diff mercurial/cmdutil.py @ 33548:4cd4344a53c4

status: add a flag to terse the output (issue4119)

This adds an experimental flag -t/--terse which will terse the output. The terse flag
will respect other flags which filters the output. The flag takes a string
whose value can be a subsequence of "marduic" (the order does not matter here.)

Ignored files are not considered while tersing unless -i flag is passed or 'i'
is there is the terse flag value.

The flag is experimental for testing as there may be cases which will produce
strange results with the flag. We can set the terse on by default by simply
passing 'u' to the cmdutil.tersestatus().

This patch also adds a test file with tests covering the new feature.

--- a/mercurial/cmdutil.py	Wed Jul 12 16:10:10 2017 +0530
+++ b/mercurial/cmdutil.py	Sat Jun 17 20:10:22 2017 +0530
@@ -400,6 +400,178 @@
 
     return commit(ui, repo, recordinwlock, pats, opts)
 
+def tersestatus(root, statlist, status, ignorefn, ignore):
+    """
+    Returns a list of statuses with directory collapsed if all the files in the
+    directory has the same status.
+    """
+
+    def numfiles(dirname):
+        """
+        Calculates the number of tracked files in a given directory which also
+        includes files which were removed or deleted. Considers ignored files
+        if ignore argument is True or 'i' is present in status argument.
+        """
+        if lencache.get(dirname):
+            return lencache[dirname]
+        if 'i' in status or ignore:
+            def match(localpath):
+                absolutepath = os.path.join(root, localpath)
+                if os.path.isdir(absolutepath) and isemptydir(absolutepath):
+                    return True
+                return False
+        else:
+            def match(localpath):
+                # there can be directory whose all the files are ignored and
+                # hence the drectory should also be ignored while counting
+                # number of files or subdirs in it's parent directory. This
+                # checks the same.
+                # XXX: We need a better logic here.
+                if os.path.isdir(os.path.join(root, localpath)):
+                    return isignoreddir(localpath)
+                else:
+                    # XXX: there can be files which have the ignored pattern but
+                    # are not ignored. That leads to bug in counting number of
+                    # tracked files in the directory.
+                    return ignorefn(localpath)
+        lendir = 0
+        abspath = os.path.join(root, dirname)
+        # There might be cases when a directory does not exists as the whole
+        # directory can be removed and/or deleted.
+        try:
+            for f in os.listdir(abspath):
+                localpath = os.path.join(dirname, f)
+                if not match(localpath):
+                    lendir += 1
+        except OSError:
+            pass
+        lendir += len(absentdir.get(dirname, []))
+        lencache[dirname] = lendir
+        return lendir
+
+    def isemptydir(abspath):
+        """
+        Check whether a directory is empty or not, i.e. there is no files in the
+        directory and all its subdirectories.
+        """
+        for f in os.listdir(abspath):
+            fullpath = os.path.join(abspath, f)
+            if os.path.isdir(fullpath):
+                # recursion here
+                ret = isemptydir(fullpath)
+                if not ret:
+                    return False
+            else:
+                return False
+        return True
+
+    def isignoreddir(localpath):
+        """
+        This function checks whether the directory contains only ignored files
+        and hence should the directory be considered ignored. Returns True, if
+        that should be ignored otherwise False.
+        """
+        dirpath = os.path.join(root, localpath)
+        for f in os.listdir(dirpath):
+            filepath = os.path.join(dirpath, f)
+            if os.path.isdir(filepath):
+                # recursion here
+                ret = isignoreddir(os.path.join(localpath, f))
+                if not ret:
+                    return False
+            else:
+                if not ignorefn(os.path.join(localpath, f)):
+                    return False
+        return True
+
+    def absentones(removedfiles, missingfiles):
+        """
+        Returns a dictionary of directories with files in it which are either
+        removed or missing (deleted) in them.
+        """
+        absentdir = {}
+        absentfiles = removedfiles + missingfiles
+        while absentfiles:
+            f = absentfiles.pop()
+            par = os.path.dirname(f)
+            if par == '':
+                continue
+            # we need to store files rather than number of files as some files
+            # or subdirectories in a directory can be counted twice. This is
+            # also we have used sets here.
+            try:
+                absentdir[par].add(f)
+            except KeyError:
+                absentdir[par] = set([f])
+            absentfiles.append(par)
+        return absentdir
+
+    indexes = {'m': 0, 'a': 1, 'r': 2, 'd': 3, 'u': 4, 'i': 5, 'c': 6}
+    # get a dictonary of directories and files which are missing as os.listdir()
+    # won't be able to list them.
+    absentdir = absentones(statlist[2], statlist[3])
+    finalrs = [[]] * len(indexes)
+    didsomethingchanged = False
+    # dictionary to store number of files and subdir in a directory so that we
+    # don't compute that again.
+    lencache = {}
+
+    for st in pycompat.bytestr(status):
+
+        try:
+            ind = indexes[st]
+        except KeyError:
+            # TODO: Need a better error message here
+            raise error.Abort("'%s' not recognized" % st)
+
+        sfiles = statlist[ind]
+        if not sfiles:
+            continue
+        pardict = {}
+        for a in sfiles:
+            par = os.path.dirname(a)
+            pardict.setdefault(par, []).append(a)
+
+        rs = []
+        newls = []
+        for par, files in pardict.iteritems():
+            lenpar = numfiles(par)
+            if lenpar == len(files):
+                newls.append(par)
+
+        if not newls:
+            continue
+
+        while newls:
+            newel = newls.pop()
+            if newel == '':
+                continue
+            parn = os.path.dirname(newel)
+            pardict[newel] = []
+            # Adding pycompat.ossep as newel is a directory.
+            pardict.setdefault(parn, []).append(newel + pycompat.ossep)
+            lenpar = numfiles(parn)
+            if lenpar == len(pardict[parn]):
+                newls.append(parn)
+
+        # dict.values() for Py3 compatibility
+        for files in pardict.values():
+            rs.extend(files)
+
+        rs.sort()
+        finalrs[ind] = rs
+        didsomethingchanged = True
+
+    # If nothing is changed, make sure the order of files is preserved.
+    if not didsomethingchanged:
+        return statlist
+
+    for x in xrange(len(indexes)):
+        if not finalrs[x]:
+            finalrs[x] = statlist[x]
+
+    return finalrs
+
 def findpossible(cmd, table, strict=False):
     """
     Return cmd -> (aliases, command table entry)