Add python coverage 3.7 to depot tools.

third_party/coverage/summary.py

Index: third_party/coverage/summary.py
diff --git a/third_party/coverage/summary.py b/third_party/coverage/summary.py
new file mode 100644
index 0000000000000000000000000000000000000000..c99c53034aacf0a82754bb8f4c415d6b9907b5b4
--- /dev/null
+++ b/third_party/coverage/summary.py
@@ -0,0 +1,86 @@
+"""Summary reporting"""
+
+import sys
+
+from coverage.report import Reporter
+from coverage.results import Numbers
+from coverage.misc import NotPython
+
+
+class SummaryReporter(Reporter):
+    """A reporter for writing the summary report."""
+
+    def __init__(self, coverage, config):
+        super(SummaryReporter, self).__init__(coverage, config)
+        self.branches = coverage.data.has_arcs()
+
+    def report(self, morfs, outfile=None):
+        """Writes a report summarizing coverage statistics per module.
+
+        `outfile` is a file object to write the summary to.
+
+        """
+        self.find_code_units(morfs)
+
+        # Prepare the formatting strings
+        max_name = max([len(cu.name) for cu in self.code_units] + [5])
+        fmt_name = "%%- %ds  " % max_name
+        fmt_err = "%s   %s: %s\n"
+        header = (fmt_name % "Name") + " Stmts   Miss"
+        fmt_coverage = fmt_name + "%6d %6d"
+        if self.branches:
+            header += " Branch BrMiss"
+            fmt_coverage += " %6d %6d"
+        width100 = Numbers.pc_str_width()
+        header += "%*s" % (width100+4, "Cover")
+        fmt_coverage += "%%%ds%%%%" % (width100+3,)
+        if self.config.show_missing:
+            header += "   Missing"
+            fmt_coverage += "   %s"
+        rule = "-" * len(header) + "\n"
+        header += "\n"
+        fmt_coverage += "\n"
+
+        if not outfile:
+            outfile = sys.stdout
+
+        # Write the header
+        outfile.write(header)
+        outfile.write(rule)
+
+        total = Numbers()
+
+        for cu in self.code_units:
+            try:
+                analysis = self.coverage._analyze(cu)
+                nums = analysis.numbers
+                args = (cu.name, nums.n_statements, nums.n_missing)
+                if self.branches:
+                    args += (nums.n_branches, nums.n_missing_branches)
+                args += (nums.pc_covered_str,)
+                if self.config.show_missing:
+                    args += (analysis.missing_formatted(),)
+                outfile.write(fmt_coverage % args)
+                total += nums
+            except KeyboardInterrupt:                   # pragma: not covered
+                raise
+            except:
+                report_it = not self.config.ignore_errors
+                if report_it:
+                    typ, msg = sys.exc_info()[:2]
+                    if typ is NotPython and not cu.should_be_python():
+                        report_it = False
+                if report_it:
+                    outfile.write(fmt_err % (cu.name, typ.__name__, msg))
+
+        if total.n_files > 1:
+            outfile.write(rule)
+            args = ("TOTAL", total.n_statements, total.n_missing)
+            if self.branches:
+                args += (total.n_branches, total.n_missing_branches)
+            args += (total.pc_covered_str,)
+            if self.config.show_missing:
+                args += ("",)
+            outfile.write(fmt_coverage % args)
+
+        return total.pc_covered