feat: Index exercises by name

BREAKING CHANGE: This changes the way you use `rustlings run` by now
requiring an abridged form of the previous filename, e.g:

`rustlings run exercises/if/if1.rs` becomes
`rustlings run if1`

6 files changed, 68 insertions, 15 deletions

diff --git a/info.toml b/info.toml
index d908c9e..96f27fa 100644
--- a/info.toml
+++ b/info.toml
@@ -1,241 +1,292 @@
 # VARIABLES
 
 [[exercises]]
+name = "variables1"
 path = "exercises/variables/variables1.rs"
 mode = "compile"
 
 [[exercises]]
+name = "variables2"
 path = "exercises/variables/variables2.rs"
 mode = "compile"
 
 [[exercises]]
+name = "variables3"
 path = "exercises/variables/variables3.rs"
 mode = "compile"
 
 [[exercises]]
+name = "variables4"
 path = "exercises/variables/variables4.rs"
 mode = "compile"
 
 # IF
 
 [[exercises]]
+name = "if1"
 path = "exercises/if/if1.rs"
 mode = "test"
 
 # FUNCTIONS
 
 [[exercises]]
+name = "functions1"
 path = "exercises/functions/functions1.rs"
 mode = "compile"
 
 [[exercises]]
+name = "functions2"
 path = "exercises/functions/functions2.rs"
 mode = "compile"
 
 [[exercises]]
+name = "functions3"
 path = "exercises/functions/functions3.rs"
 mode = "compile"
 
 [[exercises]]
+name = "functions4"
 path = "exercises/functions/functions4.rs"
 mode = "compile"
 
 [[exercises]]
+name = "functions5"
 path = "exercises/functions/functions5.rs"
 mode = "compile"
 
 # TEST 1
 
 [[exercises]]
+name = "test1"
 path = "exercises/test1.rs"
 mode = "test"
 
 # PRIMITIVE TYPES
 
 [[exercises]]
+name = "primitive_types1"
 path = "exercises/primitive_types/primitive_types1.rs"
 mode = "compile"
 
 [[exercises]]
+name = "primitive_types2"
 path = "exercises/primitive_types/primitive_types2.rs"
 mode = "compile"
 
 [[exercises]]
+name = "primitive_types3"
 path = "exercises/primitive_types/primitive_types3.rs"
 mode = "compile"
 
 [[exercises]]
+name = "primitive_types4"
 path = "exercises/primitive_types/primitive_types4.rs"
 mode = "test"
 
 [[exercises]]
+name = "primitive_types5"
 path = "exercises/primitive_types/primitive_types5.rs"
 mode = "compile"
 
 [[exercises]]
+name = "primitive_types6"
 path = "exercises/primitive_types/primitive_types6.rs"
 mode = "compile"
 
 # STRUCTS
 
 [[exercises]]
+name = "structs1"
 path = "exercises/structs/structs1.rs"
 mode = "test"
 
 [[exercises]]
+name = "structs2"
 path = "exercises/structs/structs2.rs"
 mode = "test"
 
 # STRINGS
 
 [[exercises]]
+name = "strings1"
 path = "exercises/strings/strings1.rs"
 mode = "compile"
 
 [[exercises]]
+name = "strings2"
 path = "exercises/strings/strings2.rs"
 mode = "compile"
 
 # TEST 2
 
 [[exercises]]
+name = "test2"
 path = "exercises/test2.rs"
 mode = "compile"
 
 # ENUMS
 
 [[exercises]]
+name = "enums1"
 path = "exercises/enums/enums1.rs"
 mode = "compile"
 
 [[exercises]]
+name = "enums2"
 path = "exercises/enums/enums2.rs"
 mode = "compile"
 
 [[exercises]]
+name = "enums3"
 path = "exercises/enums/enums3.rs"
 mode = "test"
 
 # TESTS
 
 [[exercises]]
+name = "tests1"
 path = "exercises/tests/tests1.rs"
 mode = "test"
 
 [[exercises]]
+name = "tests2"
 path = "exercises/tests/tests2.rs"
 mode = "test"
 
 [[exercises]]
+name = "tests3"
 path = "exercises/tests/tests3.rs"
 mode = "test"
 
 # TEST 3
 
 [[exercises]]
+name = "test3"
 path = "exercises/test3.rs"
 mode = "test"
 
 # MODULES
 
 [[exercises]]
+name = "modules1"
 path = "exercises/modules/modules1.rs"
 mode = "compile"
 
 [[exercises]]
+name = "modules2"
 path = "exercises/modules/modules2.rs"
 mode = "compile"
 
 # MACROS
 
 [[exercises]]
+name = "macros1"
 path = "exercises/macros/macros1.rs"
 mode = "compile"
 
 [[exercises]]
+name = "macros2"
 path = "exercises/macros/macros2.rs"
 mode = "compile"
 
 [[exercises]]
+name = "macros3"
 path = "exercises/macros/macros3.rs"
 mode = "compile"
 
 [[exercises]]
+name = "macros4"
 path = "exercises/macros/macros4.rs"
 mode = "compile"
 
 # TEST 4
 
 [[exercises]]
+name = "test4"
 path = "exercises/test4.rs"
 mode = "compile"
 
 # MOVE SEMANTICS
 
 [[exercises]]
+name = "move_semantics1"
 path = "exercises/move_semantics/move_semantics1.rs"
 mode = "compile"
 
 [[exercises]]
+name = "move_semantics2"
 path = "exercises/move_semantics/move_semantics2.rs"
 mode = "compile"
 
 [[exercises]]
+name = "move_semantics3"
 path = "exercises/move_semantics/move_semantics3.rs"
 mode = "compile"
 
 [[exercises]]
+name = "move_semantics4"
 path = "exercises/move_semantics/move_semantics4.rs"
 mode = "compile"
 
 # ERROR HANDLING
 
 [[exercises]]
+name = "errors1"
 path = "exercises/error_handling/errors1.rs"
 mode = "test"
 
 [[exercises]]
+name = "errors2"
 path = "exercises/error_handling/errors2.rs"
 mode = "test"
 
 [[exercises]]
+name = "errors3"
 path = "exercises/error_handling/errors3.rs"
 mode = "test"
 
 [[exercises]]
+name = "errors4"
 path = "exercises/error_handling/errorsn.rs"
 mode = "test"
 
 # OPTIONS / RESULTS
 
 [[exercises]]
+name = "option1"
 path = "exercises/error_handling/option1.rs"
 mode = "test"
 
 [[exercises]]
+name = "option2"
 path = "exercises/error_handling/result1.rs"
 mode = "test"
 
 # STANDARD LIBRARY TYPES
 
 [[exercises]]
+name = "arc1"
 path = "exercises/standard_library_types/arc1.rs"
 mode = "compile"
 
 [[exercises]]
+name = "iterators2"
 path = "exercises/standard_library_types/iterators2.rs"
 mode = "test"
 
 [[exercises]]
+name = "iterators3"
 path = "exercises/standard_library_types/iterators3.rs"
 mode = "test"
 
 [[exercises]]
+name = "iterators4"
 path = "exercises/standard_library_types/iterators4.rs"
 mode = "test"
 
 # THREADS
 
 [[exercises]]
+name = "threads1"
 path = "exercises/threads/threads1.rs"
 mode = "compile"
diff --git a/src/exercise.rs b/src/exercise.rs
index 6f526e7..9cd88a0 100644
--- a/src/exercise.rs
+++ b/src/exercise.rs
@@ -24,6 +24,7 @@ pub struct ExerciseList {
 
 #[derive(Deserialize)]
 pub struct Exercise {
+    pub name: String,
     pub path: PathBuf,
     pub mode: Mode,
 }
@@ -70,6 +71,7 @@ mod test {
     fn test_clean() {
         File::create(&temp_file()).unwrap();
         let exercise = Exercise {
+            name: String::from("example"),
             path: PathBuf::from("example.rs"),
             mode: Mode::Test,
         };
diff --git a/src/main.rs b/src/main.rs
index aad4cff..100186b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -25,8 +25,7 @@ fn main() {
             SubCommand::with_name("run")
                 .alias("r")
                 .about("Runs/Tests a single exercise")
-                .arg(Arg::with_name("file").required(true).index(1))
-                .arg(Arg::with_name("test").short("t").long("test").help("Run the file as a test")),
+                .arg(Arg::with_name("name").required(true).index(1)),
         )
         .get_matches();
 
@@ -55,20 +54,17 @@ fn main() {
     let exercises = toml::from_str::<ExerciseList>(toml_str).unwrap().exercises;
 
     if let Some(ref matches) = matches.subcommand_matches("run") {
-        let filename = matches.value_of("file").unwrap_or_else(|| {
-            println!("Please supply a file name!");
+        let name = matches.value_of("name").unwrap_or_else(|| {
+            println!("Please supply an exercise name!");
             std::process::exit(1);
         });
 
         let matching_exercise = |e: &&Exercise| {
-            Path::new(filename)
-                .canonicalize()
-                .map(|p| p.ends_with(&e.path))
-                .unwrap_or(false)
+            name == e.name
         };
 
         let exercise = exercises.iter().find(matching_exercise).unwrap_or_else(|| {
-            println!("No exercise found for your file name!");
+            println!("No exercise found for your given name!");
             std::process::exit(1)
         });
 
diff --git a/tests/fixture/failure/info.toml b/tests/fixture/failure/info.toml
index f4e7c0c..19e2bda 100644
--- a/tests/fixture/failure/info.toml
+++ b/tests/fixture/failure/info.toml
@@ -1,7 +1,9 @@
 [[exercises]]
+name = "compFailure"
 path = "compFailure.rs"
 mode = "compile"
 
 [[exercises]]
+name = "testFailure"
 path = "testFailure.rs"
-mode = "test"
\ No newline at end of file
+mode = "test"
diff --git a/tests/fixture/success/info.toml b/tests/fixture/success/info.toml
index e255db9..c6316c1 100644
--- a/tests/fixture/success/info.toml
+++ b/tests/fixture/success/info.toml
@@ -1,7 +1,9 @@
 [[exercises]]
+name = "compSuccess"
 path = "compSuccess.rs"
 mode = "compile"
 
 [[exercises]]
+name = "testSuccess"
 path = "testSuccess.rs"
-mode = "test"
\ No newline at end of file
+mode = "test"
diff --git a/tests/integration_tests.rs b/tests/integration_tests.rs
index 3acaf90..652ba60 100644
--- a/tests/integration_tests.rs
+++ b/tests/integration_tests.rs
@@ -40,7 +40,7 @@ fn verify_all_failure() {
 fn run_single_compile_success() {
     Command::cargo_bin("rustlings")
         .unwrap()
-        .args(&["r", "compSuccess.rs"])
+        .args(&["r", "compSuccess"])
         .current_dir("tests/fixture/success/")
         .assert()
         .success();
@@ -50,7 +50,7 @@ fn run_single_compile_success() {
 fn run_single_compile_failure() {
     Command::cargo_bin("rustlings")
         .unwrap()
-        .args(&["r", "compFailure.rs"])
+        .args(&["r", "compFailure"])
         .current_dir("tests/fixture/failure/")
         .assert()
         .code(1);
@@ -60,7 +60,7 @@ fn run_single_compile_failure() {
 fn run_single_test_success() {
     Command::cargo_bin("rustlings")
         .unwrap()
-        .args(&["r", "testSuccess.rs"])
+        .args(&["r", "testSuccess"])
         .current_dir("tests/fixture/success/")
         .assert()
         .success();
@@ -70,7 +70,7 @@ fn run_single_test_success() {
 fn run_single_test_failure() {
     Command::cargo_bin("rustlings")
         .unwrap()
-        .args(&["r", "testFailure.rs"])
+        .args(&["r", "testFailure"])
         .current_dir("tests/fixture/failure/")
         .assert()
         .code(1);