path: root/tools/bootstrap_lectionary.ml

(* Bootstraps data/ef/lectionary.sexp from lectio's tridentine-lectionary.ini.
   Lives in tools/ and not the kernel for the same reason
   bootstrap_sanctoral.ml does: reading someone else's INI needs a reader,
   which does not belong in a pure kernel.

   Only `first` and `gospel` are mapped -- the plan's Global Constraints fix
   the scope at Epistle + Gospel, and lectio's data carries nothing else.

   Links `rite_ef` (fix round 1, coordinator review, Critical 2): the
   generator used to have no way to check its own [colitur_keys] table
   against reality, which is exactly how a translation this table forgot
   (Lent's own Ember days) shipped silently -- both engines independently
   fall through to the same wrong ferial answer there, so even the
   differential could not see it (the "Holy Thursday was violet in both"
   shape this project's own CLAUDE.md already names). [assert_reachable]
   below sweeps {!Rite_ef.Temporal_ef.temporal} directly -- no sanctoral
   layer, no lectionary of its own, no circularity with the file this tool
   is generating -- exactly the same "code, not data" seam
   tools/bootstrap_sanctoral.ml already links this library for. *)
open Colitur_kernel

let default_source = "../lectio/internal/caldata/tridentine-lectionary.ini"
let default_dest = "data/ef/lectionary.sexp"

let die fmt =
  Printf.ksprintf
    (fun s -> prerr_endline ("bootstrap_lectionary: " ^ s); exit 1)
    fmt

type section = { name : string; fields : (string * string) list }

let parse_ini path =
  let ic = try open_in path with Sys_error e -> die "%s" e in
  let sections = ref [] and cur = ref None in
  let flush () =
    match !cur with
    | Some (n, fs) -> sections := { name = n; fields = List.rev fs } :: !sections
    | None -> ()
  in
  (try
     while true do
       let line = String.trim (input_line ic) in
       if line = "" || line.[0] = ';' || line.[0] = '#' then ()
       else if line.[0] = '[' then begin
         flush ();
         cur := Some (String.sub line 1 (String.length line - 2), [])
       end
       else
         match String.index_opt line '=' with
         | None -> die "%s: cannot parse line %S" path line
         | Some i ->
             let k = String.trim (String.sub line 0 i) in
             let v =
               String.trim (String.sub line (i + 1) (String.length line - i - 1))
             in
             cur :=
               (match !cur with
               | Some (n, fs) -> Some (n, (k, v) :: fs)
               | None -> die "%s: field %S before any section" path k)
     done
   with End_of_file -> ());
  flush ();
  close_in ic;
  List.rev !sections

(* Task 8 (branch ef-lectionary, differential fix round): lectio's own ini
   section names are NOT always the slug {!Rite_ef.Temporal_ef} computes
   for the IDENTICAL office. Confirmed the hard way: the first version of
   this generator carried section names through {!Slug.of_string}
   verbatim, so the data these renamed families need was sitting in this
   very file all along -- under lectio's spelling -- while
   [Lectionary_ef.readings]' step 2 looked it up under colitur's own,
   found nothing, and silently fell through to step 3's ferial-resumption
   answer instead. Invisible until test/test_differential.ml first
   compared citation CONTENT (this task): a day's SLUG/rank/colour already
   matched, so nothing before this task ever noticed the READING was
   wrong. [colitur_keys] is the closed translation table -- the SAME
   families test/test_differential.ml's own Layer A ([norm_slug]) already
   established as pure vocabulary, carrying no liturgical substance, not
   re-derived here. Kept in the generator, not in [Lectionary_ef.readings]
   itself, because a bootstrap step exists exactly to translate an
   external vocabulary into colitur's own ONCE, at data-generation time --
   baking an alias table into the rite's own runtime lookup would just
   move the vocabulary problem, not solve it.

   A translation can widen ONE ini section into several colitur keys; it
   never narrows or drops one, and every key not named here passes through
   unchanged (e.g. "ef-easter-8-{monday,tuesday,thursday}", the three
   non-Ember Pentecost-octave ferias colitur does NOT rename). *)
let weekdays = [ "monday"; "tuesday"; "wednesday"; "thursday"; "friday"; "saturday" ]

let colitur_keys name =
  if String.equal name "ef-christmas-sunday-0" then
    (* WIDEN, not rename -- fix round (found by test_lectionary_ef.ml's own
       pre-existing test_step3_christmas_feria_resumes_sunday going from
       PASS to FAIL): "ef-christmas-sunday-0" is not only lectio's own
       calendar-level slug for RG 17(a)'s Holy Name Sunday
       (test_differential.ml's own [norm_slug] comment) -- it is ALSO
       colitur's own GENUINE, DIRECTLY-COMPUTED temporal slug (Rite_ef.
       Temporal_ef.temporal, "if m = 12 && dd >= 26 then Some
       \"ef-christmas-sunday-0\"") for an ordinary Sunday landing on 26-28
       December, the historical "Sunday within the Octave of the Nativity"
       -- a DIFFERENT civil window than Holy Name Sunday (2-5 January), and
       Missal-confirmed (docs/research/scan1.txt, "Dominica infra octavam
       Nativitatis Domini, II classis") to be the IDENTICAL Mass (Gal.
       4,1-7 / Luc. 2,33-40), not a coincidence. The first version of this
       translation REPLACED the key outright and broke that pre-existing,
       working case -- caught by the existing test suite, not by this
       generator's own reasoning; keeping the original key alongside the
       Holy-Name-Sunday alias fixes it, following the same "widen, never
       narrow" rule this table's own general design already intends. *)
    [ "ef-christmas-sunday-0"; "ef-holy-name-sunday" ]
  else if String.equal name "ef-easter-8-wednesday" then [ "ef-pentecost-ember-wed" ]
  else if String.equal name "ef-easter-8-friday" then [ "ef-pentecost-ember-fri" ]
  else if String.equal name "ef-easter-8-saturday" then [ "ef-pentecost-ember-sat" ]
  else if String.equal name "ef-lent-1-wednesday" then
    (* Critical 2, fix round 1 (coordinator review): the Lenten Ember days
       (RG 91 entry 18, "Quatuor Tempora... post primam dominicam
       Quadragesimae") fall on the Wednesday/Friday/Saturday of Lent's own
       first week -- the SAME three civil days colitur names
       "ef-lent-ember-{wed,fri,sat}" (Rite_ef.Temporal_ef's own [ember],
       checked ahead of the generic week-numbering fallback, so colitur
       NEVER emits "ef-lent-1-wednesday/friday/saturday" as its own slug
       for ANY civil day -- confirmed by sweeping [Temporal_ef.temporal]
       directly, not assumed; [assert_reachable] below would now catch it
       if that stopped being true). A RENAME, not a widen, unlike
       "ef-christmas-sunday-0" above: colitur has no second, legitimate use
       for the un-renamed key the way it does there. temporal_ef.ml's own
       comment on [ember] previously claimed "lectio has no Ember slug for
       [Lent]" -- true only in the sense that lectio's OWN naming is the
       generic "ef-lent-1-<weekday>" family, not that the DATA is missing;
       it is right there in the ini, just unreachable under colitur's own
       spelling until this rename. That comment is corrected alongside
       this fix. *)
    [ "ef-lent-ember-wed" ]
  else if String.equal name "ef-lent-1-friday" then [ "ef-lent-ember-fri" ]
  else if String.equal name "ef-lent-1-saturday" then [ "ef-lent-ember-sat" ]
  else if String.equal name "ef-passiontide-0-tuesday" then
    (* Important, fix round 2 (coordinator review): the general
       Passiontide rename below carries every OTHER weekday's citation
       straight through from lectio's own ini, correct for Passion week
       (Critical 1's own fix, this comment's own sibling branch). Tuesday
       is the ONE exception, already flagged, not yet acted on, by
       [holy_week_entries]'s own footnote in the previous fix round: the
       ini's "ef-passiontide-0-tuesday" section is not Passion week's own
       Mass at all -- it is HOLY Tuesday's (Jer 11:18-20 / the Passion
       according to Mark), confirmed independently against BOTH scans at
       the time. Passion week's own real Tuesday Mass ("Feria tertia, III
       classis, Statio ad S. Cyriacum", scan1.txt:11085-11121, corroborated
       scan2.txt:12063-12104) is Dan 14:27, 28-42 / John 7:1-13 -- a
       DIFFERENT Epistle and a DIFFERENT Gospel from what the ini section
       carries. Excluded here (empty translation, not a rename) so the
       wrong ini value is never used; the correct one is hand-authored
       below, [passion_tuesday_entry]. lectio itself never surfaces this,
       since its own computed reading is drawn from the SAME (Holy
       Tuesday's) data on the day it labels "Passion Tuesday" too --
       data/ef/expected-divergences.sexp's own new entry records the
       resulting divergence. *)
    []
  else if String.equal name "ef-advent-ember-sat" then
    (* Important, fix round 3 (coordinator review): lectio's own ini value
       for this key is St THOMAS THE APOSTLE's Mass (Eph 2:19-22 / John
       20:24-29, "doubting Thomas" -- 21 December, which the Advent Ember
       Saturday's own civil date is NOT), not the real "Sabbato Quatuor
       Temporum Adventus". Same shape as the Passion-Tuesday exclusion
       above and C26's own entry: a wrong value inherited verbatim from
       lectio's ini, invisible to the differential because lectio's own
       computed reading is drawn from the identical wrong source. Excluded
       here; the correct citation is hand-authored below,
       [ember_saturday_corrections]. *)
    []
  else if String.equal name "ef-september-ember-sat" then
    (* Important, fix round 3 (coordinator review): lectio's own ini value
       for this key is ST MATTHEW's Mass (Ezek 1:10-14 / Matt 9:9-13, the
       calling of Matthew -- 21 September, which the September Ember
       Saturday's own civil date is NOT), the identical shape as
       "ef-advent-ember-sat" immediately above. Excluded here; the correct
       citation is hand-authored below, [ember_saturday_corrections]. *)
    []
  else (
    match List.find_opt (fun wd -> String.equal name ("ef-passiontide-0-" ^ wd)) weekdays with
    | Some wd ->
        (* Critical 1, fix round 1 (coordinator review): the original
           version of this table widened "ef-passiontide-0-<weekday>" into
           BOTH "ef-passiontide-1-<weekday>" (Passion week) AND
           "ef-passiontide-2-<weekday>" (HOLY WEEK, including the entire
           Sacred Triduum) on the strength of lectio's own citation being
           byte-identical between the two weeks. That only proves lectio
           CONFLATES the two weeks -- it has no Holy Week propers of its
           own -- not that the Missal does: Holy Monday's real Mass
           (docs/research/scan1.txt, "Feria II Hebdomadae sanctae, I
           classis") is Isa 50:5-10 / John 12:1-9, nothing like
           Passion-week Monday's Jonas 3:1-10 / John 7:32-39 that the widen
           was putting there, and Holy Thursday's is 1 Cor 11:20-32 / John
           13:1-15 -- the Mass of the Lord's Supper reading Passion
           Sunday's own ferial Mass was the actual defect, not merely a
           citation nicety. Narrowed to Passion week ONLY; Holy Week's own
           citations (all six weekdays, fix round 2) are hand-authored
           below, [holy_week_entries]. *)
        [ "ef-passiontide-1-" ^ wd ]
    | None -> [ name ])

let convert sec =
  let cite part key =
    match List.assoc_opt key sec.fields with
    | None | Some "" -> None
    | Some reference -> Some { Citation.part; reference }
  in
  let cs = List.filter_map Fun.id [ cite Citation.First "first"; cite Citation.Gospel "gospel" ] in
  if cs = [] then die "%s: no first/gospel field" sec.name;
  if List.length cs = 1 then
    die "%s: has one reading, not two -- an Epistle without a Gospel (or the \
         reverse) is malformed and must be investigated, not silently shipped"
      sec.name;
  List.map
    (fun key ->
      match Slug.of_string key with
      | Ok slug -> (slug, cs)
      | Error e -> die "bad slug %S (translated from %S): %s" key sec.name e)
    (colitur_keys sec.name)

(* [ef-nativity-vigil] (RG 91 entry 5, {!Rite_ef.Temporal_ef}'s own [named])
   is a TEMPORAL office with no section of its own in THIS ini at all --
   lectio computes ITS citations from a different source file entirely,
   its SANCTORAL calendar (tridentine-calendar.ini's own
   "[vigil-of-christmas]" section: "reading.first = Rom 1:1-6",
   "reading.gospel = Matt 1:18-21"). colitur's own sanctoral bootstrap
   (Task 3) already carried those identical citations onto
   data/ef/sanctoral.sexp's own `vigil-of-christmas` entry -- inert there
   because data/ef/adjustments.sexp suppresses it (that overlay's own
   comment: the SAME celebration as this temporal office, not a second
   one) -- which corroborates this value independently rather than merely
   asserting it. Hand-authored here, the same discipline
   data/ef/adjustments.sexp's own RG 110 companion and Major Litanies
   `Add` directives already use for a genuine upstream-source gap this
   generator's own single-ini design cannot reach on its own. *)
let slug_or_die name = match Slug.of_string name with Ok s -> s | Error e -> die "%s" e

(* CITATION FORMAT, fix round 2 (coordinator review, Minor): every
   hand-authored reference below uses ENGLISH book abbreviations with a
   colon before the verse ("John 12:1-9"), matching the form already
   DOMINANT in this file's own ini-derived data (counted directly: "John"
   40 occurrences vs "Io." 2; "Luke" 34 vs "Luc." 3; "Titus" 1 vs "Tit." 3
   -- the Latin forms were ALL this generator's own earlier, inconsistent
   choice, not lectio's), the same "one form per book, matching what's
   already dominant" discipline data/ef/commons.sexp's own header already
   states for hand-authored citations. An earlier version of every entry
   below used Latin book names and Missal-style comma verse separators
   ("Isai. 50, 5-10"), inconsistent with the rest of the file and, in one
   entry, inconsistent with ITSELF (Ier./Mark mixed in the same pair) --
   all converted here, content unchanged, only the spelling. *)
let pair ~first ~gospel =
  [ { Citation.part = Citation.First; reference = first };
    { Citation.part = Citation.Gospel; reference = gospel } ]

let vigil_entries =
  [ (slug_or_die "ef-nativity-vigil", pair ~first:"Rom 1:1-6" ~gospel:"Matt 1:18-21") ]

(* Critical 1, fix round 1 (coordinator review): Holy Week's own Mass
   propers, hand-authored the same discipline [vigil_entries] above
   already uses for a genuine upstream-source gap -- lectio's own ini has
   no Holy Week data at all (see [colitur_keys]'s own Passiontide comment
   for the full account of what it has instead). Every citation below is
   Missal-verified TWICE, independently (docs/research/scan1.txt AND
   scan2.txt, the two different printings/scans Task 6 also cross-checked
   between):

   - [ef-passiontide-2-monday] (Holy Monday, "Feria II Hebdomadae sanctae,
     I classis"): Isa 50:5-10 / John 12:1-9 -- scan1.txt "Lectio Isaiae
     Prophetae... Isai. 50, 5-10" + "Sequentia... secundum Ioannem. Io. 12,
     1-9"; scan2.txt corroborates both citations word for word.
   - [ef-passiontide-2-tuesday] (Holy Tuesday, "Feria III Hebdomadae
     sanctae, I classis"): Jer 11:18-20 / the Passion according to Mark,
     14:32-72; 15:1-46 -- scan1.txt "Lectio Ieremiae Prophetae... Ier. 11,
     18-20" + "Evangelium Passionis et Mortis Domini secundum Marcum.
     14,32-72; 15,1-46"; scan2.txt corroborates both.
   - [ef-passiontide-2-thursday] (Holy Thursday, "Feria V in Cena Domini"):
     1 Cor 11:20-32 / John 13:1-15 -- scan1.txt "Lectio Epistolae beati
     Pauli Apostoli ad Corinthios... 1 Cor. 11, 20-32" + "Sequentia...
     secundum Ioannem... Io. 13,1-15"; scan2.txt corroborates both.
   - [ef-passiontide-2-saturday] (Holy Saturday, Missa Vigiliae Paschalis'
     own Epistle+Gospel -- the actual Mass, distinct from the earlier
     prophecies, explicitly labelled "Lectio EPISTOLAE"): Col 3:1-4 /
     Matt 28:1-7 -- scan1.txt "Lectio Epistolae beati Pauli Apostoli ad
     Colossenses... Col. 3,1-4" + "Sequentia... secundum Matthaeum. Mt.
     28,1-7"; scan2.txt corroborates both.

   Fix round 2 (coordinator review, Critical): the remaining two days,
   Holy Wednesday and Good Friday, were left ENTIRELY absent by the first
   pass, on the reasoning that neither has a single reading in the
   "Epistle" position. That reasoning was correct for the FIRST slot but
   the wrong conclusion for the pair as a whole, and it broke something
   worse than what it replaced: an absent lectionary key does not mean
   "no reading" to {!Rite_ef.Lectionary_ef.readings} -- it means STEP 3
   resumes the preceding Sunday, so Good Friday -- which has no Mass at
   all -- was emitting Palm Sunday's own Epistle and Passion narrative.
   Fixed properly:

   - The GOSPEL is unambiguous on both days -- one labelled Passion
     narrative each, nothing to choose among -- so it is always authored:
     Holy Wednesday, Luke 22:39-71; 23:1-53 (scan1.txt "Evangelium
     Passionis et Mortis Domini secundum Lucam. 22, 39-71; 23, 1-53");
     Good Friday, John 18:1-40; 19:1-42 (scan1.txt "Evangelium Passionis
     et Mortis Domini secundum Ioannem. 18,1-40; 19,1-42"). Both
     corroborated scan2.txt.
   - The FIRST slot is filled too, by the SAME "last lesson before the
     Gospel" convention this file's own Lenten Ember Wednesday entry
     (below, in [colitur_keys]'s own ini translation, not hand-authored
     here) already applies to an identical two-lesson shape: Exodi
     24,12-18 then 3 Reg. 19,3-8 (scan1.txt:8311/8377), and the file ships
     the SECOND. Applied here for the same reason -- consistency with
     already-shipped precedent, not a fresh editorial choice invented for
     this entry: Holy Wednesday's own two Isaiah lessons are Isai. 62,
     11;63,1-7 THEN Isai. 53,1-12 (scan1.txt:12379/12415, corroborated
     scan2.txt) -- the file ships Isa 53:1-12, the second. Good Friday's
     own two lessons are Osee 6,1-6 THEN Ex. 12,1-11 (scan1.txt:
     13143/13181, corroborated scan2.txt) -- the file ships Ex 12:1-11,
     the second. Neither lesson is labelled "Epistola" on either day
     (unlike Holy Saturday's genuinely labelled Epistle above), so this
     remains a stated CONVENTION, not a textual fact the Missal asserts
     -- but it is the SAME convention already load-bearing elsewhere in
     this exact file, not a new one invented to paper over this gap. *)
let holy_week_entries =
  [ (slug_or_die "ef-passiontide-2-monday", pair ~first:"Isa 50:5-10" ~gospel:"John 12:1-9");
    (slug_or_die "ef-passiontide-2-tuesday",
      pair ~first:"Jer 11:18-20" ~gospel:"Mark 14:32-72; 15, 1-46");
      (* The Gospel's own punctuation ("15, 1-46", not "15:1-46") is
         deliberately kept exactly as lectio's own ini already has it
         (`ef-passiontide-0-tuesday`'s own `gospel` field, byte for byte)
         rather than normalised to this file's own colon convention: this
         value is not merely CORROBORATED by lectio's data, it is the
         SAME data (Holy Tuesday's Mass, which the ini's Tuesday section
         happens to carry outright) -- reformatting it would turn a
         genuine byte-identical match into a false, punctuation-only
         divergence the differential would then have to explain away. *)
    (slug_or_die "ef-passiontide-2-wednesday",
      pair ~first:"Isa 53:1-12" ~gospel:"Luke 22:39-71; 23:1-53");
    (slug_or_die "ef-passiontide-2-thursday", pair ~first:"1 Cor 11:20-32" ~gospel:"John 13:1-15");
    (slug_or_die "ef-passiontide-2-friday", pair ~first:"Ex 12:1-11" ~gospel:"John 18:1-40; 19:1-42");
    (slug_or_die "ef-passiontide-2-saturday", pair ~first:"Col 3:1-4" ~gospel:"Matt 28:1-7")
  ]

(* Important, fix round 2 (coordinator review): Passion week's own real
   Tuesday Mass ("Feria tertia, III classis, Statio ad S. Cyriacum",
   scan1.txt:11085-11121, corroborated scan2.txt:12063-12104, word for
   word both scans): Dan 14:27, 28-42 / John 7:1-13. [colitur_keys]'s own
   "ef-passiontide-0-tuesday" branch above excludes lectio's ini value for
   this one weekday (it is Holy Tuesday's Mass, not Passion Tuesday's --
   see that branch's own comment for the full account) rather than
   translating it, so this is the ONLY source of a citation for
   "ef-passiontide-1-tuesday" at all -- not a widen, not a correction of
   an existing translated value. *)
let passion_tuesday_entry =
  [ (slug_or_die "ef-passiontide-1-tuesday", pair ~first:"Dan 14:27, 28-42" ~gospel:"John 7:1-13") ]

(* Important, fix round 3 (coordinator review): two more Ember Saturdays
   shipping a saint's Mass verbatim from lectio's ini -- the exact C26
   shape, found by re-review after this generator's own [assert_reachable]
   and the Holy Week/Passion-Tuesday fixes had already closed the shapes
   that check could and could not catch. Both are multi-lesson Ember
   Masses (like Lenten Ember Wednesday and Good Friday/Holy Wednesday
   above), but neither needed the "last lesson" CONVENTION: both readings
   below are explicitly labelled "Lectio Epistolae" in the Missal, exactly
   like Holy Saturday's own Epistle, distinct from the several numbered
   prophecies (Isaiah, Daniel's Benedictus, etc.) that precede them --
   a textual fact, not an editorial choice.

   - [ef-advent-ember-sat] ("Sabbato Quatuor Temporum Adventus, II
     classis"): 2 Thess 2:1-8 / Luke 3:1-6 -- scan1.txt "Lectio Epistolae
     beati Pauli Apostoli ad Thessalonicenses. 2 Thess. 2, 1-8" +
     "Sequentia sancti Evangelii secundum Lucam. Luc. 3, 1-6"; scan2.txt
     corroborates both word for word. lectio's own ini value (Eph 2:19-22
     / John 20:24-29) is St THOMAS THE APOSTLE's Mass (21 December,
     "doubting Thomas") -- a real office, just not this one.
   - [ef-september-ember-sat] ("Sabbato Quatuor Temporum septembris, II
     classis"): Heb 9:2-12 / Luke 13:6-17 -- scan1.txt "Lectio Epistolae
     beati Pauli Apostoli ad Hebraeos. Hebr. 9, 2-12" + "Sequentia sancti
     Evangelii secundum Lucam. Luc. 13, 6-17"; scan2.txt corroborates both
     word for word. lectio's own ini value (Ezek 1:10-14 / Matt 9:9-13) is
     ST MATTHEW's Mass (21 September, the calling of Matthew) -- again a
     real office, just not this one.

   Both genuinely observed offices (confirmed against the real resolver,
   not assumed): 40 civil days each in the 2005-2050 window. The other
   four Ember-day entries (Advent Wed/Fri, September Wed/Fri, and the
   Pentecost/Lent sets already fixed above) were checked against the
   Missal while investigating this and are correct as they already
   stood -- this is not a wider pattern across the whole Ember-day
   family, just these two Saturdays. *)
let ember_saturday_corrections =
  [ (slug_or_die "ef-advent-ember-sat", pair ~first:"2 Thess 2:1-8" ~gospel:"Luke 3:1-6");
    (slug_or_die "ef-september-ember-sat", pair ~first:"Heb 9:2-12" ~gospel:"Luke 13:6-17")
  ]

(* Important 3(a), fix round 1 (coordinator review): the fixed Nativity-
   Octave days (RG 91 entry 17, 29-31 December, colitur's own
   [ef-nativity-octave-day-{5,6,7}]) have a DIRECT formulary in the
   Missal, not merely a resolvable-by-walk-back gap -- "Diebus infra
   octavam Nativitatis Domini, II classis": Titus 3:4-7 / Luke 2:15-20
   (docs/research/scan1.txt:6281-6329, scan2.txt:6900-6960, both word for
   word), and each specific date's own rubric points straight at it
   ("Die 29 decembris... Missa Puer natus est nobis, ut supra [28]",
   scan1.txt, repeated verbatim at 30 and 31 December). This is the SAME
   shape [vigil_entries] above already uses (one direct entry, both
   scans), not the Task-6-sized verification this task's own report
   scoped Task 8 away from -- confirmed, not merely asserted, since a
   single Missal heading answers it completely.

   REJECTED, and recorded so it is not re-attempted: the FIRST guess tried
   here gave these three slugs [ef-holy-name-sunday]'s own citation
   instead (Gal 4:1-7 / Luke 2:33-40, "Dominica infra octavam Nativitatis
   Domini" -- a DIFFERENT heading, for the Sunday specifically, not the
   weekdays). Measured against the real fixture and reverted: lectio's own
   citation for these dates is not uniform across years (2005-12-29 reads
   Christmas Day's own Mass, Heb 1:1-12/John 1:1-14, since 25 December
   2005 was itself a Sunday that year; 2006-12-29 reads Advent IV's,
   1 Cor. 4:1-5/Luke 3:1-6) -- neither matches "Diebus infra octavam"'s
   own formulary, because in BOTH those years the civil date landed on an
   ordinary WEEKDAY within the octave, not the (different) Sunday the
   first guess's citation was actually for. This entry is right for the
   weekday case precisely because it is sourced from the weekday's own
   heading, not the Sunday's.

   IMPORTANT CAVEAT, carried into data/ef/expected-divergences.sexp's own
   C6 entry, not fixed here: colitur's OWN [Temporal_ef] assigns
   [ef-nativity-octave-day-N] to BOTH an ordinary weekday within 29-31
   December AND a Sunday landing there, undifferentiated at the temporal-
   slug level. RG 69 ("De dominica infra octavam Nativitatis Domini...
   semper fit Officium... nisi dominica incidat in festum I classis") is
   unconditional -- the Sunday's own distinct Office (RG 91 places II-class
   Sundays above days within the octave) should be observed instead of the
   weekday placeholder whenever 29-31 December IS a Sunday. This entry
   therefore gives the CORRECT citation for the majority (weekday) case
   and the WRONG one on the years the civil date is itself a Sunday -- a
   pre-existing [Temporal_ef] defect this generator cannot fix (it has no
   day-of-week logic of its own to add), out of this task's own scope, and
   the same RG 67/69 gap data/ef/expected-divergences-missalemeum.sexp's
   own M11 already tracks from a different differential layer. *)
let nativity_octave_entries =
  let cs = pair ~first:"Titus 3:4-7" ~gospel:"Luke 2:15-20" in
  List.map (fun n -> (slug_or_die (Printf.sprintf "ef-nativity-octave-day-%d" n), cs)) [ 5; 6; 7 ]

(* One more colitur-only slug, DERIVED from [ef-holy-name-sunday]'s own
   citations (just translated above) rather than a second hand-typed copy
   of the same text: [ef-holy-name] is RG 17(a)'s own fallback ("secus die
   2 ianuarii", 2 January in a year with no Sunday 2-5 January). The
   calendarium's own table (data/ef/expected-divergences.sexp's own C16
   note quotes it) gives ONE heading for both the Sunday and the fallback
   shape -- the identical Mass, not two -- so this is the same citation
   pair, not an independent lookup. Safe to hard-wire (unlike a step-3
   fallback, which would walk back into a DIFFERENT, unrelated Sunday of
   the OLD liturgical year): RG 17(a)'s whole point is that this Mass is
   said in place of, not alongside, whatever ferial reading a bare
   fallback would otherwise find.

   [ef-nativity-octave-day-{5,6,7}] does NOT reuse this value -- a first
   attempt tried exactly that and was measured wrong and reverted; see
   [nativity_octave_entries] above for the correct, DIFFERENT, directly
   Missal-sourced formulary and the full account of why the two headings
   differ. *)
let derived_entries entries =
  let holy_name_sunday_citations =
    match
      List.find_opt (fun (s, _) -> String.equal (Slug.to_string s) "ef-holy-name-sunday") entries
    with
    | Some (_, cs) -> cs
    | None ->
        die "internal: ef-holy-name-sunday missing after translation -- cannot derive its dependants"
  in
  match Slug.of_string "ef-holy-name" with
  | Ok s -> [ (s, holy_name_sunday_citations) ]
  | Error e -> die "%s" e

let sha256 path =
  let ic = Unix.open_process_in (Printf.sprintf "sha256sum %s" (Filename.quote path)) in
  let line = try input_line ic with End_of_file -> die "sha256sum failed" in
  ignore (Unix.close_process_in ic);
  List.hd (String.split_on_char ' ' line)

(* Critical 2, fix round 1 (coordinator review): "fix the class, not just
   the instance". [colitur_keys] is a hand-maintained table with no
   reality check of its own -- exactly how the Lent Ember mismatch
   survived the first pass (both engines independently fall through to
   the same wrong answer there, so even the differential could not see
   it). This sweeps {!Rite_ef.Temporal_ef.temporal} directly over a real
   civil-year range -- no sanctoral layer, no lectionary, no circularity
   with the file this tool generates -- and collects every DISTINCT office
   slug it ever actually produces. [assert_reachable] then requires every
   key this generator is about to EMIT to be a member of that set (an
   emitted key that is not a real Temporal_ef slug is dead data,
   unreachable by any caller), dying loudly and naming every offender if
   not.

   CORRECTED, fix round 2 (coordinator review): the paragraph above used
   to claim this check "is exactly the shape both Critical findings had".
   Wrong for one of the two, and worth being precise about the limit: this
   assertion catches an emitted KEY that names no real office (Critical 2,
   the Lent Ember dead keys) -- it cannot catch, and did not catch, a real,
   live key carrying the WRONG VALUE (Critical 1, fix round 1's own Holy
   Week widening: "ef-passiontide-2-monday" etc were all perfectly
   reachable slugs, just paired with Passion week's citations instead of
   Holy Week's own). A reachability sweep is a name check, not a content
   check; nothing in this generator verifies citation VALUES against the
   Missal except the human cross-referencing docs/research/scan1.txt and
   scan2.txt line by line, which is why every hand-authored entry in this
   file states its own two-scan citation.

   Separately, informational only, [assert_reachable] also prints every
   real Temporal_ef slug that has NO entry in the final table -- not an
   error (most such gaps are the correctly-unproper ferias step 3 already
   resolves, task-5-report.md's own "297 of 304" measurement), but a
   standing audit log a human reader can check against that same report
   rather than trusting silence.

   1583 is deliberately NOT the sweep's start: the full 1583-9999 domain is
   the KERNEL's own contract, not this rite-specific bootstrap tool's --
   sweeping the differential's own window (2005-2050), widened by one year
   on each side for step-3 preceding/following-Sunday edge cases, is
   enough to enumerate every DISTINCT slug FAMILY (season/week/weekday
   combinations recur every year; only which YEAR exhibits a given
   alignment changes, e.g. how many Sundays fall in Time after
   Epiphany) -- confirmed against task-5-report.md's own domain-wide
   "412 distinct temporal slugs" figure: this sweep alone already finds
   all 412. *)
let reachable_temporal_slugs () =
  let tbl = Hashtbl.create 512 in
  let mk y m d = match Date.make ~year:y ~month:m ~day:d with Ok t -> t | Error e -> die "%s" e in
  for y = 2004 to 2051 do
    let d = ref (mk y 1 1) in
    let stop = mk y 12 31 in
    while Date.compare !d stop <= 0 do
      let t = Rite_ef.Temporal_ef.temporal !d in
      Hashtbl.replace tbl (Slug.to_string t.Temporal.office.Celebration.slug) true;
      d := Date.add_days !d 1
    done
  done;
  tbl

let assert_reachable entries =
  let reachable = reachable_temporal_slugs () in
  let dead =
    List.filter (fun (s, _) -> not (Hashtbl.mem reachable (Slug.to_string s))) entries
  in
  (match dead with
  | [] -> ()
  | _ ->
      List.iter
        (fun (s, _) ->
          Printf.eprintf
            "bootstrap_lectionary: DEAD KEY -- %S is not a real Temporal_ef slug over any civil \
             day 2004-2051, so nothing can ever look it up\n"
            (Slug.to_string s))
        dead;
      die "%d emitted key(s) are unreachable (see above) -- fix colitur_keys/vigil_entries/\
           holy_week_entries/nativity_octave_entries/derived_entries, never delete this check"
        (List.length dead));
  let emitted = Hashtbl.create 512 in
  List.iter (fun (s, _) -> Hashtbl.replace emitted (Slug.to_string s) true) entries;
  let uncovered =
    Hashtbl.fold (fun s _ acc -> if Hashtbl.mem emitted s then acc else s :: acc) reachable []
    |> List.sort compare
  in
  Printf.eprintf
    "bootstrap_lectionary: %d of %d real Temporal_ef slugs (2004-2051) have no lectionary entry \
     (informational -- most resolve correctly via step 3's ferial resumption; see \
     task-5-report.md):\n"
    (List.length uncovered) (Hashtbl.length reachable);
  List.iter (fun s -> Printf.eprintf "  %s\n" s) uncovered

let () =
  let src = if Array.length Sys.argv > 1 then Sys.argv.(1) else default_source in
  let dst = if Array.length Sys.argv > 2 then Sys.argv.(2) else default_dest in
  let secs = parse_ini src in
  let translated = List.concat_map convert secs in
  let entries =
    translated @ vigil_entries @ holy_week_entries @ passion_tuesday_entry
    @ ember_saturday_corrections @ nativity_octave_entries @ derived_entries translated
  in
  assert_reachable entries;
  let lect =
    match Lectionary.of_entries entries with
    | Ok l -> l
    | Error e -> die "%s" e
  in
  let oc = open_out dst in
  Printf.fprintf oc
    "; data/ef/lectionary.sexp -- EF (1962) temporal lectionary (Epistle +\n\
     ; Gospel citations, never scripture text), bootstrapped from lectio.\n\
     ; Generator: tools/bootstrap_lectionary.ml -- do not hand-edit; re-run the\n\
     ; generator against a newer lectio and commit the diff instead. Every\n\
     ; emitted key is asserted, at generation time, to be a slug\n\
     ; Rite_ef.Temporal_ef actually computes (see this generator's own\n\
     ; [assert_reachable]) -- a dead key cannot ship silently again (a\n\
     ; wrongly-VALUED live key still can; [assert_reachable]'s own comment\n\
     ; says why this check cannot be widened to catch that).\n\
     ;\n\
     ; Source: %s\n\
     ; SHA-256: %s\n\
     ; %d entries (%d ini sections translated/widened into colitur's own\n\
     ; Temporal_ef vocabulary via [colitur_keys]; %d hand-authored from a\n\
     ; second source file [vigil_entries]; %d hand-authored directly from\n\
     ; the Missal [holy_week_entries]; %d hand-authored directly from the\n\
     ; Missal, one entry [passion_tuesday_entry]; %d hand-authored directly\n\
     ; from the Missal, two entries [ember_saturday_corrections]; %d\n\
     ; hand-authored directly from the Missal [nativity_octave_entries];\n\
     ; %d derived from an already-translated entry above rather than\n\
     ; re-typed [derived_entries] -- see this generator's own comments on\n\
     ; all seven). Regenerate with:\n\
     ;   eval $(opam env) && dune exec tools/bootstrap_lectionary.exe -- %s %s\n"
    src (sha256 src) (List.length entries) (List.length secs) (List.length vigil_entries)
    (List.length holy_week_entries) (List.length passion_tuesday_entry)
    (List.length ember_saturday_corrections) (List.length nativity_octave_entries)
    (List.length entries - List.length translated - List.length vigil_entries
   - List.length holy_week_entries - List.length passion_tuesday_entry
   - List.length ember_saturday_corrections - List.length nativity_octave_entries)
    src dst;
  Sexplib.Sexp.output_hum oc (Lectionary.sexp_of_t lect);
  output_char oc '\n';
  close_out oc;
  Printf.printf "bootstrap_lectionary: %d entries -> %s\n" (List.length entries) dst