view tests/test-update-dest.t @ 31890:ca7af5d15b21

chg: always wait for pager

Previously, when runcommand raises, chg aborts with, and does not wait for
pager. The call stack is like:

  hgc_runcommand -> handleresponse -> readchannel -> debugmsg("failed to
  read channel") -> exit(255)

That means, chg returns to the shell, then both the pager and the shell will
read from the terminal at the same time, causing problems.

This patch fixes that by using "atexit" to register the pager cleanup
function so chg will always wait for pager even if runcommand raises.

Test update.requiredest
  $ cd $TESTTMP
  $ cat >> $HGRCPATH <<EOF
  > [commands]
  > update.requiredest = True
  > EOF
  $ hg init repo
  $ cd repo
  $ echo a >> a
  $ hg commit -qAm aa
  $ hg up
  abort: you must specify a destination
  (for example: hg update ".::")
  [255]
  $ hg up .
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ HGPLAIN=1 hg up
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg --config commands.update.requiredest=False up
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ cd ..

Check update.requiredest interaction with pull --update
  $ hg clone repo clone
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd repo
  $ echo a >> a
  $ hg commit -qAm aa
  $ cd ../clone
  $ hg pull --update
  abort: update destination required by configuration
  (use hg pull followed by hg update DEST)
  [255]