id ASC;

  > EOF

  1|1|foo|0|6/\xef(L\xe2\xca\x02\xae\xcc\x8d\xe6\xd5\xe8\xa1\xc3\xaf\x05V\xfe|-1|-1|0|0|1| (esc)

  2|2|bar|0|\xb8\xe0/d3s\x80!\xa0e\xf9Au\xc7\xcd#\xdb_\x05\xbe|-1|-1|1|0|2| (esc)

  3|1|foo|1|\xdd\xb3V\xcd\xde1p@\xf7\x8e\x90\xb8*\x8b,\xe9\x0e\xd6j+|0|-1|2|0|3|1 (esc)

  $ cd ..