jn0 split bootstrap.source.sh into logging/paths/startup modules

Separate the mixed concerns in bootstrap.source.sh per [SRP]:

- logging.source.sh: output_is_quiet, output_is_verbose, log_info,
  log_verbose, log_warning (the output/logging concern).
- paths.source.sh: resolve_default_rc_file, resolve_source_root,
  resolve_default_template_dir, resolve_default_asset_dir,
  template_dir_uses_default, apply_template_dir_default, init_config
  (install/source-root/default-dir + rc-file/template-dir resolution).
- bootstrap.source.sh keeps the CLI usage text and the shared
  resolve_config_array parser used by the config modules.

Pure code move, verified byte-identical function bodies. LIB_SOURCES now
lists logging.source.sh first, then bootstrap, then paths; matching
source directives added to src/shuriken.sh so --check-sourced sees the
new modules. just test/shellcheck/check-generated and git diff --check
all pass.

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

1 files changed, 30 insertions, 0 deletions

diff --git a/src/lib/logging.source.sh b/src/lib/logging.source.sh
new file mode 100644
index 0000000..b627b04
--- /dev/null
+++ b/src/lib/logging.source.sh
@@ -0,0 +1,30 @@
+# Output/logging utilities. Split out of bootstrap.source.sh (task jn0) so the
+# "how do we print to the user" concern lives apart from startup wiring and path
+# resolution. These helpers read the SHURIKEN_OUTPUT_MODE global and are called
+# from nearly every other module, so this file is kept early in LIB_SOURCES.
+# All library modules are sourced before any code runs, so definition order does
+# not affect availability.
+
+output_is_quiet() {
+    [ "$SHURIKEN_OUTPUT_MODE" = quiet ]
+}
+
+output_is_verbose() {
+    [ "$SHURIKEN_OUTPUT_MODE" = verbose ]
+}
+
+log_info() {
+    if ! output_is_quiet; then
+        printf '%s\n' "$*"
+    fi
+}
+
+log_verbose() {
+    if output_is_verbose; then
+        printf 'Verbose: %s\n' "$*"
+    fi
+}
+
+log_warning() {
+    printf 'WARNING: %s\n' "$*" >&2
+}