diff mercurial/commands.py @ 26351:8c7d8d5e1e0f

mercurial: add debugextensions command (issue4676)

Add debugextensions command to help users debug their extension
problems. If there are no extensions command prints nothing,
otherwise it prints names of extension modules. If quiet or
verbose option is not specified it prints(after extensions name)
last version of mercurial in which given module was tested for
non internal modules or not tested with user mercurial version.

If verbose is specified it prints following information for every
extension: extension name, import source, testedwith and buglink
information.

Extensions are printed sorted by extension name.

--- a/mercurial/commands.py	Thu Sep 24 10:15:37 2015 +0300
+++ b/mercurial/commands.py	Thu Sep 10 16:53:07 2015 +0200
@@ -19,7 +19,7 @@
 import merge as mergemod
 import minirst, revset, fileset
 import dagparser, context, simplemerge, graphmod, copies
-import random
+import random, operator
 import setdiscovery, treediscovery, dagutil, pvec, localrepo
 import phases, obsolete, exchange, bundle2, repair, lock as lockmod
 import ui as uimod
@@ -2171,6 +2171,45 @@
         localrevs = opts.get('local_head')
         doit(localrevs, remoterevs)
 
+@command('debugextensions', formatteropts, [], norepo=True)
+def debugextensions(ui, **opts):
+    '''show information about active extensions'''
+    exts = extensions.extensions(ui)
+    fm = ui.formatter('debugextensions', opts)
+    for extname, extmod in sorted(exts, key=operator.itemgetter(0)):
+        extsource = extmod.__file__
+        exttestedwith = getattr(extmod, 'testedwith', None)
+        if exttestedwith is not None:
+            exttestedwith = exttestedwith.split()
+        extbuglink = getattr(extmod, 'buglink', None)
+
+        fm.startitem()
+
+        if ui.quiet or ui.verbose:
+            fm.write('name', '%s\n', extname)
+        else:
+            fm.write('name', '%s', extname)
+            if not exttestedwith:
+                fm.plain(_(' (untested!)\n'))
+            else:
+                if exttestedwith == ['internal'] or \
+                                util.version() in exttestedwith:
+                    fm.plain('\n')
+                else:
+                    lasttestedversion = exttestedwith[-1]
+                    fm.plain(' (%s!)\n' % lasttestedversion)
+
+        fm.condwrite(ui.verbose and extsource, 'source',
+                 _('  location: %s\n'), extsource or "")
+
+        fm.condwrite(ui.verbose and exttestedwith, 'testedwith',
+                 _('  tested with: %s\n'), ' '.join(exttestedwith or []))
+
+        fm.condwrite(ui.verbose and extbuglink, 'buglink',
+                 _('  bug reporting: %s\n'), extbuglink or "")
+
+    fm.end()
+
 @command('debugfileset',
     [('r', 'rev', '', _('apply the filespec on this revision'), _('REV'))],
     _('[-r REV] FILESPEC'))