Add configurable SOURCE_URL footer link; release 0.9.00.9.0

The footer "Site generated ... with <link>" was hardcoded to the shuriken.sh
repository. Make it configurable via the SOURCE_URL config variable and the
--source-url CLI flag (defaulting to the shuriken.sh repo, so existing sites are
unchanged). The footer derives the displayed text from the URL by stripping its
scheme. Plumbed through apply_config_defaults, CLI override targets/spec,
--print-config, the verbose effective-config log, and the header template's
new render_source_url_html (config_html) render var. Documented in
shuriken.default.conf and README; added a generation test asserting a custom
SOURCE_URL replaces the default footer link, and updated the print-config and
header render-var-subset expectations.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

4 files changed, 12 insertions, 0 deletions

diff --git a/src/lib/action.source.sh b/src/lib/action.source.sh
index 918900f..36fef40 100644
--- a/src/lib/action.source.sh
+++ b/src/lib/action.source.sh
@@ -155,6 +155,7 @@ log_configured_action() {
     log_verbose "Effective output directory: ${DIST_DIR:-}"
     log_verbose "Effective template directory: ${TEMPLATE_DIR:-}"
     log_verbose "Effective favicon: ${FAVICON:-(bundled default)}"
+    log_verbose "Effective source URL: $SOURCE_URL"
     log_verbose "Effective image jobs: $IMAGE_JOBS"
     log_verbose "Effective ImageMagick timeout: ${IMAGEMAGICK_TIMEOUT}s"
     log_verbose "Effective tar timeout: ${TAR_TIMEOUT}s"
diff --git a/src/lib/config.print.source.sh b/src/lib/config.print.source.sh
index c5fe2b4..b886f8b 100644
--- a/src/lib/config.print.source.sh
+++ b/src/lib/config.print.source.sh
@@ -28,6 +28,7 @@ print_config() {
     print_shell_assignment DIST_DIR "$DIST_DIR"
     print_shell_assignment TEMPLATE_DIR "$TEMPLATE_DIR"
     print_shell_assignment FAVICON "$FAVICON"
+    print_shell_assignment SOURCE_URL "$SOURCE_URL"
     print_shell_assignment TITLE "$TITLE"
     print_shell_assignment HEIGHT "$HEIGHT"
     print_shell_assignment THUMBHEIGHT "$THUMBHEIGHT"
diff --git a/src/lib/config.source.sh b/src/lib/config.source.sh
index c13e807..c3c0731 100644
--- a/src/lib/config.source.sh
+++ b/src/lib/config.source.sh
@@ -39,6 +39,11 @@ apply_config_defaults() {
     ORIGINAL_BASEPATH="${ORIGINAL_BASEPATH:-}"
     RANDOM_SEED="${RANDOM_SEED:-}"
     SHUFFLE="${SHUFFLE:-no}"
+    # SOURCE_URL is the project/source link shown in the page footer ("Site
+    # generated ... with <SOURCE_URL>"). Defaults to the shuriken.sh repo;
+    # override it per site (e.g. to the album's own repo) via config or
+    # --source-url. The footer derives the displayed text from the URL itself.
+    SOURCE_URL="${SOURCE_URL:-https://codeberg.org/snonux/shuriken.sh}"
     SPLASH_PAGE="${SPLASH_PAGE:-yes}"
     STATS_PAGE="${STATS_PAGE:-yes}"
     SYNC_DELETE="${SYNC_DELETE:-yes}"
diff --git a/src/lib/template.source.sh b/src/lib/template.source.sh
index b5d3ad4..398e17d 100644
--- a/src/lib/template.source.sh
+++ b/src/lib/template.source.sh
@@ -190,6 +190,7 @@ declare -ra TEMPLATE_RENDER_FIELD_SPECS=(
     'render_preview_thumbs_html|context_raw|preview_thumbs|preview_thumbs|previewpage'
     'render_redirect_page_html|context_html|redirect_page|redirect_page|redirect'
     'render_show_header_bar|context_raw|show_header_bar|show_header_bar|header'
+    'render_source_url_html|config_html|SOURCE_URL||header'
     'render_stats_body_html|context_raw|stats_body|stats_body|stats'
     'render_stats_page_html|config_html|STATS_PAGE||header'
     'render_tarball_include|tarball_include|||footer'
@@ -605,6 +606,10 @@ prepare_template_render_var__config_html() {
         ORIGINAL_BASEPATH)
             context_value="$ORIGINAL_BASEPATH"
             ;;
+        SOURCE_URL)
+            # Always defaulted by apply_config_defaults (footer credit link).
+            context_value="${SOURCE_URL:-}"
+            ;;
         STATS_PAGE)
             # Always defaulted by apply_config_defaults; degrade to
             # "no" (link hidden) if somehow unset so the header bar