chore: added release utility

Author: evilsocket

release.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+import subprocess
+import re
+
+# print changelog
+current_tag = subprocess.run(
+    ["git", "describe", "--tags", "--abbrev=0"], capture_output=True, text=True
+).stdout.strip()
+if current_tag == "":
+    # os.system("git log HEAD --oneline")
+    interval = "HEAD"
+else:
+    print("current tag: %s" % current_tag)
+    interval = "%s..HEAD" % current_tag
+
+print(
+    "CHANGELOG:\n\n%s\n"
+    % subprocess.run(
+        ["git", "log", interval, "--oneline"], capture_output=True, text=True
+    ).stdout.strip()
+)
+
+version_match_re = r'^version\s*=\s*"([^"]+)"$'
+
+with open("Cargo.toml", "rt") as fp:
+    manifest = fp.read()
+
+# parse current version and get next from user
+m = re.findall(version_match_re, manifest, re.MULTILINE)
+if len(m) != 1:
+    print("could not parse current version from Cargo.toml")
+    quit()
+
+current_ver = m[0]
+next_ver = input("current version is %s, enter next: " % current_ver)
+
+# generate new manifest
+result = re.sub(
+    version_match_re, 'version = "%s"' % next_ver, manifest, 0, re.MULTILINE
+)
+with open("Cargo.toml", "w+t") as fp:
+    fp.write(result)
+
+# commit, push and create new tag
+print("git add Cargo.*")
+print("git commit -m 'releasing version %s'" % next_ver)
+print("git push")
+print("git tag -a v%s -m 'releasing v%s'" % (next_ver, next_ver))
+print("git push origin v%s" % next_ver)
+
+# print()
+# publish on crates.io
+# print("cargo publish")