Initial commit

.gitignore

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+editor.txt
+/lessons
+.build

README.md

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+# Tomo Koans
+
+This is a program to help you learn the Tomo programming language by walking
+you through some example programs.
+
+```
+tomo koans.tm
+```

koans.tm

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+#!/bin/env tomo
+
+use colorful
+use shell
+use commands
+
+enum TestResult(Success(output:Text), Error(err:Text), WrongOutput(actual:Text, expected:Text)):
+    func print(result:TestResult):
+        when result is Success(s):
+            $Colorful"
+                @(b,u:Program Output:)
+                $s
+            ":print()
+        is Error(e):
+            $Colorful"
+                @(b,u:Program Errors:)
+
+                $e
+            ":print()
+        is WrongOutput(actual, expected):
+            $Colorful"
+                @(b,u:Program Output:)
+                @(red:$actual)
+                @(b,u:Expected:)
+                @(green:$expected)
+            ":print()
+
+    func is_success(result:TestResult -> Bool):
+        when result is Success: return yes
+        else: return no
+
+struct Lesson(file:Path, description:Text, expected_output=none:Text):
+    func get_result(l:Lesson -> TestResult):
+        result := $Shell"COLOR=1 tomo -O 0 $(l.file)":result()
+        if not result:succeeded():
+            return Error(Text.from_bytes(result.stderr)!)
+
+        output := Text.from_bytes(result.stdout)!
+        if expected := l.expected_output:
+            if output != l.expected_output:
+                return WrongOutput(output, expected)
+
+        return Success(output)
+
+LESSONS := [
+    Lesson((./lessons/lesson-01.tm), "Getting Started", "Hello world$\n"),
+    Lesson((./lessons/lesson-02.tm), "Working with Text"),
+]
+
+func ask_continue():
+    _ := ask("$\033[2mPress Enter to continue...$\033[m", bold=no)
+
+func clear_screen():
+    say("$\x1b[2J$\x1b[H", newline=no)
+
+func summarize_tests(highlight=none:Path):
+    $Colorful"
+        
+        @(yellow,b,u:Lessons)
+    ":print()
+
+    passing := 0
+    failing := 0
+    for i,lesson in LESSONS:
+        result := lesson:get_result()
+        if result:is_success():
+            passing += 1
+            $Colorful"
+                @(green,bold:$(Text(i):left_pad(2)): "$(lesson.description)" (passes))
+            ":print()
+        else:
+            failing += 1
+            if lesson.file == highlight or (highlight == none:Path and failing == 1):
+                $Colorful"
+                    @(red:$(Text(i):left_pad(2)): "$(lesson.description)" (not yet passing))
+                ":print()
+            else:
+                $Colorful"
+                    @(dim:$(Text(i):left_pad(2)): "$(lesson.description)" (not yet passing))
+                ":print()
+
+    completed := (Num(passing)/Num(passing+failing))!
+    $Colorful"
+
+        @(cyan,b:Progress: $(completed:percent()))
+
+    ":print()
+
+func main(clean=no):
+    clear_screen()
+    $Colorful"
+        $\n@(bold,green:Hello and welcome to the Tomo Koans program!)
+
+        We're going to run through some programs that don't work
+        and you'll be fixing them up!
+
+        I hope you have fun!
+
+    ":print()
+
+    editor := if (./editor.txt):exists():
+        (./editor.txt):read()!
+    else:
+        e := ask("What command line text editor do you want to use? ")!
+        (./editor.txt):write(e)
+        e
+
+    $Colorful"You're using @(b:$editor)$\n":print()
+
+    if clean:
+        (./lessons):remove()
+
+    $Shell"
+        cp -r lesson-templates lessons
+    ":run():or_fail("Could not make lessons directory")
+
+    repeat:
+        ask_continue()
+        clear_screen()
+        summarize_tests()
+        choice := ask("Choose a test or (q)uit: ") or stop repeat
+        if choice == "q" or choice == "Q": stop repeat
+
+        if choice == "":
+            for i,l in LESSONS:
+                if not l:get_result():is_success():
+                    choice = Text(i)
+                    stop
+
+        n := Int.parse(choice) or (do:
+            $Colorful"@(red:I don't know what that means! Type a test number or 'q'.)":print()
+            skip repeat
+        )
+
+        if n < 1 or n > LESSONS.length:
+            $Colorful"@(red:That's not a valid test number!)":print()
+            skip repeat
+
+        lesson := LESSONS[n]
+        clear_screen()
+
+        repeat:
+            $Colorful"
+
+                @(yellow,b,u:Lesson $n: "$(lesson.description)")
+                Here's what we have right now:
+
+            ":print()
+
+            result := lesson:get_result()
+            result:print()
+            if result:is_success():
+                stop repeat
+
+            summarize_tests(highlight=lesson.file)
+            action := ask("That didn't go so well. (e)dit the file and try again? Or (Q)uit? ")
+            if action:
+                if action:lower() == "e":
+                    $Shell"
+                        $editor $(lesson.file)
+                    ":run():or_fail("Could not open editor $editor")
+                    skip repeat
+
+            $Colorful"Goodbye! Come back again soon!":print()
+            return
+
+        $Colorful"
+            @(green,b:✨ Good job, that succeeded! ✨)
+
+        ":print()
+    
+    clear_screen()
+    $Colorful"@(b:Goodbye! Come back again soon!)":print()

lesson-templates/lesson-01.tm

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+# This is a simple "Hello world" program.
+# Edit it so it prints the text "Hello world":
+
+func main():
+    say("Goodbye moon")

lesson-templates/lesson-02.tm

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+func main():
+    say("
+        Let's learn about text concatenation!
+        It uses the `++` operator:
+    ")
+
+    greeting := "Hello "
+
+    ##############################################################
+    ###################### EDIT BELOW HERE #######################
+    ##############################################################
+
+    your_text := greeting ++ "space"
+
+    ##############################################################
+    ################## DO NOT EDIT AFTER HERE ####################
+    ##############################################################
+
+    say(your_text)
+
+    >> your_text
+    = "Hello world"