tests: introduce check-perf-code.py to add extra checks on perf.py

This patch introduces tests/check-perf-code.py as a preparation for
adding extra checks on contrib/perf.py in subsequent patches (mainly,
for historical portability).

At this change, check-perf-code.py doesn't add any extra check, and is
equal to check-code.py. This makes subsequent patch focus only on
adding an extra check on perf.py check-perf-code.py.

check-perf-code.py adds extra checks on perf.py by wrapping
contrib/check-code.py, because "filtering" by check-code.py (e.g.
normalize characters in string literal or comment line) is useful to
simplify regexp for check, and avoid false positive matching.

tests/check-perf-code.py

@@ -0,0 +1,30 b''
+#!/usr/bin/env python
+#
+# check-perf-code - (historical) portability checker for contrib/perf.py
+
+from __future__ import absolute_import
+
+import os
+import sys
+
+# write static check patterns here
+perfpypats = [
+  [
+  ],
+  # warnings
+  [
+  ]
+]
+
+if __name__ == "__main__":
+    # import contrib/check-code.py as checkcode
+    assert 'RUNTESTDIR' in os.environ, "use check-perf-code.py in *.t script"
+    contribpath = os.path.join(os.environ['RUNTESTDIR'], '..', 'contrib')
+    sys.path.insert(0, contribpath)
+    checkcode = __import__('check-code')
+
+    # register perf.py specific entry with "checks" in check-code.py
+    checkcode.checks.append(('perf.py', r'contrib/perf.py$', '',
+                             checkcode.pyfilters, perfpypats))
+
+    sys.exit(checkcode.main())

tests/test-contrib-perf.t

@@ -1,150 +1,155 b''
 #require test-repo
 
 Set vars:
 
   $ . "$TESTDIR/helpers-testrepo.sh"
   $ CONTRIBDIR="$TESTDIR/../contrib"
 
 Prepare repo:
 
   $ hg init
 
   $ echo this is file a > a
   $ hg add a
   $ hg commit -m first
 
   $ echo adding to file a >> a
   $ hg commit -m second
 
   $ echo adding more to file a >> a
   $ hg commit -m third
 
   $ hg up -r 0
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo merge-this >> a
   $ hg commit -m merge-able
   created new head
 
   $ hg up -r 2
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 perfstatus
 
   $ cat >> $HGRCPATH << EOF
   > [extensions]
   > perfstatusext=$CONTRIBDIR/perf.py
   > [perf]
   > presleep=0
   > stub=on
   > parentscount=1
   > EOF
   $ hg help perfstatusext
   perfstatusext extension - helper extension to measure performance
   
   list of commands:
   
    perfaddremove
                  (no help text available)
    perfancestors
                  (no help text available)
    perfancestorset
                  (no help text available)
    perfannotate  (no help text available)
    perfbranchmap
                  benchmark the update of a branchmap
    perfcca       (no help text available)
    perfchangeset
                  (no help text available)
    perfctxfiles  (no help text available)
    perfdiffwd    Profile diff of working directory changes
    perfdirfoldmap
                  (no help text available)
    perfdirs      (no help text available)
    perfdirstate  (no help text available)
    perfdirstatedirs
                  (no help text available)
    perfdirstatefoldmap
                  (no help text available)
    perfdirstatewrite
                  (no help text available)
    perffncacheencode
                  (no help text available)
    perffncacheload
                  (no help text available)
    perffncachewrite
                  (no help text available)
    perfheads     (no help text available)
    perfindex     (no help text available)
    perfloadmarkers
                  benchmark the time to parse the on-disk markers for a repo
    perflog       (no help text available)
    perflookup    (no help text available)
    perflrucachedict
                  (no help text available)
    perfmanifest  (no help text available)
    perfmergecalculate
                  (no help text available)
    perfmoonwalk  benchmark walking the changelog backwards
    perfnodelookup
                  (no help text available)
    perfparents   (no help text available)
    perfpathcopies
                  (no help text available)
    perfrawfiles  (no help text available)
    perfrevlog    Benchmark reading a series of revisions from a revlog.
    perfrevlogrevision
                  Benchmark obtaining a revlog revision.
    perfrevrange  (no help text available)
    perfrevset    benchmark the execution time of a revset
    perfstartup   (no help text available)
    perfstatus    (no help text available)
    perftags      (no help text available)
    perftemplating
                  (no help text available)
    perfvolatilesets
                  benchmark the computation of various volatile set
    perfwalk      (no help text available)
   
   (use "hg help -v perfstatusext" to show built-in aliases and global options)
   $ hg perfaddremove
   $ hg perfancestors
   $ hg perfancestorset 2
   $ hg perfannotate a
   $ hg perfbranchmap
   $ hg perfcca
   $ hg perfchangeset 2
   $ hg perfctxfiles 2
   $ hg perfdiffwd
   $ hg perfdirfoldmap
   $ hg perfdirs
   $ hg perfdirstate
   $ hg perfdirstatedirs
   $ hg perfdirstatefoldmap
   $ hg perfdirstatewrite
   $ hg perffncacheencode
   $ hg perffncacheload
   $ hg perffncachewrite
   $ hg perfheads
   $ hg perfindex
   $ hg perfloadmarkers
   $ hg perflog
   $ hg perflookup 2
   $ hg perflrucache
   $ hg perfmanifest 2
   $ hg perfmergecalculate -r 3
   $ hg perfmoonwalk
   $ hg perfnodelookup 2
   $ hg perfpathcopies 1 2
   $ hg perfrawfiles 2
   $ hg perfrevlog .hg/store/data/a.i
   $ hg perfrevlogrevision -m 0
   $ hg perfrevrange
   $ hg perfrevset 'all()'
   $ hg perfstartup
   $ hg perfstatus
   $ hg perftags
   $ hg perftemplating
   $ hg perfvolatilesets
   $ hg perfwalk
   $ hg perfparents
 
+Check perf.py for historical portability
+
+  $ cd "$TESTDIR/.."
+
+  $ "$TESTDIR"/check-perf-code.py contrib/perf.py