OCA · baimont · Aug 3, 2026
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
@@ -55,6 +55,8 @@ jobs:
       - uses: actions/checkout@v4
         with:
           persist-credentials: false
+      - name: Install Ghostscript
+        run: apt-get update && apt-get install -y ghostscript
       - name: Install addons and dependencies
         run: oca_install_addons
       - name: Check licenses

diff --git a/attachment_pdfa/README.rst b/attachment_pdfa/README.rst
@@ -0,0 +1,152 @@
+================
+Attachment PDF/A
+================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! source digest: sha256:607a7dc56a5708440b64968c78229b78bc02b715336989ba87460c94bd98e2fb
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |badge1| image:: https://img.shields.io/badge/maturity-Beta-yellow.png
+    :target: https://odoo-community.org/page/development-status
+    :alt: Beta
+.. |badge2| image:: https://img.shields.io/badge/licence-LGPL--3-blue.png
+    :target: http://www.gnu.org/licenses/lgpl-3.0-standalone.html
+    :alt: License: LGPL-3
+.. |badge3| image:: https://img.shields.io/badge/github-OCA%2Fstorage-lightgray.png?logo=github
+    :target: https://github.com/OCA/storage/tree/18.0/attachment_pdfa
+    :alt: OCA/storage
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/storage-18-0/storage-18-0-attachment_pdfa
+    :alt: Translate me on Weblate
+.. |badge5| image:: https://img.shields.io/badge/runboat-Try%20me-875A7B.png
+    :target: https://runboat.odoo-community.org/builds?repo=OCA/storage&target_branch=18.0
+    :alt: Try me on Runboat
+
+|badge1| |badge2| |badge3| |badge4| |badge5|
+
+This module extends Odoo's attachment system to support background
+conversion of PDF files to the **PDF/A-3** format.
+
+This module provides a flexible framework to automate PDF to PDF/A-3
+conversion via an asynchronous background cron:
+
+- **Opt-in via Mixin**: Rather than blindly converting all system PDFs,
+  models must opt-in by inheriting ``attachment.pdfa.mixin`` and
+  implementing conditional rules via
+  ``_attachment_must_be_pdfa(attachment)``.
+- **Cron**: Attachments requiring conversion are flagged via the
+  ``is_pdfa_needed`` field on ``ir.attachment`` and processed by a
+  background cron.
+- **Flexible Storage Strategy**: Configurable options allow converted
+  PDF/A files to either replace the original attachments or be saved
+  alongside them as new attachments.
+- **Pluggable Engine**: Offers conversion via **Ghostscript** or native
+  **Odoo** PDF writer.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Use Cases / Context
+===================
+
+In many legal frameworks and corporate archiving policies, business
+documents must be stored in a compliant, long-term preservation format
+like **PDF/A-3**.
+
+Installation
+============
+
+To install and use Ghostscript conversion (default engine):
+
+1. Ensure Ghostscript is installed on your Odoo server host system.
+2. Ensure the ``gs`` binary is available in the system execution PATH of
+   the user running Odoo.
+
+Configuration
+=============
+
+To configure this module:
+
+1. Go to **Settings** > **General Settings**.
+2. Scroll down to the **PDF/A Conversion** section under *Document
+   Settings*.
+3. Configure your options:
+
+   - **PDF to PDF/A Conversion Method**:
+
+     - **Ghostscript** (default).
+     - **Odoo**.
+     - **Disable**: Disables automatic conversion globally.
+
+   - **PDF/A Storage Strategy**:
+
+     - **Replace Original File** (default): Overwrites the original PDF
+       attachment with the PDF/A binary.
+     - **Store Beside Original File**: Preserves the original file and
+       creates a new attachment named ``<Filename>_PDFA.pdf`` alongside
+       it.
+
+4. Click **Save**.
+
+Usage
+=====
+
+To use this module:
+
+1. Create or generate a PDF attachment on a record whose model
+   implements ``attachment.pdfa.mixin`` (and where
+   ``_attachment_must_be_pdfa(attachment)`` evaluates to ``True``).
+2. The attachment automatically flags ``is_pdfa_needed = True``.
+3. The scheduled cron processes pending attachments in the background,
+   updating or creating attachments according to your configured storage
+   strategy.
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/storage/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us to smash it by providing a detailed and welcomed
+`feedback <https://github.com/OCA/storage/issues/new?body=module:%20attachment_pdfa%0Aversion:%2018.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+
+Do not contact contributors directly about support or help with technical issues.
+
+Credits
+=======
+
+Authors
+-------
+
+* ACSONE SA/NV
+
+Contributors
+------------
+
+- Zina Rasoamanana zina.rasoamanana@acsone.eu
+  (`Acsone <https://acsone.eu>`__)
+- Benoit Aimont benoit.aimont@acsone.eu (`Acsone <https://acsone.eu>`__)
+- Stéphane Bidoul stephane.bidoul@acsone.eu
+  (`Acsone <https://acsone.eu>`__)
+
+Maintainers
+-----------
+
+This module is maintained by the OCA.
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+This module is part of the `OCA/storage <https://github.com/OCA/storage/tree/18.0/attachment_pdfa>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.
diff --git a/attachment_pdfa/__init__.py b/attachment_pdfa/__init__.py
@@ -0,0 +1 @@
+from . import models
diff --git a/attachment_pdfa/__manifest__.py b/attachment_pdfa/__manifest__.py
@@ -0,0 +1,27 @@
+# Copyright 2026 ACSONE SA/NV
+# License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl).
+
+{
+    "name": "Attachment PDF/A",
+    "summary": """Convert PDF attachments to PDF/A""",
+    "version": "18.0.1.0.0",
+    "category": "Storage",
+    "license": "LGPL-3",
+    "author": "ACSONE SA/NV, Odoo Community Association (OCA)",
+    "website": "https://github.com/OCA/storage",
+    "depends": [
+        "base_setup",
+    ],
+    "data": [
+        "data/ir_cron.xml",
+        "data/config_parameter.xml",
+        "data/pdfa3_metadata.xml",
+        "views/res_config_settings.xml",
+    ],
+    "external_dependencies": {
+        "bin": [
+            "gs",
+        ],
+    },
+    "installable": True,
+}
diff --git a/attachment_pdfa/data/config_parameter.xml b/attachment_pdfa/data/config_parameter.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!-- Copyright 2026 ACSONE SA/NV
+     License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl). -->
+<odoo noupdate="1">
+    <record id="function_convert_pdfa" model="ir.config_parameter">
+        <field name="key">attachment_pdfa.method</field>
+        <field name="value">ghostscript</field>
+    </record>
+    <record id="storage_mode_pdfa" model="ir.config_parameter">
+        <field name="key">attachment_pdfa.mode</field>
+        <field name="value">replace</field>
+    </record>
+</odoo>
diff --git a/attachment_pdfa/data/iccprofiles_default_rgb.icc b/attachment_pdfa/data/iccprofiles_default_rgb.icc
diff --git a/attachment_pdfa/data/ir_cron.xml b/attachment_pdfa/data/ir_cron.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!-- Copyright 2026 ACSONE SA/NV
+     License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl). -->
+<odoo noupdate="1">
+    <record id="ir_cron_convert_pdfa" model="ir.cron">
+        <field name="name">Convert Attachments to PDF/A</field>
+        <field name="model_id" ref="model_ir_attachment" />
+        <field name="state">code</field>
+        <field name="code">model._cron_convert_pdfa()</field>
+        <field name="interval_number">1</field>
+        <field name="interval_type">days</field>
+    </record>
+</odoo>
diff --git a/attachment_pdfa/data/pdfa3_metadata.xml b/attachment_pdfa/data/pdfa3_metadata.xml
@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<odoo>
+    <template id="pdfa3_metadata">
+        <x:xmpmeta xmlns:x="adobe:ns:meta/">
+            <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
+                <rdf:Description
+                    xmlns:pdfaid="http://www.aiim.org/pdfa/ns/id/"
+                    rdf:about=""
+                >
+                    <pdfaid:part>3</pdfaid:part>
+                    <pdfaid:conformance>B</pdfaid:conformance>
+                </rdf:Description>
+                <rdf:Description
+                    xmlns:dc="http://purl.org/dc/elements/1.1/"
+                    rdf:about=""
+                >
+                    <dc:title>
+                        <rdf:Alt>
+                            <rdf:li t-att="{'xml:lang': 'x-default'}" t-out="title" />
+                        </rdf:Alt>
+                    </dc:title>
+                    <dc:creator>
+                        <rdf:Seq>
+                            <rdf:li>Odoo</rdf:li>
+                        </rdf:Seq>
+                    </dc:creator>
+                    <dc:description>
+                        <rdf:Alt>
+                            <rdf:li
+                                t-att="{'xml:lang': 'x-default'}"
+                            >PDF/A3 generated by Odoo</rdf:li>
+                        </rdf:Alt>
+                    </dc:description>
+                </rdf:Description>
+                <rdf:Description xmlns:pdf="http://ns.adobe.com/pdf/1.3/" rdf:about="">
+                    <pdf:Producer>Odoo</pdf:Producer>
+                </rdf:Description>
+                <rdf:Description xmlns:xmp="http://ns.adobe.com/xap/1.0/" rdf:about="">
+                    <xmp:CreatorTool>Odoo</xmp:CreatorTool>
+                    <xmp:CreateDate t-out="date" />
+                    <xmp:ModifyDate t-out="date" />
+                </rdf:Description>
+            </rdf:RDF>
+        </x:xmpmeta>
+    </template>
+</odoo>
diff --git a/attachment_pdfa/data/pdfa_def.ps b/attachment_pdfa/data/pdfa_def.ps
diff --git a/attachment_pdfa/models/__init__.py b/attachment_pdfa/models/__init__.py
@@ -0,0 +1,3 @@
+from . import attachment_pdfa_mixin
+from . import res_config_settings
+from . import ir_attachment
diff --git a/attachment_pdfa/models/attachment_pdfa_mixin.py b/attachment_pdfa/models/attachment_pdfa_mixin.py
@@ -0,0 +1,16 @@
+# Copyright 2026 ACSONE SA/NV
+# License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl).
+
+from odoo import models
+
+
+class AttachmentPdfaMixin(models.AbstractModel):
+    _name = "attachment.pdfa.mixin"
+    _description = "Attachment PDF/A Mixin"
+
+    def _attachment_must_be_pdfa(self, attachment):
+        """Determine whether an attachment requires PDF/A conversion.
+
+        :param attachment: ir.attachment record
+        """
+        return False