Add DETAILS_PAGE setting to make per-photo details pages optional

Album owners can now set DETAILS_PAGE=no (or pass --no-details) to skip
generating each photo's *-details.html EXIF summary page and its "Details"
navigation redirects, without touching the normal thumbnail overview,
per-photo view pages, EXIF tooltips, or STATS_PAGE, which all stay
independently controlled. Every "Details" link (on view pages and stats
filter mini-album view pages) and every "-details" redirect stub is gated
on the setting so no generated page ever links to a file that was not
rendered. Wired the new field through CONFIG_SPECS (registry-driven
defaults/validation/print-config/CLI override), the --details/--no-details
CLI flags, usage() help, the verbose effective-config log, shuriken.json
generation metadata, and the dry-run plan. DETAILS_PAGE=yes (the default)
keeps prior output byte-for-byte identical.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

11 files changed, 160 insertions, 50 deletions

diff --git a/src/lib/action.source.sh b/src/lib/action.source.sh
index b0460f0..cbc928e 100644
--- a/src/lib/action.source.sh
+++ b/src/lib/action.source.sh
@@ -177,6 +177,7 @@ log_configured_action() {
     log_verbose "Effective ImageMagick timeout: ${IMAGEMAGICK_TIMEOUT}s"
     log_verbose "Effective tar timeout: ${TAR_TIMEOUT}s"
     log_verbose "Effective splash page setting: $SPLASH_PAGE"
+    log_verbose "Effective details page setting: $DETAILS_PAGE"
     log_verbose "Effective stats page setting: $STATS_PAGE"
     log_verbose "Effective tarball setting: $TARBALL_INCLUDE"
     log_verbose "Effective sync delete setting: $SYNC_DELETE"
diff --git a/src/lib/album-render.source.sh b/src/lib/album-render.source.sh
index 7cfff0c..a6012bb 100644
--- a/src/lib/album-render.source.sh
+++ b/src/lib/album-render.source.sh
@@ -223,6 +223,10 @@ render_view_page() {
         tarball_name "$tarball_name"
 }
 
+# Render one photo's *-details.html page. Only called by
+# render_photo_view_and_details when DETAILS_PAGE=yes; callers must not invoke
+# this directly for a photo when details are disabled, or a dangling file would
+# be produced with no page linking to it.
 render_details_page() {
     local -r html_dir="$1"; shift
     local -r photos_dir="$1"; shift
@@ -285,15 +289,22 @@ render_photo_view_and_details() {
         "$page_num" \
         "$preview_num" \
         "$photo"
-    render_details_page \
-        "$html_dir" \
-        "$photos_dir" \
-        "$blurs_dir" \
-        "$backhref" \
-        "$tarball_name" \
-        "$page_num" \
-        "$preview_num" \
-        "$photo"
+
+    # DETAILS_PAGE=no skips the *-details.html file entirely (view.tmpl's Details
+    # link is likewise suppressed via render_details_page_html, so nothing links
+    # to it). This is the only place a photo's details page would be rendered, so
+    # skipping the call here is sufficient to omit the file for every photo.
+    if [ "$DETAILS_PAGE" = yes ]; then
+        render_details_page \
+            "$html_dir" \
+            "$photos_dir" \
+            "$blurs_dir" \
+            "$backhref" \
+            "$tarball_name" \
+            "$page_num" \
+            "$preview_num" \
+            "$photo"
+    fi
 }
 
 record_rendered_view_page() {
@@ -310,32 +321,78 @@ record_rendered_view_page() {
     last_views_ref["$page"]="$preview"
 }
 
-# Navigation-redirect count single source of truth (task nr0). Every view page
-# gets ALBUM_REDIRECTS_PER_PAGE wrap-around redirect files: the prev stub
-# (N-0.html) and its details twin, plus the next stub (N-(last+1).html) and its
-# details twin -- four files, emitted by render_page_view_redirects below for
-# every page. The LAST page additionally emits ALBUM_REDIRECTS_LAST_PAGE_EXTRA
-# files: the 0-MAXPREVIEWS / 0-MAXPREVIEWS-details entry stubs that bounce into
-# the album. Keep these two numbers in lockstep with render_page_view_redirects;
-# the dry-run plan predicts redirect_count from them via
-# album_redirect_count_for_page_count instead of a magic "*4+2".
-declare -gri ALBUM_REDIRECTS_PER_PAGE=4
-declare -gri ALBUM_REDIRECTS_LAST_PAGE_EXTRA=2
+# Navigation-redirect count single source of truth (task nr0; extended for
+# DETAILS_PAGE by task 6v0). Every view page gets ALBUM_VIEW_REDIRECTS_PER_PAGE
+# wrap-around redirect files: the prev stub (N-0.html) and the next stub
+# (N-(last+1).html). When DETAILS_PAGE=yes, each of those also gets a
+# "-details" twin, adding ALBUM_DETAILS_REDIRECTS_PER_PAGE more -- so
+# render_page_view_redirects emits 2 files per page with details disabled, 4
+# with them enabled. The LAST page additionally emits
+# ALBUM_VIEW_REDIRECTS_LAST_PAGE_EXTRA entry stubs (plus their details twins
+# when enabled): the 0-MAXPREVIEWS / loop-to-1 stubs that bounce into the
+# album. Keep these numbers in lockstep with render_page_view_redirects; the
+# dry-run plan predicts redirect_count from them via
+# album_redirect_count_for_page_count instead of a magic formula.
+declare -gri ALBUM_VIEW_REDIRECTS_PER_PAGE=2
+declare -gri ALBUM_DETAILS_REDIRECTS_PER_PAGE=2
+declare -gri ALBUM_VIEW_REDIRECTS_LAST_PAGE_EXTRA=1
+declare -gri ALBUM_DETAILS_REDIRECTS_LAST_PAGE_EXTRA=1
+
+# Per-page / last-page-extra redirect file counts for the CURRENT DETAILS_PAGE
+# setting: the view-only counts, plus the details counts when DETAILS_PAGE=yes.
+# Split out of album_redirect_count_for_page_count so that function stays a
+# short arithmetic one-liner.
+album_redirects_per_page() {
+    local -i count=$ALBUM_VIEW_REDIRECTS_PER_PAGE
+
+    if [ "$DETAILS_PAGE" = yes ]; then
+        count+=$ALBUM_DETAILS_REDIRECTS_PER_PAGE
+    fi
+    printf '%d\n' "$count"
+}
+
+album_redirects_last_page_extra() {
+    local -i count=$ALBUM_VIEW_REDIRECTS_LAST_PAGE_EXTRA
+
+    if [ "$DETAILS_PAGE" = yes ]; then
+        count+=$ALBUM_DETAILS_REDIRECTS_LAST_PAGE_EXTRA
+    fi
+    printf '%d\n' "$count"
+}
 
 # Total navigation redirects a run produces for a given number of preview pages:
-# four per page plus the last page's extra entry stubs. Zero pages -> zero
-# redirects (render_view_redirects returns early on an empty album). This is the
-# count render_page_view_redirects actually writes across all pages, expressed
-# once so the dry-run plan cannot drift from real generation.
+# album_redirects_per_page per page plus the last page's extra entry stubs.
+# Zero pages -> zero redirects (render_view_redirects returns early on an empty
+# album). This is the count render_page_view_redirects actually writes across
+# all pages, expressed once so the dry-run plan cannot drift from real
+# generation.
 album_redirect_count_for_page_count() {
     local -ri page_count="$1"; shift
+    local -i per_page
+    local -i last_page_extra
 
     if (( page_count <= 0 )); then
         printf '0\n'
         return
     fi
-    printf '%d\n' "$(( page_count * ALBUM_REDIRECTS_PER_PAGE \
-        + ALBUM_REDIRECTS_LAST_PAGE_EXTRA ))"
+    per_page=$(album_redirects_per_page)
+    last_page_extra=$(album_redirects_last_page_extra)
+    printf '%d\n' "$(( page_count * per_page + last_page_extra ))"
+}
+
+# Render one details-redirect stub, but only when DETAILS_PAGE=yes (mirrors
+# render_photo_view_and_details skipping render_details_page entirely). A no-op
+# under DETAILS_PAGE=no keeps every "-details.html" navigation stub from ever
+# being written, so no generated page can link to a missing one.
+_render_details_redirect() {
+    local -r html_dir="$1"; shift
+    local -r filename="$1"; shift
+    local -r target="$1"; shift
+
+    if [ "$DETAILS_PAGE" != yes ]; then
+        return
+    fi
+    template redirect "$filename" html_dir "$html_dir" redirect_page "$target"
 }
 
 # Render every navigation redirect for a single view page (the prev/next
@@ -345,7 +402,7 @@ album_redirect_count_for_page_count() {
 # files for distinct pages are produced here. The wrap-around redirects for the
 # very last page (0-MAXPREVIEWS and the loop-to-1 links) are emitted as part of
 # that page's group. Per-page / last-page file counts are fixed by
-# ALBUM_REDIRECTS_PER_PAGE / ALBUM_REDIRECTS_LAST_PAGE_EXTRA above.
+# album_redirects_per_page / album_redirects_last_page_extra above.
 render_page_view_redirects() {
     local -r html_dir="$1"; shift
     local -ri page="$1"; shift
@@ -357,30 +414,26 @@ render_page_view_redirects() {
     template redirect "$prevredirect.html" \
         html_dir "$html_dir" \
         redirect_page "$(( page - 1 ))-${MAXPREVIEWS}"
-    template redirect "$prevredirect-details.html" \
-        html_dir "$html_dir" \
-        redirect_page "$(( page - 1 ))-${MAXPREVIEWS}-details"
+    _render_details_redirect "$html_dir" "$prevredirect-details.html" \
+        "$(( page - 1 ))-${MAXPREVIEWS}-details"
 
     if (( page == max_page )); then
         template redirect "0-$MAXPREVIEWS.html" \
             html_dir "$html_dir" \
             redirect_page "${page}-$lastview"
-        template redirect "0-$MAXPREVIEWS-details.html" \
-            html_dir "$html_dir" \
-            redirect_page "${page}-$lastview-details"
+        _render_details_redirect "$html_dir" "0-$MAXPREVIEWS-details.html" \
+            "${page}-$lastview-details"
         template redirect "$nextredirect.html" \
             html_dir "$html_dir" \
             redirect_page '1-1'
-        template redirect "$nextredirect-details.html" \
-            html_dir "$html_dir" \
-            redirect_page '1-1-details'
+        _render_details_redirect "$html_dir" "$nextredirect-details.html" \
+            '1-1-details'
     else
         template redirect "$nextredirect.html" \
             html_dir "$html_dir" \
             redirect_page "$(( page + 1 ))-1"
-        template redirect "$nextredirect-details.html" \
-            html_dir "$html_dir" \
-            redirect_page "$(( page + 1 ))-1-details"
+        _render_details_redirect "$html_dir" "$nextredirect-details.html" \
+            "$(( page + 1 ))-1-details"
     fi
 }
 
diff --git a/src/lib/bootstrap.source.sh b/src/lib/bootstrap.source.sh
index 66193e3..1cb40eb 100644
--- a/src/lib/bootstrap.source.sh
+++ b/src/lib/bootstrap.source.sh
@@ -34,6 +34,8 @@ usage() {
     --random-seed VALUE
     --splash
     --no-splash
+    --details
+    --no-details
     --stats
     --no-stats
     --shuffle
diff --git a/src/lib/config.spec.source.sh b/src/lib/config.spec.source.sh
index d4778a9..764cba6 100644
--- a/src/lib/config.spec.source.sh
+++ b/src/lib/config.spec.source.sh
@@ -73,6 +73,7 @@ declare -gra CONFIG_SPECS=(
     'RANDOM_SEED||yes|yes||scalar'
     'SHUFFLE|no|yes|yes|yesno|scalar'
     'SPLASH_PAGE|yes|yes|yes|yesno|scalar'
+    'DETAILS_PAGE|yes|yes|yes|yesno|scalar'
     'STATS_PAGE|no|yes|yes|yesno|scalar'
     'TARBALL_INCLUDE|yes|yes|yes|yesno|scalar'
     'TARBALL_SUFFIX|.tar|yes|no||scalar'
diff --git a/src/lib/config.validate.source.sh b/src/lib/config.validate.source.sh
index 3ca720a..345ec6d 100644
--- a/src/lib/config.validate.source.sh
+++ b/src/lib/config.validate.source.sh
@@ -113,8 +113,20 @@ validate_template_file() {
 
 validate_template_dir() {
     local template_name
-    local -a required_templates=(
-        details
+    local -a required_templates=()
+
+    validate_template_dir_access || return
+
+    # details.tmpl is only needed when DETAILS_PAGE=yes actually renders it
+    # (mirrors the SPLASH_PAGE=yes conditional below), so an album that opts out
+    # of details pages does not need to keep a details.tmpl around at all. Kept
+    # first in the list (as it always was) so the reporting order for the
+    # unconditional templates below is unchanged from before DETAILS_PAGE
+    # existed.
+    if [ "$DETAILS_PAGE" = yes ]; then
+        required_templates+=(details)
+    fi
+    required_templates+=(
         footer
         header
         next
@@ -125,8 +137,6 @@ validate_template_dir() {
         view
     )
 
-    validate_template_dir_access || return
-
     if [ "$SPLASH_PAGE" = yes ]; then
         required_templates+=(splash)
     fi
@@ -290,6 +300,7 @@ validate_common_config() {
         SYNC_TIMEOUT
         SHUFFLE
         SPLASH_PAGE
+        DETAILS_PAGE
         STATS_PAGE
         TARBALL_INCLUDE
         FAVICON
diff --git a/src/lib/dry-run.source.sh b/src/lib/dry-run.source.sh
index eaaffeb..4bdb66e 100644
--- a/src/lib/dry-run.source.sh
+++ b/src/lib/dry-run.source.sh
@@ -39,9 +39,14 @@ collect_dry_run_page_plan() {
         # files are touched here, so dry-run stays side-effect free.
         page_count=$(album_page_count_for_image_count "$image_count")
         redirect_count=$(album_redirect_count_for_page_count "$page_count")
-        plan_ref["details_count"]="$image_count"
         plan_ref["page_count"]="$page_count"
         plan_ref["redirect_count"]="$redirect_count"
+        # One details page per photo, but only when DETAILS_PAGE=yes -- mirrors
+        # render_photo_view_and_details skipping render_details_page entirely,
+        # so the plan cannot drift from what --generate actually writes.
+        if [ "$DETAILS_PAGE" = yes ]; then
+            plan_ref["details_count"]="$image_count"
+        fi
     fi
 }
 
@@ -86,6 +91,7 @@ collect_dry_run_plan() {
     plan_ref["random_seed"]="$RANDOM_SEED"
     plan_ref["shuffle"]="$SHUFFLE"
     plan_ref["splash_page"]="$SPLASH_PAGE"
+    plan_ref["details_page"]="$DETAILS_PAGE"
     plan_ref["stats_page"]="$STATS_PAGE"
     plan_ref["image_count"]="$image_count"
     plan_ref["tarball_include"]="$TARBALL_INCLUDE"
@@ -120,14 +126,17 @@ _print_dry_run_settings() {
     printf 'Random seed: %s\n' "${plan_ref["random_seed"]}"
     printf 'Shuffle: %s\n' "${plan_ref["shuffle"]}"
     printf 'Splash page: %s\n' "${plan_ref["splash_page"]}"
+    printf 'Details page: %s\n' "${plan_ref["details_page"]}"
     printf 'Stats page: %s\n' "${plan_ref["stats_page"]}"
     printf 'Image count: %s\n' "${plan_ref["image_count"]}"
     printf 'Tarball setting: %s\n' "${plan_ref["tarball_include"]}"
     printf 'Tarball name plan: %s\n' "${plan_ref["tarball_name_plan"]}"
 }
 
-# Print the planned directories and generated-files listing (index/favicon/json,
-# image dirs, page/view/details/redirect counts, optional stats + tarball lines).
+# Print the planned directories, plus the generated-files lines that are always
+# present regardless of any page toggle (index/favicon/json/image dirs/page/view
+# counts). Split from the optional-lines half below (_print_dry_run_optional_files)
+# so each stays around 30 lines, matching the generation-metadata JSON split.
 _print_dry_run_files() {
     local -r plan_name="$1"; shift
     # shellcheck disable=SC2178
@@ -159,8 +168,21 @@ _print_dry_run_files() {
         "${plan_ref["dist_dir"]}" "${plan_ref["page_count"]}"
     printf '  %s/[page]-[image].html (%s view pages)\n' \
         "${plan_ref["dist_dir"]}" "${plan_ref["image_count"]}"
-    printf '  %s/[page]-[image]-details.html (%s details pages)\n' \
-        "${plan_ref["dist_dir"]}" "${plan_ref["details_count"]}"
+}
+
+# Print the generated-files lines gated behind a page toggle (details, the
+# navigation redirect count that itself depends on DETAILS_PAGE, stats, and the
+# tarball). Split out of _print_dry_run_files (see its comment) purely to keep
+# both halves short; output is unchanged from the previous single function.
+_print_dry_run_optional_files() {
+    local -r plan_name="$1"; shift
+    # shellcheck disable=SC2178
+    local -n plan_ref="$plan_name"
+
+    if [ "${plan_ref["details_page"]}" = yes ]; then
+        printf '  %s/[page]-[image]-details.html (%s details pages)\n' \
+            "${plan_ref["dist_dir"]}" "${plan_ref["details_count"]}"
+    fi
     printf '  %s/[redirect].html (%s navigation redirects)\n' \
         "${plan_ref["dist_dir"]}" "${plan_ref["redirect_count"]}"
     if [ "${plan_ref["stats_page"]}" = yes ]; then
@@ -184,4 +206,5 @@ print_dry_run_plan() {
 
     _print_dry_run_settings "$plan_name"
     _print_dry_run_files "$plan_name"
+    _print_dry_run_optional_files "$plan_name"
 }
diff --git a/src/lib/generation-metadata.source.sh b/src/lib/generation-metadata.source.sh
index f70bc23..20f5d09 100644
--- a/src/lib/generation-metadata.source.sh
+++ b/src/lib/generation-metadata.source.sh
@@ -44,6 +44,7 @@ _collect_generation_metadata() {
     _GENERATION_METADATA["settings_random_seed"]="$RANDOM_SEED"
     _GENERATION_METADATA["settings_shuffle"]="$SHUFFLE"
     _GENERATION_METADATA["settings_splash_page"]="$SPLASH_PAGE"
+    _GENERATION_METADATA["settings_details_page"]="$DETAILS_PAGE"
     _GENERATION_METADATA["settings_stats_page"]="$STATS_PAGE"
     _GENERATION_METADATA["settings_original_basepath"]="$ORIGINAL_BASEPATH"
 }
@@ -115,6 +116,8 @@ _generation_metadata_json_settings() {
         "$(json_bool "${_GENERATION_METADATA["settings_shuffle"]}")"
     printf '    "splash_page": %s,\n' \
         "$(json_bool "${_GENERATION_METADATA["settings_splash_page"]}")"
+    printf '    "details_page": %s,\n' \
+        "$(json_bool "${_GENERATION_METADATA["settings_details_page"]}")"
     printf '    "stats_page": %s,\n' \
         "$(json_bool "${_GENERATION_METADATA["settings_stats_page"]}")"
     printf '    "original_basepath": %s\n' \
diff --git a/src/lib/stats-filter-album.source.sh b/src/lib/stats-filter-album.source.sh
index da37886..09dffb1 100644
--- a/src/lib/stats-filter-album.source.sh
+++ b/src/lib/stats-filter-album.source.sh
@@ -22,7 +22,9 @@
 # within that filter. The "--<index>" suffix cannot collide with another gallery
 # name because a pagebase never contains "--". All pages reuse the album's shared
 # photos/thumbs/blurs assets (only the HTML differs); view pages link "Details"
-# to the album's own details page via the album_view_page_for_photo accessor.
+# to the album's own details page via the album_view_page_for_photo accessor,
+# but only when DETAILS_PAGE=yes actually rendered that page (see
+# _stats_build_filterview_body below).
 # Pages render in
 # parallel through the shared job pool, throttled to IMAGE_JOBS. The galleries
 # reuse camera.tmpl and the view pages reuse cameraview.tmpl.
@@ -165,7 +167,11 @@ _stats_build_filterview_body() {
         tooltip_attr=" title=\"$(html_escape "$tooltip")\""
     fi
     view_page=$(album_view_page_for_photo "$photo")
-    if [ -n "$view_page" ]; then
+    # Only link to the album's details page when it was actually rendered
+    # (DETAILS_PAGE=yes); otherwise album_view_page_for_photo resolving a page
+    # would still point at a details file that render_photo_view_and_details
+    # never wrote, leaving a dangling link.
+    if [ -n "$view_page" ] && [ "$DETAILS_PAGE" = yes ]; then
         details_link=$(printf \
             ' <a href="%s/%s-details.html">Details</a> <span class="nav-sep">|</span>' \
             "$backhref_html" "$view_page")
diff --git a/src/lib/template.source.sh b/src/lib/template.source.sh
index c66e955..8938a1d 100644
--- a/src/lib/template.source.sh
+++ b/src/lib/template.source.sh
@@ -240,6 +240,7 @@ declare -ra TEMPLATE_RENDER_FIELD_SPECS=(
     'render_cameraview_body_html|context_raw|cameraview_body|cameraview_body|cameraview'
     'render_camera_thumbs_html|context_raw|camera_thumbs|camera_thumbs|camera'
     'render_current_date_text|current_date_html|||header'
+    'render_details_page_html|config_html|DETAILS_PAGE||view'
     'render_enter_page_html|context_html|enter_page|enter_page|splash'
     'render_exif_details_html|context_raw|exif_details|exif_details|details'
     'render_exif_tooltip_html|context_html|exif_tooltip|exif_tooltip|details view'
diff --git a/src/shuriken.default.conf b/src/shuriken.default.conf
index eaa30a4..79413a5 100644
--- a/src/shuriken.default.conf
+++ b/src/shuriken.default.conf
@@ -25,6 +25,13 @@ IMAGEMAGICK_TIMEOUT=60
 # SHUFFLE=yes
 # Generate a splash landing page at index.html.
 SPLASH_PAGE=yes
+# Generate a per-photo *-details.html page (the EXIF details view reachable via
+# the "Details" link on each photo's view page) for every photo. Can be yes or
+# no. On by default; set to no (or pass --no-details) to skip these pages and
+# their "Details" links -- the normal thumbnail overview and per-photo view
+# pages, EXIF tooltips, and the EXIF stats site are unaffected and stay
+# independently controlled by STATS_PAGE.
+DETAILS_PAGE=yes
 # Generate an EXIF stats site (stats/ overview plus per-camera and filter
 # mini-albums) and show the Stats navigation link in page headers. Can be yes or
 # no. Off by default; set to yes (or pass --stats) to enable it.
diff --git a/src/shuriken.sh b/src/shuriken.sh
index e26bbf8..65dae43 100755
--- a/src/shuriken.sh
+++ b/src/shuriken.sh
@@ -55,6 +55,8 @@ declare -Ar CLI_OPTION_SPEC=(
     [--no-shuffle]='kind=flag value=no config=SHUFFLE'
     [--splash]='kind=flag value=yes config=SPLASH_PAGE'
     [--no-splash]='kind=flag value=no config=SPLASH_PAGE'
+    [--details]='kind=flag value=yes config=DETAILS_PAGE'
+    [--no-details]='kind=flag value=no config=DETAILS_PAGE'
     [--stats]='kind=flag value=yes config=STATS_PAGE'
     [--no-stats]='kind=flag value=no config=STATS_PAGE'
     [--tarball]='kind=flag value=yes config=TARBALL_INCLUDE'