Add pypi support

README.rst

@@ -50,6 +50,7 @@ the pre-release identifier or local version segment::
     --pre TEXT      Set the pre-release identifier
     --local TEXT    Set the local version segment
     --canonicalize  Canonicalize the new version
+    --pypi          Get latest information about version from pypi.org
     --help          Show this message and exit.
 
 The `--reset` option should be used alongside with minor or major bump.

bump.py

@@ -1,6 +1,8 @@
 import re
 import sys
 
+import requests
+
 try:
     import configparser
 except ImportError:  # 2.7
@@ -10,7 +12,8 @@
 from first import first
 from packaging.utils import canonicalize_version
 
-pattern = re.compile(r"((?:__)?version(?:__)? ?= ?[\"'])(.+?)([\"'])")
+version_pattern = re.compile(r"((?:__)?version(?:__)? ?= ?[\"'])(.+?)([\"'])")
+name_pattern = re.compile(r"((?:__)?name(?:__)? ?= ?[\"'])(.+?)([\"'])")
 
 
 class SemVer(object):
@@ -87,13 +90,41 @@ class NoVersionFound(Exception):
     pass
 
 
+class NoNameFound(Exception):
+    pass
+
+
 def find_version(input_string):
-    match = first(pattern.findall(input_string))
+    match = first(version_pattern.findall(input_string))
     if match is None:
         raise NoVersionFound
     return match[1]
 
 
+def find_name(input_string):
+    match = first(name_pattern.findall(input_string))
+    if match is None:
+        raise NoNameFound
+    return match[1]
+
+
+def get_latest_version(name):
+    response = requests.get("https://pypi.org/pypi/{}/json".format(name)).json()
+    return response["info"]["version"]
+
+
+def compare_version(local_version, pypi_version):
+    from packaging import version
+
+    if local_version == pypi_version:
+        return local_version, False
+    return (
+        (local_version, True)
+        if version.parse(local_version) > version.parse(pypi_version)
+        else (pypi_version, False)
+    )
+
+
 @click.command()
 @click.option(
     "--major",
@@ -132,10 +163,12 @@ def find_version(input_string):
 @click.option(
     "--canonicalize", flag_value=True, default=None, help="Canonicalize the new version"
 )
+@click.option(
+    "--pypi", flag_value=True, default=None, help="Get latest version from pypi.org"
+)
 @click.argument("input", type=click.File("rb"), default=None, required=False)
 @click.argument("output", type=click.File("wb"), default=None, required=False)
-def main(input, output, major, minor, patch, reset, pre, local, canonicalize):
-
+def main(input, output, major, minor, patch, reset, pre, local, canonicalize, pypi):
     config = configparser.RawConfigParser()
     config.read([".bump", "setup.cfg"])
 
@@ -148,8 +181,22 @@ def main(input, output, major, minor, patch, reset, pre, local, canonicalize):
     canonicalize = canonicalize or config.get("bump", "canonicalize", fallback=False)
 
     contents = input.read().decode("utf-8")
+    lock = False
     try:
         version_string = find_version(contents)
+        if pypi:
+            pypi_version = get_latest_version(find_name(contents))
+            version_string, lock = compare_version(
+                version_string, get_latest_version(find_name(contents))
+            )
+            if lock:
+                click.echo(
+                    "Local version is higher: {} > {}.\nLooks like bump was done manually.".format(
+                        version_string, pypi_version
+                    )
+                )
+                sys.exit(0)
+
     except NoVersionFound:
         click.echo("No version found in ./{}.".format(input.name))
         sys.exit(1)
@@ -159,7 +206,7 @@ def main(input, output, major, minor, patch, reset, pre, local, canonicalize):
     version_string = str(version)
     if canonicalize:
         version_string = canonicalize_version(version_string)
-    new = pattern.sub("\g<1>{}\g<3>".format(version_string), contents)
+    new = version_pattern.sub("\g<1>{}\g<3>".format(version_string), contents)
     output.write(new.encode())
     click.echo(version_string)
 

setup.py

@@ -3,7 +3,7 @@
 
 setup(
     name="bump",
-    version="1.3.0",
+    version="1.4.0",
     description="Bumps package version numbers",
     long_description=open("README.rst").read(),
     license="MIT",
@@ -28,6 +28,7 @@
         "configparser ; python_version<'3'",
         "first",
         "packaging>=17.1",
+        "requests",
     ],
     entry_points={"console_scripts": ["bump = bump:main"]},
 )