add svn

devops/README.md

@@ -3,3 +3,4 @@
 DevOps notions, tools and procedures.
 
 - [git](git.md)
+- [SVN](svn.md)

devops/svn.md

@@ -0,0 +1,66 @@
+# SVN
+
+## Snippets
+
+### Diff only properties of a file
+
+```powershell
+svn diff -r 299:300 --depth empty file_or_folder # --depth empty = prop only
+```
+
+### Show working copy edits
+
+```shell
+svn status -u wc
+```
+
+### Delete last revision
+
+This can be used, for example, to fix a broken repo.
+
+In the example below, `r385` of repo `my-repo` will be used.
+
+> <https://superuser.com/a/315138>
+> <https://svnbook.red-bean.com/en/1.7/svn.ref.svnadmin.html>
+> <https://www.saas-secure.com/svn-hosting/svn-dump-restore.html>
+
+#### 1. create new repo
+
+```shell
+cd c:\path\to\svn\repositories # NOT working copies but the repositories folder
+svnadmin create my-repo-TMP
+```
+
+#### 2. dump old repo INTO new repo
+
+```shell
+svnadmin dump -r 0:384 my-repo | svnadmin load my-repo-TMP
+```
+
+OR, if it hangs, try this instead
+
+```shell
+svnrdump dump http://your-repo/url | svnrdump load http://your-repo-TMP/url
+```
+
+If also this errors out, you might have to create an empty pre-revision repository hook (or with "exit 0" content):
+
+- <https://stackoverflow.com/a/44307179>
+- <https://stackoverflow.com/a/44307179>
+
+OR, as a last try, dump to a file (`> x.dump`) THEN load it separately; [pay attention to `powershell` fking up line endings](https://stackoverflow.com/questions/48371447/piping-text-to-an-external-program-appends-a-trailing-newline), both in export and import; use `cmd` instead.
+
+#### 3. (maybe not necessary): set new repo UUID equal to old repo
+
+```shell
+svnadmin setuuid my-repo-TMP $(svnlook uuid my-repo)
+```
+
+OR run `svnadmin info my-repo` and take note of uuid, then run `svnadmin setuuid my-repo-TMP <repo-UUID-here>`.
+
+#### 4. rename/delete repos
+
+```shell
+mv my-repo my-repo-OLD # or just RMove it
+mv my-repo-TMP my-repo
+```