basic structure

.gitignore

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+histui
+object/

Makefile

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+.PHONY: clean run
+
+ifeq (${DEBUG}, 1)
+  LFLAGS   += --debug --trace
+  CXXFLAGS += -Wall -Wextra -Wpedantic 
+  CXXFLAGS += -DDEBUG -O0 -ggdb -fno-inline	
+  WRAP     := valgrind --track-origins=yes --leak-check=full --show-leak-kinds=all 
+else
+  CXXFLAGS += -O3 -fno-stack-protector -fno-exceptions -fno-rtti
+endif
+
+LDLIBS   += $$(pkgconf --cflags --libs ncurses) $$(pkgconf --cflags --libs readline)
+CXXFLAGS += -std=gnu++20 -I./source/ -I./object/ -I./
+
+OBJECT.d:=object/
+SOURCE.d:=source/
+SOURCE:=main.cpp tui.cpp db.cpp config.l
+SOURCE:=$(addprefix ${SOURCE.d},${SOURCE})
+OBJECT:=$(addprefix ${OBJECT.d},$(subst ${SOURCE.d},,$(addsuffix .o,$(basename ${SOURCE}))))
+
+OUTPUT:=histui
+
+${OUTPUT}: ${OBJECT}
+	${LINK.cpp} ${OBJECT} -o ${OUTPUT} ${LDLIBS}
+
+object/%.l.cpp: source/%.l
+	${LEX} ${LFLAGS} -o $@ $<
+
+object/%.o: object/%.l.cpp
+	${COMPILE.cpp} $< -o $@
+
+object/%.o: source/%.cpp
+	${COMPILE.cpp} $< -o $@
+
+clean:
+	-rm ${OBJECT.d}/*
+	-rm ./${OUTPUT}
+
+run:
+	./${OUTPUT}

source/config.hpp

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+int read_config(const char * const file);

source/config.l

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+%option noyywrap
+%option nodefault
+%option noyylineno
+
+%%
+
+%%
+
+int read_config(const char * const file) {
+    return 0;
+}

source/db.cpp

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+#include "db.hpp"
+
+inline const char * db_file;
+
+signed export_main(int argc, char * * argv) {
+    return 0;
+}
+
+signed import_main(int argc, char * * argv) {
+    return 0;
+}

source/db.hpp

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+#include <time.h>
+#include <string>
+#include <vector>
+
+struct Shell {
+    size_t id;
+    std::string name;
+};
+
+struct Entry {
+    std::string line;
+    time_t timestamp;
+    Shell * shell;
+};
+
+extern const char * db_file;
+
+extern void append_entry(const Entry * const entry);
+extern std::vector<Entry> search(const char * const query);
+extern std::vector<Entry> inspect(const Entry * const entry);
+
+extern signed export_main(int argc, char * * argv);
+extern signed import_main(int argc, char * * argv);
+

source/main.cpp

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+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <map>
+#include <string>
+
+#include "tui.hpp"
+#include "db.hpp"
+
+using namespace std;
+
+[[ noreturn ]]
+void version() {
+    puts("Histui "
+    #include "version.inc"
+    );
+
+    exit(0);
+}
+
+[[ noreturn ]]
+void usage(int exit_value = 0) {
+    ;
+    exit(exit_value);
+}
+
+void global_options(const int argc, const char * const * const argv) {
+    for(int i = 0; i < argc; i++) {
+        if (not strcmp(argv[i], "-v")
+        ||  not strcmp(argv[i], "--version")) {
+            version();
+        }
+        if (not strcmp(argv[i], "-h")
+        ||  not strcmp(argv[i], "--help")) {
+            usage();
+        }
+    }
+}
+
+typedef signed (*mainlike_t)(int argc, char * * argv);
+map<const char*, mainlike_t> verb_table = {
+    {"tui", tui_main},
+    {"import", import_main},
+    {"export", export_main},
+};
+
+signed main(int argc, char * * argv) {
+    if (argc < 2) {
+        usage(2);
+    }
+
+    global_options(argc, argv);
+
+    for (const auto &i : verb_table) {
+        if (not strcmp(argv[1], i.first)) {
+            return i.second(argc, argv);
+        }
+    }
+
+    return 1;
+}

source/tui.cpp

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+#include "tui.hpp"
+
+#include <stdio.h>
+#include <ncurses.h>
+
+#include "config.hpp"
+
+signed tui_main(int argc, char * * argv) {
+    read_config(NULL);
+    return 0;
+}

source/tui.hpp

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+signed tui_main(int argc, char * * argv);

source/version.inc

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+"0.1"