tests/test-config.t

ui: refactor `readconfig()` into a form that can consume resources

The old form can't completely go away, because files outside of packages still
need to be read.  The name passed in here is a tuple of `package name, resource`
as needed by the resource API.

I like the idea of stating the config file is embedded in the executable by
listing is as `exe!package.resource`.  This would be consistent with how
`debuginstall` points to the executable for the python executable, lib, and
installed modules.  While in practice the filesystem path is available from the
backing ResourceReader when the resource is opened, it is a relative path on py2
and absolute on py3.  Further, while this would show in the `hg config` output
for each option if set as such here, it doesn't show in the `reading from...`
line when `--debug` is used.  The file isn't actually open where that prints, so
there's no way I see to get that info there.  So I opted for the simple prefix
to distinguish resources from files.

Differential Revision: https://phab.mercurial-scm.org/D7775

hide outer repo
  $ hg init

Invalid syntax: no value

  $ cat > .hg/hgrc << EOF
  > novaluekey
  > EOF
  $ hg showconfig
  hg: parse error at $TESTTMP/.hg/hgrc:1: novaluekey
  [255]

Invalid syntax: no key

  $ cat > .hg/hgrc << EOF
  > =nokeyvalue
  > EOF
  $ hg showconfig
  hg: parse error at $TESTTMP/.hg/hgrc:1: =nokeyvalue
  [255]

Test hint about invalid syntax from leading white space

  $ cat > .hg/hgrc << EOF
  >  key=value
  > EOF
  $ hg showconfig
  hg: parse error at $TESTTMP/.hg/hgrc:1:  key=value
  unexpected leading whitespace
  [255]

  $ cat > .hg/hgrc << EOF
  >  [section]
  > key=value
  > EOF
  $ hg showconfig
  hg: parse error at $TESTTMP/.hg/hgrc:1:  [section]
  unexpected leading whitespace
  [255]

Reset hgrc

  $ echo > .hg/hgrc

Test case sensitive configuration

  $ cat <<EOF >> $HGRCPATH
  > [Section]
  > KeY = Case Sensitive
  > key = lower case
  > EOF

  $ hg showconfig Section
  Section.KeY=Case Sensitive
  Section.key=lower case

  $ hg showconfig Section -Tjson
  [
   {
    "defaultvalue": null,
    "name": "Section.KeY",
    "source": "*.hgrc:*", (glob)
    "value": "Case Sensitive"
   },
   {
    "defaultvalue": null,
    "name": "Section.key",
    "source": "*.hgrc:*", (glob)
    "value": "lower case"
   }
  ]
  $ hg showconfig Section.KeY -Tjson
  [
   {
    "defaultvalue": null,
    "name": "Section.KeY",
    "source": "*.hgrc:*", (glob)
    "value": "Case Sensitive"
   }
  ]
  $ hg showconfig -Tjson | tail -7
   {
    "defaultvalue": null,
    "name": "*", (glob)
    "source": "*", (glob)
    "value": "*" (glob)
   }
  ]

Test config default of various types:

 {"defaultvalue": ""} for -T'json(defaultvalue)' looks weird, but that's
 how the templater works. Unknown keywords are evaluated to "".

 dynamicdefault

  $ hg config --config alias.foo= alias -Tjson
  [
   {
    "name": "alias.foo",
    "source": "--config",
    "value": ""
   }
  ]
  $ hg config --config alias.foo= alias -T'json(defaultvalue)'
  [
   {"defaultvalue": ""}
  ]
  $ hg config --config alias.foo= alias -T'{defaultvalue}\n'
  

 null

  $ hg config --config auth.cookiefile= auth -Tjson
  [
   {
    "defaultvalue": null,
    "name": "auth.cookiefile",
    "source": "--config",
    "value": ""
   }
  ]
  $ hg config --config auth.cookiefile= auth -T'json(defaultvalue)'
  [
   {"defaultvalue": null}
  ]
  $ hg config --config auth.cookiefile= auth -T'{defaultvalue}\n'
  

 false

  $ hg config --config commands.commit.post-status= commands -Tjson
  [
   {
    "defaultvalue": false,
    "name": "commands.commit.post-status",
    "source": "--config",
    "value": ""
   }
  ]
  $ hg config --config commands.commit.post-status= commands -T'json(defaultvalue)'
  [
   {"defaultvalue": false}
  ]
  $ hg config --config commands.commit.post-status= commands -T'{defaultvalue}\n'
  False

 true

  $ hg config --config format.dotencode= format -Tjson
  [
   {
    "defaultvalue": true,
    "name": "format.dotencode",
    "source": "--config",
    "value": ""
   }
  ]
  $ hg config --config format.dotencode= format -T'json(defaultvalue)'
  [
   {"defaultvalue": true}
  ]
  $ hg config --config format.dotencode= format -T'{defaultvalue}\n'
  True

 bytes

  $ hg config --config commands.resolve.mark-check= commands -Tjson
  [
   {
    "defaultvalue": "none",
    "name": "commands.resolve.mark-check",
    "source": "--config",
    "value": ""
   }
  ]
  $ hg config --config commands.resolve.mark-check= commands -T'json(defaultvalue)'
  [
   {"defaultvalue": "none"}
  ]
  $ hg config --config commands.resolve.mark-check= commands -T'{defaultvalue}\n'
  none

 empty list

  $ hg config --config commands.show.aliasprefix= commands -Tjson
  [
   {
    "defaultvalue": [],
    "name": "commands.show.aliasprefix",
    "source": "--config",
    "value": ""
   }
  ]
  $ hg config --config commands.show.aliasprefix= commands -T'json(defaultvalue)'
  [
   {"defaultvalue": []}
  ]
  $ hg config --config commands.show.aliasprefix= commands -T'{defaultvalue}\n'
  

 nonempty list

  $ hg config --config progress.format= progress -Tjson
  [
   {
    "defaultvalue": ["topic", "bar", "number", "estimate"],
    "name": "progress.format",
    "source": "--config",
    "value": ""
   }
  ]
  $ hg config --config progress.format= progress -T'json(defaultvalue)'
  [
   {"defaultvalue": ["topic", "bar", "number", "estimate"]}
  ]
  $ hg config --config progress.format= progress -T'{defaultvalue}\n'
  topic bar number estimate

 int

  $ hg config --config profiling.freq= profiling -Tjson
  [
   {
    "defaultvalue": 1000,
    "name": "profiling.freq",
    "source": "--config",
    "value": ""
   }
  ]
  $ hg config --config profiling.freq= profiling -T'json(defaultvalue)'
  [
   {"defaultvalue": 1000}
  ]
  $ hg config --config profiling.freq= profiling -T'{defaultvalue}\n'
  1000

 float

  $ hg config --config profiling.showmax= profiling -Tjson
  [
   {
    "defaultvalue": 0.999,
    "name": "profiling.showmax",
    "source": "--config",
    "value": ""
   }
  ]
  $ hg config --config profiling.showmax= profiling -T'json(defaultvalue)'
  [
   {"defaultvalue": 0.999}
  ]
  $ hg config --config profiling.showmax= profiling -T'{defaultvalue}\n'
  0.999

Test empty config source:

  $ cat <<EOF > emptysource.py
  > def reposetup(ui, repo):
  >     ui.setconfig(b'empty', b'source', b'value')
  > EOF
  $ cp .hg/hgrc .hg/hgrc.orig
  $ cat <<EOF >> .hg/hgrc
  > [extensions]
  > emptysource = `pwd`/emptysource.py
  > EOF

  $ hg config --debug empty.source
  read config from: * (glob)
  none: value
  $ hg config empty.source -Tjson
  [
   {
    "defaultvalue": null,
    "name": "empty.source",
    "source": "",
    "value": "value"
   }
  ]

  $ cp .hg/hgrc.orig .hg/hgrc

Test "%unset"

  $ cat >> $HGRCPATH <<EOF
  > [unsettest]
  > local-hgrcpath = should be unset (HGRCPATH)
  > %unset local-hgrcpath
  > 
  > global = should be unset (HGRCPATH)
  > 
  > both = should be unset (HGRCPATH)
  > 
  > set-after-unset = should be unset (HGRCPATH)
  > EOF

  $ cat >> .hg/hgrc <<EOF
  > [unsettest]
  > local-hgrc = should be unset (.hg/hgrc)
  > %unset local-hgrc
  > 
  > %unset global
  > 
  > both = should be unset (.hg/hgrc)
  > %unset both
  > 
  > set-after-unset = should be unset (.hg/hgrc)
  > %unset set-after-unset
  > set-after-unset = should be set (.hg/hgrc)
  > EOF

  $ hg showconfig unsettest
  unsettest.set-after-unset=should be set (.hg/hgrc)

Test exit code when no config matches

  $ hg config Section.idontexist
  [1]

sub-options in [paths] aren't expanded

  $ cat > .hg/hgrc << EOF
  > [paths]
  > foo = ~/foo
  > foo:suboption = ~/foo
  > EOF

  $ hg showconfig paths
  paths.foo:suboption=~/foo
  paths.foo=$TESTTMP/foo

edit failure

  $ HGEDITOR=false hg config --edit
  abort: edit failed: false exited with status 1
  [255]

config affected by environment variables

  $ EDITOR=e1 VISUAL=e2 hg config --debug | grep 'ui\.editor'
  $VISUAL: ui.editor=e2

  $ VISUAL=e2 hg config --debug --config ui.editor=e3 | grep 'ui\.editor'
  --config: ui.editor=e3

  $ PAGER=p1 hg config --debug | grep 'pager\.pager'
  $PAGER: pager.pager=p1

  $ PAGER=p1 hg config --debug --config pager.pager=p2 | grep 'pager\.pager'
  --config: pager.pager=p2

verify that aliases are evaluated as well

  $ hg init aliastest
  $ cd aliastest
  $ cat > .hg/hgrc << EOF
  > [ui]
  > user = repo user
  > EOF
  $ touch index
  $ unset HGUSER
  $ hg ci -Am test
  adding index
  $ hg log --template '{author}\n'
  repo user
  $ cd ..

alias has lower priority

  $ hg init aliaspriority
  $ cd aliaspriority
  $ cat > .hg/hgrc << EOF
  > [ui]
  > user = alias user
  > username = repo user
  > EOF
  $ touch index
  $ unset HGUSER
  $ hg ci -Am test
  adding index
  $ hg log --template '{author}\n'
  repo user
  $ cd ..

configs should be read in lexicographical order

  $ mkdir configs
  $ for i in `$TESTDIR/seq.py 10 99`; do
  >    printf "[section]\nkey=$i" > configs/$i.rc
  > done
  $ HGRCPATH=configs hg config section.key
  99