scripts: Initial version of Python imgtool
This is the start of a python implementation of imgtool. This
implements all of the functionality that was missing in the zep2newt.py
tool, namely creation of keypairs, and converting the public version of
these keys into C code.
diff --git a/scripts/imgtool/version.py b/scripts/imgtool/version.py
new file mode 100644
index 0000000..eac3667
--- /dev/null
+++ b/scripts/imgtool/version.py
@@ -0,0 +1,27 @@
+"""
+Semi Semantic Versioning
+
+Implements a subset of semantic versioning that is supportable by the image header.
+"""
+
+from collections import namedtuple
+import re
+
+SemiSemVersion = namedtuple('SemiSemVersion', ['major', 'minor', 'revision', 'build'])
+
+version_re = re.compile(r"""^([1-9]\d*)(\.([1-9]\d*)(\.([1-9]\d*)(\+([a-z1-9-][a-z0-9-]*))?)?)?$""")
+def decode_version(text):
+ """Decode the version string, which should be of the form maj.min.rev+build"""
+ # print("decode:", text)
+ m = version_re.match(text)
+ if m:
+ result = SemiSemVersion(
+ int(m.group(1)) if m.group(1) else 0,
+ int(m.group(3)) if m.group(3) else 0,
+ int(m.group(5)) if m.group(5) else 0,
+ int(m.group(7)) if m.group(7) else 0)
+ return result
+ else:
+ msg = "Invalid version number, should be maj.min.rev+build with later parts optional"
+ raise argparse.ArgumentTypeError(msg)
+