sheet extension: fix example breakage, add test

app/ext_example/Makefile

@@ -111,7 +111,12 @@ ${BUILD_DIR}/bin/cli:
 ${BUILD_DIR}/objs/utils/%.o:
 	(cd .. && ${MAKE} CONFIGFILE=${CONFIGFILEPATH} CC=${CC} DEBUG=${DEBUG} $@ )
 
-test: test-1 test-2 test-3 test-4 test-5 test-thirdparty
+TESTS=test-1 test-2 test-3 test-4 test-5 test-thirdparty
+ifeq ($(ZSVSHEET_BUILD),1)
+  TESTS+=test-sheet-extension
+endif
+
+test: ${TESTS}
 
 test-1: test-%: ${CLI} ${TARGET}
 	@${RUN_CLI} my-echo < ${THIS_LIB_BASE}/data/quoted.csv > /tmp/[email protected]
@@ -132,6 +137,27 @@ test-3: test-%: ${CLI} ${TARGET}
 	@${RUN_CLI} help 2>&1 | grep -v [.]so >> /tmp/[email protected] || [ 1==1 ]
 	@cmp /tmp/[email protected] 2>&1 test/expected/[email protected] && ${TEST_PASS} || ${TEST_FAIL}
 
+../test/worldcitiespop_mil.csv:
+	make -C ../test worldcitiespop_mil.csv
+
+TMP_DIR=/tmp
+TMUX_TERM=xterm-256color
+test-sheet-extension: ../test/worldcitiespop_mil.csv
+	@rm -f ${TMP_DIR}/[email protected] tmux-*.log
+	@tmux kill-session -t $@ || echo 'No tmux session to kill'
+	@${RUN_CLI} unregister my 2>/dev/null 1>/dev/null || [ 1==1 ]
+	@${RUN_CLI} register my 2>&1 | grep -v [.]so || [ 1==1 ]
+	@echo 'set-option default-terminal "${TMUX_TERM}"' > ~/.tmux.conf
+	@(ZSV_CONFIG_DIR=/tmp tmux -v new-session -x 80 -y 5 -d -s $@ && \
+	sleep 0.5 && \
+	tmux send-keys -t $@ "${CLI} sheet ../test/worldcitiespop_mil.csv" ENTER && \
+	sleep 0.5 && \
+	tmux send-keys -t $@ "t" "hello" Enter && \
+	tmux capture-pane -t $@ -p > ${TMP_DIR}/[email protected] && \
+	tmux kill-session -t $@ && \
+	cmp ${TMP_DIR}/[email protected] test/expected/[email protected] && ${TEST_PASS} || (echo 'Incorrect output:' && \
+	if [ -f ${TMP_DIR}/[email protected] ]; then cat ${TMP_DIR}/[email protected]; fi && ${TEST_FAIL}))
+
 test-4: test-%: ${CLI} ${TARGET}
 	@${RUN_CLI} unregister my 2>/dev/null 1>/dev/null || [ 1==1 ]
 	@${RUN_CLI} license > /tmp/[email protected] 2>> /tmp/[email protected]

app/ext_example/my_extension.c

@@ -137,7 +137,7 @@ enum zsv_ext_status zsv_ext_init(struct zsv_ext_callbacks *cb, zsv_execution_con
   zsv_cb.ext_add_command(ctx, "echo", "print the input data back to stdout", echo_main);
 
 #ifdef ZSVSHEET_BUILD
-  int proc_id = zsv_cb.ext_sheet_register_proc("my-test-command", my_test_command_handler);
+  int proc_id = zsv_cb.ext_sheet_register_proc("my-test-command", "my test command", my_test_command_handler);
   if (proc_id < 0)
     return zsv_ext_status_error;
   zsv_cb.ext_sheet_register_proc_key_binding('t', proc_id);

app/ext_example/test/expected/test-sheet-extension.out

@@ -0,0 +1,5 @@
+Row #                     buffer #                  file name
+1                         2                         ../test/worldcitiespop_mi
+
+
+? for help 1

app/test/Makefile

@@ -48,13 +48,14 @@ TEST_DATA_DIR=${THIS_LIB_BASE}/data
 SOURCES=echo count count-pull select select-pull sql 2json serialize flatten pretty desc stack 2db 2tsv jq compare overwrite
 TARGETS=$(addprefix ${BUILD_DIR}/bin/zsv_,$(addsuffix ${EXE},${SOURCES}))
 
-TESTS=test-blank-leading-rows $(addprefix test-,${SOURCES}) test-rm test-mv test-2json-help test-sheet test-paste
+TESTS=test-blank-leading-rows $(addprefix test-,${SOURCES}) test-rm test-mv test-2json-help test-paste
 
 ifeq ($(ZSV_BUILD_SHEET),1)
   SOURCES+=sheet
   CFLAGS+=-DZSV_BUILD_SHEET
   CFLAGS+=${CFLAGS_NCURSES}
   LDFLAGS+=${LDFLAGS_NCURSES}
+  TESTS+=test-sheet
 endif
 
 COLOR_NONE=\033[0m

include/zsv/ext.h

@@ -157,7 +157,7 @@ struct zsv_ext_callbacks {
   /****************************************
    * Registering a custom `sheet` command *
    ****************************************/
-  zsvsheet_proc_id_t (*ext_sheet_register_proc)(const char *name,
+  zsvsheet_proc_id_t (*ext_sheet_register_proc)(const char *name, const char *description,
                                                 zsvsheet_status (*handler)(zsvsheet_proc_context_t ctx));
 
   /**