Phase 3 of the accounts/controller refactor. Adds PurchaseInvoiceGLComposer;
PI's get_gl_entries body moves into compose() and the method becomes a thin
shim. Row-builder methods still live on the document (invoked via self.doc)
and migrate onto the composer next.
After comparing the SI and PI compose() flows, BaseGLComposer is kept minimal:
the two differ in step order, builders, and per-doctype regional function, so a
shared template is not warranted. No behavior change (Phase 0 snapshots and PI
GL tests stay green).
Relocates all 11 Sales Invoice-specific GL entry builders from the document
onto SalesInvoiceGLComposer, operating on self.doc. The perpetual-inventory
super().get_gl_entries() call becomes super(SalesInvoice, doc).get_gl_entries().
Shared bucket-A helpers (get_gl_dict, make_discount_gl_entries, etc.) remain on
AccountsController for now, invoked via self.doc, until all doctypes use a
composer. No behavior change: Phase 0 snapshots and the SI tests covering
perpetual inventory, POS, write-off, returns, fixed assets, internal transfer
and loyalty all stay green.
Phase 1 of the accounts/controller refactor. Moves the six pure
list-level validators (validate_disabled_accounts, validate_accounting_period,
validate_cwip_accounts, check_freezing_date, validate_against_pcv,
validate_allowed_dimensions) out of general_ledger.py into the new
erpnext/accounts/services/gl_validator.py. general_ledger.py imports and
calls them at the existing sites; no behavior change (Phase 0 GL snapshots
remain byte-identical).
The debit/credit balance trio stays in general_ledger.py for now since
get_debit_credit_difference mutates entries and is interleaved with the
round-off repair.
Phased plan to decompose accounts_controller.py and the sales_invoice.py
monolith into composed services. Documents the frozen GL-layer design
(GLComposer / gl_validator / general_ledger sink), method bucketing, and
the 8-phase rollout.
