$ hg init repo

  $ cd repo

  $ hg init subrepo

  $ echo a > subrepo/a

  $ hg -R subrepo ci -Am adda

  adding a

  $ echo 'subrepo = subrepo' > .hgsub

  $ hg ci -Am addsubrepo

  adding .hgsub

  $ echo b > subrepo/b

  $ hg -R subrepo ci -Am addb

  adding b

  $ hg ci -m updatedsub

ignore blanklines in .hgsubstate

  >>> open('.hgsubstate', 'wb').write(b'\n\n   \t \n   \n') and None

  $ hg st --subrepos

  M .hgsubstate

  $ hg revert -qC .hgsubstate

abort more gracefully on .hgsubstate parsing error

  $ cp .hgsubstate .hgsubstate.old

  >>> open('.hgsubstate', 'wb').write(b'\ninvalid') and None

  $ hg st --subrepos --cwd $TESTTMP -R $TESTTMP/repo

  abort: invalid subrepository revision specifier in 'repo/.hgsubstate' line 2

  [255]

  $ mv .hgsubstate.old .hgsubstate

delete .hgsub and revert it

  $ rm .hgsub

  $ hg revert .hgsub

  warning: subrepo spec file '.hgsub' not found

  warning: subrepo spec file '.hgsub' not found

delete .hgsubstate and revert it

  $ rm .hgsubstate

  $ hg revert .hgsubstate

delete .hgsub and update

  $ rm .hgsub

  $ hg up 0 --cwd $TESTTMP -R $TESTTMP/repo

  warning: subrepo spec file 'repo/.hgsub' not found

  warning: subrepo spec file 'repo/.hgsub' not found

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg st

  warning: subrepo spec file '.hgsub' not found

  ! .hgsub

  $ ls -A subrepo

  .hg

  a

delete .hgsubstate and update

  $ hg up -C

  warning: subrepo spec file '.hgsub' not found

  warning: subrepo spec file '.hgsub' not found

  2 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ rm .hgsubstate

  $ hg up 0

  other [destination] changed .hgsubstate which local [working copy] deleted

  use (c)hanged version or leave (d)eleted? c

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg st

  $ ls -A subrepo

  .hg

  a

Enable obsolete

  $ cat >> $HGRCPATH << EOF

  > [ui]

  > logtemplate= {rev}:{node|short} {desc|firstline}

  > [phases]

  > publish=False

  > [experimental]

  > evolution.createmarkers=True

  > EOF

check that we can update parent repo with missing (amended) subrepo revision

  $ hg up --repository subrepo -r tip

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg ci -m "updated subrepo to tip"

  created new head

  $ cd subrepo

  $ hg update -r tip

  0 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ echo foo > a

  $ hg commit --amend -m "addb (amended)"

  $ cd ..

  $ hg update --clean .

  revision 102a90ea7b4a in subrepository "subrepo" is hidden

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

check that --hidden is propagated to the subrepo

  $ hg -R subrepo up tip

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg ci -m 'commit with amended subrepo'

  $ echo bar > subrepo/a

  $ hg -R subrepo ci --amend -m "amend a (again)"

  $ hg --hidden cat subrepo/a

  foo

verify will warn if locked-in subrepo revisions are hidden or missing

  $ hg ci -m "amended subrepo (again)"

  $ hg --config extensions.strip= --hidden strip -R subrepo -qr 'tip' --config devel.strip-obsmarkers=no

  $ hg verify

  checking changesets

  checking manifests

  crosschecking files in changesets and manifests

  checking files

  checked 5 changesets with 5 changes to 2 files

  checking subrepo links

  subrepo 'subrepo' is hidden in revision a66de08943b6

  subrepo 'subrepo' is hidden in revision 674d05939c1e

  subrepo 'subrepo' not found in revision a7d05d9055a4

verifying shouldn't init a new subrepo if the reference doesn't exist

  $ mv subrepo b

  $ hg verify

  checking changesets

  checking manifests

  crosschecking files in changesets and manifests

  checking files

  checked 5 changesets with 5 changes to 2 files

  checking subrepo links

  0: repository $TESTTMP/repo/subrepo not found

  1: repository $TESTTMP/repo/subrepo not found

  3: repository $TESTTMP/repo/subrepo not found

  4: repository $TESTTMP/repo/subrepo not found

  $ ls -A

  .hg

  .hgsub

  .hgsubstate

  b

  $ mv b subrepo

  $ cd ..