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, 138 insertions, 0 deletions

diff --git a/src/lib/paths.source.sh b/src/lib/paths.source.sh
new file mode 100644
index 0000000..d0db74b
--- /dev/null
+++ b/src/lib/paths.source.sh
@@ -0,0 +1,138 @@
+# Path resolution. Split out of bootstrap.source.sh (task jn0) so the install /
+# source-root / default-directory discovery and the rc-file/template-dir
+# defaulting live apart from startup wiring and logging. These helpers resolve
+# where the packaged config, templates and assets live (both when installed and
+# when running from a source checkout) and initialise a fresh shuriken.conf.
+# All library modules are sourced before any code runs, so definition order does
+# not affect availability (e.g. init_config calls log_info from
+# logging.source.sh).
+
+resolve_default_rc_file() {
+    local source_root
+
+    if [ -f "$DEFAULTRC" ]; then
+        printf '%s\n' "$DEFAULTRC"
+        return
+    fi
+
+    source_root=$(resolve_source_root)
+
+    if [ -n "$source_root" ]; then
+        printf '%s\n' "$source_root/src/shuriken.default.conf"
+        return
+    fi
+
+    printf '%s\n' "$DEFAULTRC"
+}
+
+resolve_source_root() {
+    local script_dir
+    local source_root
+
+    script_dir="$SHURIKEN_SOURCE_DIR"
+    source_root=$(cd "$script_dir/.." && pwd)
+
+    if [[ -f "$source_root/src/shuriken.default.conf" \
+        && -d "$source_root/share/templates/default" ]]; then
+        printf '%s\n' "$source_root"
+    fi
+}
+
+resolve_default_template_dir() {
+    local source_root
+
+    if [ -d "$DEFAULT_TEMPLATE_DIR" ]; then
+        printf '%s\n' "$DEFAULT_TEMPLATE_DIR"
+        return
+    fi
+
+    source_root=$(resolve_source_root)
+
+    if [ -n "$source_root" ]; then
+        printf '%s\n' "$source_root/share/templates/default"
+        return
+    fi
+
+    printf '%s\n' "$DEFAULT_TEMPLATE_DIR"
+}
+
+resolve_default_asset_dir() {
+    local source_root
+
+    if [ -d "$DEFAULT_ASSET_DIR" ]; then
+        printf '%s\n' "$DEFAULT_ASSET_DIR"
+        return
+    fi
+
+    source_root=$(resolve_source_root)
+
+    if [ -n "$source_root" ]; then
+        printf '%s\n' "$source_root/assets/site"
+        return
+    fi
+
+    printf '%s\n' "$DEFAULT_ASSET_DIR"
+}
+
+template_dir_uses_default() {
+    if [ -z "${TEMPLATE_DIR+x}" ] || [ -z "$TEMPLATE_DIR" ]; then
+        return 1
+    fi
+
+    case "$TEMPLATE_DIR" in
+        "$PACKAGED_TEMPLATE_DIR"|"$DEFAULT_TEMPLATE_DIR")
+            return 0
+            ;;
+        *)
+            return 1
+            ;;
+    esac
+}
+
+apply_template_dir_default() {
+    if template_dir_uses_default; then
+        TEMPLATE_DIR=$(resolve_default_template_dir)
+    fi
+}
+
+init_config() {
+    local -r rc_file=shuriken.conf
+    local default_rc_file
+    local rewritten_rc_file
+    local source_root
+    local source_template_dir
+
+    if [ -f "$rc_file" ]; then
+        printf 'Error: %s already exists\n' "$rc_file" >&2
+        exit 1
+    fi
+
+    default_rc_file=$(resolve_default_rc_file)
+
+    if [ ! -f "$default_rc_file" ]; then
+        printf 'Error: Can not find config file %s\n' "$default_rc_file" >&2
+        exit 1
+    fi
+
+    cp "$default_rc_file" "$rc_file"
+
+    source_root=$(resolve_source_root)
+    if [[ -n "$source_root" \
+        && "$default_rc_file" = "$source_root/src/shuriken.default.conf" ]]; then
+        source_template_dir="$source_root/share/templates/default"
+        rewritten_rc_file=$(mktemp "${rc_file}.XXXXXX")
+        if ! awk -v template_dir="$source_template_dir" \
+            '/^TEMPLATE_DIR=/ {
+                print "TEMPLATE_DIR=" template_dir
+                next
+            }
+            { print }' "$rc_file" > "$rewritten_rc_file"; then
+            rm -f "$rewritten_rc_file"
+            exit 1
+        fi
+        cat "$rewritten_rc_file" > "$rc_file"
+        rm -f "$rewritten_rc_file"
+    fi
+
+    log_info "Created ./$rc_file"
+}