cli: --year N prints the year's key liturgical dates

On its own, `--year N` now prints a human-readable overview of the year's key
dates -- season boundaries, solemnities and feasts of the Lord -- computed from
the engine for the configured form (and custom-calendar layers), paged when a
pager is configured. With --format json|ical it still emits the machine
calendar (runFeed) as before. Numbered seasonal Sundays and Octave weekdays are
omitted from the solemnity list (the season boundary already marks them).

1 files changed, 7 insertions, 1 deletions

diff --git a/internal/cli/cli.go b/internal/cli/cli.go
index 56de12b..078d0c2 100644
--- a/internal/cli/cli.go
+++ b/internal/cli/cli.go
@@ -59,7 +59,8 @@ Flags:
       --format WHICH     json|ical: emit the computed calendar and exit
       --from DATE        range start YYYY-MM-DD (with --to; needs --format)
       --to DATE          range end YYYY-MM-DD (with --from; needs --format)
-      --year YYYY        emit the whole year YYYY (needs --format)
+      --year YYYY        key dates of the year -- seasons & solemnities (add
+                         --format json|ical to emit the machine calendar instead)
       --form WHICH       override calendar form old|new (needs --format)
   -v, --version          print the version and exit
   -h, --help             this help
@@ -228,6 +229,11 @@ func Run(args []string, stdin io.Reader, stdout, stderr io.Writer) int {
 		cfg.UILanguage = config.NormalizeUILanguage(uiLang)
 	}
 
+	// `--year N` on its own prints the human-readable key-dates overview;
+	// with --format (or --from/--to) it emits the machine calendar via runFeed.
+	if yearFlag != "" && format == "" && fromFlag == "" && toFlag == "" {
+		return runYearOverview(cfg, yearFlag, formFlag, pagerFlag, noPager, stdout, stderr)
+	}
 	if format != "" || fromFlag != "" || toFlag != "" || yearFlag != "" || formFlag != "" {
 		return runFeed(cfg, format, date, fromFlag, toFlag, yearFlag, formFlag, stdout, stderr)
 	}