odin: scaffold project with CLI parser, version command, Go fallback

.gitignore

@@ -7,4 +7,5 @@ man
 # build artifacts
 builds
 envr
+envr-go
 result

cli.odin

@@ -0,0 +1,95 @@
+package main
+
+import "core:fmt"
+import "core:os"
+import "core:strings"
+
+Command :: struct {
+	name:     string,
+	args:     [dynamic]string,
+	flags:    map[string]string,
+	bool_set: map[string]bool,
+}
+
+IMPLEMENTED_COMMANDS := []string{
+	"version",
+}
+
+parse_args :: proc() -> (cmd: Command, ok: bool) {
+	args := os.args
+	if len(args) < 2 {
+		print_usage()
+		return Command{}, false
+	}
+
+	cmd.name = args[1]
+	cmd.args = make([dynamic]string)
+	cmd.flags = make(map[string]string)
+	cmd.bool_set = make(map[string]bool)
+
+	i := 2
+	for i < len(args) {
+		arg := args[i]
+		if strings.starts_with(arg, "--") {
+			key := arg[2:]
+			if i+1 < len(args) && !strings.starts_with(args[i+1], "-") {
+				cmd.flags[key] = args[i+1]
+				i += 2
+			} else {
+				cmd.bool_set[key] = true
+				i += 1
+			}
+		} else if strings.starts_with(arg, "-") && len(arg) == 2 {
+			key_slice := arg[1:2]
+			if i+1 < len(args) && !strings.starts_with(args[i+1], "-") {
+				cmd.flags[key_slice] = args[i+1]
+				i += 2
+			} else {
+				cmd.bool_set[key_slice] = true
+				i += 1
+			}
+		} else {
+			append(&cmd.args, arg)
+			i += 1
+		}
+	}
+
+	return cmd, true
+}
+
+is_implemented :: proc(name: string) -> bool {
+	for c in IMPLEMENTED_COMMANDS {
+		if c == name {
+			return true
+		}
+	}
+	return false
+}
+
+has_flag :: proc(cmd: ^Command, name: string) -> bool {
+	_, ok := cmd.flags[name]
+	if ok {
+		return true
+	}
+	_, ok2 := cmd.bool_set[name]
+	return ok2
+}
+
+print_usage :: proc() {
+	fmt.println("envr - Manage your .env files.")
+	fmt.println("")
+	fmt.println("Usage: envr <command> [args]")
+	fmt.println("")
+	fmt.println("Commands:")
+	fmt.println("  init          Set up envr")
+	fmt.println("  scan          Find and select .env files for backup")
+	fmt.println("  sync          Update or restore your env backups")
+	fmt.println("  backup <path> Import a .env file into envr")
+	fmt.println("  restore <path> Restore a .env file from the database")
+	fmt.println("  list          View your tracked files")
+	fmt.println("  remove <path> Remove a .env file from your database")
+	fmt.println("  check [path]  Check if files are backed up")
+	fmt.println("  deps          Check for missing binaries")
+	fmt.println("  version       Show envr's version")
+	fmt.println("  edit-config   Edit your config with your default editor")
+}

cmd_deps.odin

@@ -0,0 +1,30 @@
+package main
+
+import "core:fmt"
+
+cmd_deps :: proc(cmd: ^Command) {
+	feats := check_features()
+
+	headers := []string{"Feature", "Status"}
+	rows: [dynamic][]string
+
+	if .Git in feats {
+		append(&rows, []string{"Git", "\u2713 Available"})
+	} else {
+		append(&rows, []string{"Git", "\u2717 Missing"})
+	}
+
+	if .Fd in feats {
+		append(&rows, []string{"fd", "\u2713 Available"})
+	} else {
+		append(&rows, []string{"fd", "\u2717 Missing"})
+	}
+
+	if .Age in feats {
+		append(&rows, []string{"age", "\u2713 Available"})
+	} else {
+		append(&rows, []string{"age", "\u2717 Missing"})
+	}
+
+	render_table(headers, rows[:])
+}

features.odin

@@ -0,0 +1,45 @@
+package main
+
+import "core:os"
+import "core:strings"
+
+Feature :: enum {
+	Git,
+	Fd,
+	Age,
+}
+
+AvailableFeatures :: bit_set[Feature]
+
+check_features :: proc() -> AvailableFeatures {
+	feats: AvailableFeatures
+
+	if find_binary("git") != "" {
+		feats += {.Git}
+	}
+	if find_binary("fd") != "" {
+		feats += {.Fd}
+	}
+	if find_binary("age") != "" {
+		feats += {.Age}
+	}
+
+	return feats
+}
+
+find_binary :: proc(name: string) -> string {
+	path_env := os.get_env("PATH", context.allocator)
+	paths := strings.split(path_env, ":")
+	for p in paths {
+		candidate := strings.join({strings.trim_right(p, "/"), name}, "/")
+		_, err := os.stat(candidate, context.allocator)
+		if err == nil {
+			return candidate
+		}
+	}
+	return ""
+}
+
+has_feature :: proc(feats: AvailableFeatures, f: Feature) -> bool {
+	return f in feats
+}

flake.nix

@@ -97,8 +97,8 @@
                 gotools
                 cobra-cli
 
-                odin
+                unstable.odin
-                ols
+                unstable.ols
 
                 # Build tools
                 zip

main.odin

@@ -1,8 +1,56 @@
 package main
 
 import "core:fmt"
+import "core:os"
+
+GO_BINARY :: "./envr-go"
 
 main :: proc() {
-	fmt.println("Hello!")
+	cmd, ok := parse_args()
+	if !ok {
+		return
 	}
 
+	if !is_implemented(cmd.name) {
+		fallback_to_go()
+		return
+	}
+
+	switch cmd.name {
+	case "version":
+		cmd_version(&cmd)
+	case:
+		fmt.printf("Unknown command: %s\n", cmd.name)
+		print_usage()
+		os.exit(1)
+	}
+}
+
+fallback_to_go :: proc() {
+	args := make([dynamic]string)
+	append(&args, "./envr-go")
+	for i in 1..<len(os.args) {
+		append(&args, os.args[i])
+	}
+
+	desc := os.Process_Desc{
+		command = args[:],
+		stdin = os.stdin,
+		stdout = os.stdout,
+		stderr = os.stderr,
+	}
+
+	p, err1 := os.process_start(desc)
+	if err1 != nil {
+		fmt.printf("Error: failed to run envr-go: %v\n", err1)
+		os.exit(1)
+	}
+
+	state, err2 := os.process_wait(p)
+	if err2 != nil {
+		fmt.printf("Error waiting for envr-go: %v\n", err2)
+		os.exit(1)
+	}
+
+	os.exit(int(state.exit_code))
+}

stubs.odin

@@ -0,0 +1,39 @@
+package main
+
+import "core:fmt"
+
+cmd_init :: proc(cmd: ^Command) {
+	fmt.println("TODO: init")
+}
+
+cmd_list :: proc(cmd: ^Command) {
+	fmt.println("TODO: list")
+}
+
+cmd_scan :: proc(cmd: ^Command) {
+	fmt.println("TODO: scan")
+}
+
+cmd_sync :: proc(cmd: ^Command) {
+	fmt.println("TODO: sync")
+}
+
+cmd_backup :: proc(cmd: ^Command) {
+	fmt.println("TODO: backup")
+}
+
+cmd_restore :: proc(cmd: ^Command) {
+	fmt.println("TODO: restore")
+}
+
+cmd_remove :: proc(cmd: ^Command) {
+	fmt.println("TODO: remove")
+}
+
+cmd_check :: proc(cmd: ^Command) {
+	fmt.println("TODO: check")
+}
+
+cmd_edit_config :: proc(cmd: ^Command) {
+	fmt.println("TODO: edit-config")
+}

table.odin

@@ -0,0 +1,84 @@
+package main
+
+import "core:fmt"
+import "core:strings"
+
+render_table :: proc(headers: []string, rows: [][]string) {
+	if !is_tty() {
+		render_json_rows(headers, rows)
+		return
+	}
+
+	col_widths := make([dynamic]int, len(headers))
+	for i in 0..<len(headers) {
+		append(&col_widths, len(headers[i]))
+	}
+	for r in rows {
+		for i in 0..<len(r) {
+			if i < len(col_widths) && len(r[i]) > col_widths[i] {
+				col_widths[i] = len(r[i])
+			}
+		}
+	}
+
+	b: strings.Builder
+	strings.builder_init(&b)
+	defer strings.builder_destroy(&b)
+	defer delete(col_widths)
+
+	hline :: proc(b: ^strings.Builder, left, mid, right: string, widths: [dynamic]int) {
+		strings.write_string(b, left)
+		for i in 0..<len(widths) {
+			for _ in 0..<widths[i]+2 {
+				strings.write_string(b, "\u2500")
+			}
+			if i < len(widths)-1 {
+				strings.write_string(b, mid)
+			} else {
+				strings.write_string(b, right)
+			}
+		}
+		fmt.println(strings.to_string(b^))
+		strings.builder_reset(b)
+	}
+
+	hline(&b, "\u250c", "\u252c", "\u2510", col_widths)
+
+	strings.write_string(&b, "\u2502")
+	for i in 0..<len(headers) {
+		fmt.sbprintf(&b, " %-*s \u2502", col_widths[i], headers[i])
+	}
+	fmt.println(strings.to_string(b))
+	strings.builder_reset(&b)
+
+	hline(&b, "\u251c", "\u253c", "\u2524", col_widths)
+
+	for r in rows {
+		strings.write_string(&b, "\u2502")
+		for i in 0..<len(r) {
+			fmt.sbprintf(&b, " %-*s \u2502", col_widths[i], r[i])
+		}
+		fmt.println(strings.to_string(b))
+		strings.builder_reset(&b)
+	}
+
+	hline(&b, "\u2514", "\u2534", "\u2518", col_widths)
+}
+
+render_json_rows :: proc(headers: []string, rows: [][]string) {
+	fmt.print("[")
+	for i in 0..<len(rows) {
+		if i > 0 {
+			fmt.print(",")
+		}
+		fmt.print("{")
+		for j in 0..<len(headers) {
+			if j > 0 {
+				fmt.print(",")
+			}
+			fmt.printf("\"%s\":\"%s\"", headers[j], rows[i][j])
+		}
+		fmt.print("}")
+	}
+	fmt.println("]")
+}

tty.odin

@@ -0,0 +1,7 @@
+package main
+
+import "core:sys/posix"
+
+is_tty :: proc() -> bool {
+	return bool(posix.isatty(1))
+}

version.odin

@@ -0,0 +1,13 @@
+package main
+
+import "core:fmt"
+
+VERSION :: "0.2.0"
+
+cmd_version :: proc(cmd: ^Command) {
+	if has_flag(cmd, "long") || has_flag(cmd, "l") {
+		fmt.printf("envr version %s\n", VERSION)
+	} else {
+		fmt.println(VERSION)
+	}
+}