[PATCH V2] fileset: add missing() predicate (issue4925)

[liscju]

# HG changeset patch
# User liscju <piotr.listkiewicz at gmail.com>
# Date 1447876532 -3600
#      Wed Nov 18 20:55:32 2015 +0100
# Node ID bb36967f45cdd21b816b3fec2f6e20cc24b3121d
# Parent  2da6a2dbfc42bdec4bcaf47da947c64ff959a59c
fileset: add missing() predicate (issue4925)

Help of status cmd defines status file of 'missing', what is
called in fileset 'deleted'. To stay consistent this patch
introduces missing() predicate which in fact is alias to
'deleted'.

diff -r 2da6a2dbfc42 -r bb36967f45cd mercurial/fileset.py
--- a/mercurial/fileset.py	Mon Nov 09 17:20:50 2015 -0500
+++ b/mercurial/fileset.py	Wed Nov 18 20:55:32 2015 +0100
@@ -159,13 +159,22 @@
 
 def deleted(mctx, x):
     """``deleted()``
-    File that is deleted according to :hg:`status`.
+    Alias for ``missing()``.
     """
     # i18n: "deleted" is a keyword
     getargs(x, 0, 0, _("deleted takes no arguments"))
     s = mctx.status().deleted
     return [f for f in mctx.subset if f in s]
 
+def missing(mctx, x):
+    """``missing()``
+    File that is missing according to :hg:`status`.
+    """
+    # i18n: "missing" is a keyword
+    getargs(x, 0, 0, _("missing takes no arguments"))
+    s = mctx.status().deleted
+    return [f for f in mctx.subset if f in s]
+
 def unknown(mctx, x):
     """``unknown()``
     File that is unknown according to :hg:`status`. These files will only be
@@ -441,6 +450,7 @@
     'grep': grep,
     'ignored': ignored,
     'hgignore': hgignore,
+    'missing': missing,
     'modified': modified,
     'portable': portable,
     'removed': removed,
@@ -511,7 +521,7 @@
 
     # do we need status info?
     if (_intree(['modified', 'added', 'removed', 'deleted',
-                 'unknown', 'ignored', 'clean'], tree) or
+                 'missing', 'unknown', 'ignored', 'clean'], tree) or
         # Using matchctx.existing() on a workingctx requires us to check
         # for deleted files.
         (ctx.rev() is None and _intree(_existingcallers, tree))):
diff -r 2da6a2dbfc42 -r bb36967f45cd tests/test-fileset-generated.t
--- a/tests/test-fileset-generated.t	Mon Nov 09 17:20:50 2015 -0500
+++ b/tests/test-fileset-generated.t	Wed Nov 18 20:55:32 2015 +0100
@@ -47,6 +47,13 @@
   ! missing_content2_missing-tracked
   ! missing_missing_missing-tracked
 
+  $ hg st -A 'set:missing()'
+  ! content1_content1_missing-tracked
+  ! content1_content2_missing-tracked
+  ! content1_missing_missing-tracked
+  ! missing_content2_missing-tracked
+  ! missing_missing_missing-tracked
+
   $ hg st -A 'set:unknown()'
   ? content1_missing_content1-untracked
   ? content1_missing_content3-untracked
diff -r 2da6a2dbfc42 -r bb36967f45cd tests/test-fileset.t
--- a/tests/test-fileset.t	Mon Nov 09 17:20:50 2015 -0500
+++ b/tests/test-fileset.t	Wed Nov 18 20:55:32 2015 +0100
@@ -73,6 +73,8 @@
   a2
   $ fileset 'deleted()'
   a1
+  $ fileset 'missing()'
+  a1
   $ fileset 'unknown()'
   c3
   $ fileset 'ignored()'