1 files changed, 54 insertions, 0 deletions
diff --git a/js/src/gdb/progressbar.py b/js/src/gdb/progressbar.py
new file mode 100644
index 0000000000..39c3628b18
--- /dev/null
+++ b/js/src/gdb/progressbar.py
@@ -0,0 +1,54 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# Text progress bar library, like curl or scp.
+
+import sys
+import datetime
+import time
+
+
+class ProgressBar(object):
+    def __init__(self, label, limit, label_width=12):
+        self.label = label
+        self.limit = limit
+        self.label_width = label_width
+        self.cur = 0
+        self.t0 = datetime.datetime.now()
+        self.fullwidth = None
+
+        self.barlen = 64 - self.label_width
+        self.fmt = (
+            "\r%-" + str(label_width) + "s %3d%% %-" + str(self.barlen) + "s| %6.1fs"
+        )
+
+    def update(self, value):
+        self.cur = value
+        pct = int(100.0 * self.cur / self.limit)
+        barlen = int(1.0 * self.barlen * self.cur / self.limit) - 1
+        bar = "=" * barlen + ">"
+        dt = datetime.datetime.now() - self.t0
+        dt = dt.seconds + dt.microseconds * 1e-6
+        line = self.fmt % (self.label[: self.label_width], pct, bar, dt)
+        self.fullwidth = len(line)
+        sys.stdout.write(line)
+        sys.stdout.flush()
+
+    # Clear the current bar and leave the cursor at the start of the line.
+    def clear(self):
+        if self.fullwidth:
+            sys.stdout.write("\r" + " " * self.fullwidth + "\r")
+            self.fullwidth = None
+
+    def finish(self):
+        self.update(self.limit)
+        sys.stdout.write("\n")
+
+
+if __name__ == "__main__":
+    pb = ProgressBar("test", 12)
+    for i in range(12):
+        pb.update(i)
+        time.sleep(0.5)
+    pb.finish()