feat: add simple getopt cli

.gitignore

@@ -1 +1,4 @@
 out/
+examples/
+compile_commands.json
+.cache/

Makefile

@@ -11,6 +11,8 @@ OBJ = $(SRC:.c=.o)
 OUTDIR := out/
 OBJDIR := out/obj
 BINDIR := out/bin
+CFLAGS += -DSCI_VERSION="\"$(VERSION)\"" -DSCI_NAME="\"$(NAME)\""
+CFLAGS += -Wall -Werror
 
 .PHONY: all clean
 

README.md

@@ -1,4 +1,4 @@
-# Suckless Continous Integration
+# Suckless/Simple Continous Integration
 Jenkins, Travis, GitHub Actions, GitLab CI. The list goes on.
 This is a minimal tool for fulfilling the CI (Continous Integration) use case.
 
@@ -70,3 +70,12 @@ What language should I implement `scid` in?
  - `java` slow devtime, bloated. No.
  - `rust` slow devtime (not familiar), great tooling, too many risks for a first prototype. No.
  - `shell` quick, easy, instant spaghetti. No.
+
+I choose `c`!
+
+I also choose `Makefile`s! - Just to force myself to use another build system than CMake!
+If you want `compile_commands.json` files, you should use [bear](https://github.com/rizsotto/Bear) as it works well
+
+### Progress
+ - [ ] Zeroth things first, let's create a simple CLI application with `--verbosity VAL` and `--help` options.
+ - [ ] First things first, let's implement something that reacts when some provided file changes.

src/main.c

@@ -1,5 +1,64 @@
 #include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <getopt.h>
+
+struct cli_options {
+    int verbosity;
+    bool help;
+    bool version;
+};
+
+struct cli_options new_options() {
+    struct cli_options result;
+    result.verbosity = 0;
+    result.help = false;
+    return result;
+}
+
+//                                                         <max
+char* help_msg = 
+    "Usage: %s [-v level] [-h] [-V]\n"
+    "\n"
+    SCI_NAME " is a simple contiuous integration system.\n"
+    "\n"
+    "OPTIONS:\n"
+    "  -v level    Set verbosity level [0-3]\n"
+    "  -h          Show this message and exit\n"
+    "  -V          Show version and exit\n"
+    ;
+//                                                         <max
+
+void print_help(FILE * out, char* prog_name) {
+    fprintf(out, help_msg, prog_name);
+}
 
 int main(int argc, char** argv) {
-    printf("Hello, World!\n");
+    struct cli_options options = new_options();
+    int opt;
+    while((opt = getopt(argc, argv, "v:hV")) != -1) {
+        switch(opt) {
+            case 'v':
+                options.verbosity = atoi(optarg);
+                break;
+            case 'V':
+                options.version = true;
+                break;
+            case 'h':
+                options.help = true;
+                break;
+            default: // '?'
+                print_help(stderr, argv[0]);
+                exit(EXIT_FAILURE);
+        }
+    }
+    if(options.help) {
+        print_help(stdout, argv[0]);
+        exit(EXIT_SUCCESS);
+    }
+    if(options.version) {
+        fprintf(stdout, SCI_VERSION "\n");
+        exit(EXIT_SUCCESS);
+    }
 }