From 32f5de42bca9bccf1c1983fa7dc168a9456479b6 Mon Sep 17 00:00:00 2001
From: tannevaled <tannevaled@users.noreply.github.com>
Date: Tue, 10 Nov 2026 16:06:17 +0100
Subject: [PATCH] landing: the mantra guards are the tool's own, not
 hand-written ones
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#75 removed the repeats by hand. ⛔ THE FLEET ALREADY HAS THE COMMAND, and I
had not run it: `landingmigrate repeats LAYOUT` — "Find (and with --write hide)
what a layout says that the mantra strip already says". On this layout as it
stood it named exactly the five fragments a reader had spotted and nothing
else:

    footer   hidden while the strip shows   · BSD-3-Clause
    footer   hidden while the strip shows   CGO_ENABLED=0 ·
    sentence hidden while the strip shows   Pure Go, CGO_ENABLED=0.
    sentence hidden while the strip shows   BSD-3-Clause.
    sentence hidden while the strip shows   Pure Go, cgo disabled, BSD-3-Clause.

So this is `landingmigrate repeats --write` run on the layout as it was before
#75, replacing the hand-written version. Two differences, both the tool's
favour:

- ⛔ IT USES `$`, NOT `.`. The detector's own idiom is
  `{{ if not (partial "mantra-on.html" $) }}` — repeats.go says why: "a
  fragment inside {{ range }} has a repository for its dot". A hand-written `.`
  renders correctly at a layout's top level AND THE DETECTOR CANNOT SEE IT, so
  a gate would go on failing on a page that is already right.
- It GUARDS the hero's tail where I had deleted it, so the sentence comes back
  if the strip is ever turned off. That is what the convention is for.

Re-running the detector now reports the same fragments as "KEPT, says more:
review" and none as hideable, which is the idempotent state.

Measured on the built page: "cgo disabled" gone, the footer reads
"Pure Go · every library builds for js/wasm".

The gate itself is one flag away and is not here: `repeats` always exits 0, so
nothing can be built on it without a shell reading its words. The design is on
go-fleettools/fleettools#234; the repository was leased to another session.

Refs go-fleettools/fleettools#234.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
---
 layouts/index.html | 16 +++-------------
 1 file changed, 3 insertions(+), 13 deletions(-)

diff --git a/layouts/index.html b/layouts/index.html
index 7e3e872..778b4e9 100644
--- a/layouts/index.html
+++ b/layouts/index.html
@@ -19,13 +19,7 @@
   <div class="hero"><div class="wrap">
     <div>
       <h1 class="head">The whole of PDF<br><span class="accent">in Go, with no C anywhere.</span></h1>
-      <p class="sub">Read a file, write one, rearrange it, draw it, read it back as words and pictures, and <b>edit it with other people</b> — in a browser tab if you like, since every one of these builds for <code>js/wasm</code>. Fonts are parsed and shaped by <a href="https://github.com/go-opentype/opentype">go-opentype</a>, pages are rasterised by <a href="https://github.com/go-gfx/gfx">go-gfx</a>.</p>
-      {{/* ⛔ THE MANTRA STRIP ABOVE ALREADY SAYS IT. This sentence ended
-           "Pure Go, CGO_ENABLED=0. BSD-3-Clause." — two chips' worth of words,
-           a screen's length below the chips themselves, and the page went on to
-           say both again twice more. landingkit has the question to ask
-           (partials/mantra-on.html) precisely so a landing says it ONLY when
-           the strip is off; this landing had never asked it. */}}
+      <p class="sub">Read a file, write one, rearrange it, draw it, read it back as words and pictures, and <b>edit it with other people</b> — in a browser tab if you like, since every one of these builds for <code>js/wasm</code>. Fonts are parsed and shaped by <a href="https://github.com/go-opentype/opentype">go-opentype</a>, pages are rasterised by <a href="https://github.com/go-gfx/gfx">go-gfx</a>. {{ if not (partial "mantra-on.html" $) }}Pure Go, <code>CGO_ENABLED=0</code>.{{ end }} {{ if not (partial "mantra-on.html" $) }}BSD-3-Clause.{{ end }}</p>
       <div class="cta">
         {{/* ⛔ DOCUMENTATION FIRST, as on go-richdoc, go-images and go-slides.
              This landing had the app first and was the odd one out; the order
@@ -160,15 +154,11 @@ <h2>A subset, an encoding, and text you can still copy.</h2>
   <section id="eco" style="padding-top:6px"><div class="wrap">
     <div class="band">
       <h2>100 % statement coverage, including the branches that report a bad file.</h2>
-      <p>And it <b>runs</b> on {{ len .Site.Params.arches }} architectures, not merely compiles for them.{{ if not (partial "mantra-on.html" .) }} Pure Go, cgo disabled, BSD-3-Clause.{{ end }}</p>
+      <p>And it <b>runs</b> on {{ len .Site.Params.arches }} architectures, not merely compiles for them. {{ if not (partial "mantra-on.html" $) }}Pure Go, cgo disabled, BSD-3-Clause.{{ end }}</p>
       <a class="btn btn-ghost" href="https://github.com/go-pdfkit">{{ partial "icons/github.html" . }}Read the source on GitHub →</a>
     </div>
   </div></section>
 
-  {{/* The idiom landingkit's mantra-on.html documents, used here as written:
-       the footer says the licence and the cgo setting only when the strip at
-       the top is not already saying them. What is left either way is the one
-       claim the strip does NOT make — that every library builds for js/wasm. */}}
-  <footer><div class="wrap"><span>© the go-pdfkit authors{{ if not (partial "mantra-on.html" .) }} · BSD-3-Clause{{ end }}</span><span>{{ if not (partial "mantra-on.html" .) }}Pure Go · CGO_ENABLED=0 · {{ end }}every library builds for js/wasm</span></div></footer>
+  <footer><div class="wrap"><span>© the go-pdfkit authors{{ if not (partial "mantra-on.html" $) }} · BSD-3-Clause{{ end }}</span><span>Pure Go · {{ if not (partial "mantra-on.html" $) }}CGO_ENABLED=0 · {{ end }}every library builds for js/wasm</span></div></footer>
 </body>
 </html>