ocda public surface + dub.json import-path and dyaml cleanupsHEADmain

Three small follow-ups to the ocda/outputs split:

1. Add src/sisudoc/ocda/package.d (module sisudoc.ocda) as a 2-line
   public re-export of sisudoc.ocda.abstraction. Provides downstream
   consumers with a canonical "import sisudoc.ocda;" entry point and
   a stable handle for eventual peer-repo packaging of the
   abstraction library.

2. Fix the D import-path root in dub.json so it matches the declared
   module names:
   - spine:abstraction sub-package
     "importPaths": [ "./src/sisudoc" ] -> [ "./src" ]
   - main package buildTypes (dmd, ldc2, ldmd2, gdc, gdmd)
     "-I=src/sisudoc" -> "-I=src"
   The modules are named sisudoc.ocda.* / sisudoc.outputs.* /
   sisudoc.* so the filesystem-based resolver needs to see
   ./src as the root (so <root>/sisudoc/ocda/X.d resolves).

3. Replace dyaml sub-package's destructive preGenerateCommands
   ("rm -rf ./src/ext_depends/D-YAML/{examples,testsuite}") with
   declarative excludedSourceFiles globs. The two directories do
   not exist in the vendored D-YAML tree, so the rm was a no-op
   in practice; the glob form is defensive (would silently skip
   them if they were ever re-introduced) and removes the
   destructive side-effect from every build.

(assisted by Claude-Code)

1 files changed, 68 insertions, 0 deletions

diff --git a/src/sisudoc/ocda/package.d b/src/sisudoc/ocda/package.d
new file mode 100644
index 0000000..7f32dfe
--- /dev/null
+++ b/src/sisudoc/ocda/package.d
@@ -0,0 +1,68 @@
+/+
+- Name: SisuDoc Spine, Doc Reform [a part of]
+  - Description: documents, structuring, processing, publishing, search
+    - static content generator
+
+  - Author: Ralph Amissah
+    [ralph.amissah@gmail.com]
+
+  - Copyright: (C) 2015 (continuously updated, current 2026) Ralph Amissah, All Rights Reserved.
+
+  - License: AGPL 3 or later:
+
+    Spine (SiSU), a framework for document structuring, publishing and
+    search
+
+    Copyright (C) Ralph Amissah
+
+    This program is free software: you can redistribute it and/or modify it
+    under the terms of the GNU AFERO General Public License as published by the
+    Free Software Foundation, either version 3 of the License, or (at your
+    option) any later version.
+
+    This program is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+    more details.
+
+    You should have received a copy of the GNU General Public License along with
+    this program. If not, see [https://www.gnu.org/licenses/].
+
+    If you have Internet connection, the latest version of the AGPL should be
+    available at these locations:
+    [https://www.fsf.org/licensing/licenses/agpl.html]
+    [https://www.gnu.org/licenses/agpl.html]
+
+  - Spine (by Doc Reform, related to SiSU) uses standard:
+    - docReform markup syntax
+      - standard SiSU markup syntax with modified headers and minor modifications
+    - docReform object numbering
+      - standard SiSU object citation numbering & system
+
+  - Homepages:
+    [https://www.sisudoc.org]
+    [https://www.doc-reform.org]
+
+  - Git
+    [https://git.sisudoc.org/]
+
++/
+/++
+  sisudoc.ocda - canonical entry point of the document-abstraction
+  library.
+
+  Pipeline position: markup -> abstraction -> output. This package is
+  the abstraction stage; the output stage lives in
+  sisudoc.outputs.io_out and consumes the values produced here.
+
+  This file re-exports sisudoc.ocda.abstraction (the documented public
+  API surface) so that consumers can write
+    import sisudoc.ocda;
+  and reach the entry points (spineAbstraction!(), docAbstraction!(),
+  spineAbstractionTxt) without depending on spine's directory layout.
+
+  No logic lives here.
++/
+module sisudoc.ocda;
+@safe:
+public import sisudoc.ocda.abstraction;