[PATCH libgpg-error v2] doc: clarify patch submission workflow

[Thorsten Behrens]

Signed-off-by: Thorsten Behrens <Thorsten.Behrens at CIB.de>
Co-authored-by: Todd Zullinger <tmz at pobox.com>
---
 doc/HACKING | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/doc/HACKING b/doc/HACKING
index e30b2f8..6bb1071 100644
--- a/doc/HACKING
+++ b/doc/HACKING
@@ -2,6 +2,11 @@
 #+TITLE: Various hacking notes
 #+STARTUP: showall
 
+* How to contribute
+
+  The following stuff explains some basic procedures you need to
+  follow if you want to contribute code or documentation.
+
 * No more ChangeLog files
 
   Do not modify any of the ChangeLog files in Libgpg-error.  Starting
@@ -23,3 +28,51 @@
   in a "real" ChangeLog file, but keep the maximum line length at 72
   or smaller, so that the generated ChangeLog lines, each with its
   leading TAB, will not exceed 80 columns.
+
+* Commit log keywords
+
+  - GnuPG-bug-id :: Values are comma or space delimited bug numbers
+                    from bug.gnupg.org pertaining to this commit.
+  - Debian-bug-id :: Same as above but from the Debian bug tracker.
+  - CVE-id :: CVE id number pertaining to this commit.
+  - Regression-due-to :: Commit id of the regression fixed by this commit.
+  - Fixes-commit :: Commit id this commit fixes.
+  - Reported-by :: Value is a name or mail address of a bug reporte.
+  - Suggested-by :: Value is a name or mail address of someone how
+                    suggested this change.
+  - Co-authored-by :: Name or mail address of a co-author
+  - Some-comments-by :: Name or mail address of the author of
+                        additional comments (commit log or code).
+  - Proofread-by :: Sometimes used by translation commits.
+  - Signed-off-by :: Name or mail address of the developer
+
+* Sending patches
+
+  - submitting patches, and subsequent discussions around them,
+    happens via the gnupg-devel at gnupg.org public mailing list
+
+  - send your patches to that list, preferably PGP/MIME signed. Make
+    sure to include a mention of 'libgpg-error' in the subject line,
+    the list is used for several different projects
+
+  - if you're working from the git repo, here's a suggested workflow:
+
+    - configure git send-email defaults:
+
+        git config format.subjectPrefix 'PATCH libgpg-error'
+        git config sendemail.to gnupg-devel at gnupg.org
+
+    - hack hack hack
+
+    - commit your changes; group changes into easily-reviewable commit
+      units, feel free to submit several patches at once
+
+    - e.g. if you want to submit a single patch on top of master, do:
+      git send-email --annotate -1
+
+    - e.g. if you have two commits on top of master, do:
+      git send-email --annotate --cover-letter -2
+      (that prompts you for a summary mail to precede your actual
+      patch mails)
+
+    - use --dry-run to test your setup
-- 
2.13.6