file to generate sha1 <-> svn:rev mapping

git/git_sh1_to_svn_rev.py

+#!/usr/bin/env python3
+
+# generate svn rev-sha1 mapping
+
+import os
+CURRENT_DIR = os.path.abspath(os.path.dirname(__file__))
+SOURCE_DIR = os.path.normpath(os.path.abspath(os.path.normpath(os.path.join(CURRENT_DIR, "..", "..", ".."))))
+
+print("creating git-log of %r" % SOURCE_DIR)
+os.chdir(SOURCE_DIR)
+os.system('git log --all --format="%H %cd" --date=iso > "' + CURRENT_DIR + '/git_log.txt"')
+
+print("creating mapping...")
+os.chdir(CURRENT_DIR)
+time_to_sha1 = {}
+f = "git_log.txt"
+with open(f, "r", encoding="utf-8") as fh:
+    for l in fh:
+        sha1 = l[:40]
+        time = l[41:60]
+        time_to_sha1[time] = sha1
+os.remove("git_log.txt")
+
+# for reverse mapping
+rev_sha1_ls = []
+
+with open("rev_to_sha1.py", "w", encoding="utf-8") as fh_dst:
+    fh_dst.write("data = {\n")
+
+    f = "git_sh1_to_svn_rev.fossils"
+    with open(f, "r", encoding="utf-8") as fh:
+        for l in fh:
+            # skip 'SVN:'
+            rev, time = l[4:].split("\t", 1)
+            time = time.split("Z", 1)[0].replace("T", " ", 1)
+            sha1 = time_to_sha1.get(time)
+            if sha1 is not None:
+                fh_dst.write('%s: "%s",\n' % (rev, sha1))
+
+                rev_sha1_ls.append((rev, sha1))
+
+    fh_dst.write('}\n')
+
+print("written: rev_to_sha1.py")
+
+with open("sha1_to_rev.py", "w", encoding="utf-8") as fh_dst:
+    fh_dst.write("data = {\n")
+    for rev, sha1 in rev_sha1_ls:
+        fh_dst.write('"%s": %s,\n' % (sha1, rev))
+    fh_dst.write('}\n')
+
+print("written: sha1_to_rev.py")