Adding set_name and support for names to app

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 * Make unlimited positionals vs. unlimited options more intuitive [#102]
 * Add missing getters `get_options` and `get_description` to App [#105]
+* The app name now can be set, and will override the auto name if present [#105]
 
 [#102]: https://github.com/CLIUtils/CLI11/issues/102
 [#105]: https://github.com/CLIUtils/CLI11/issues/105

include/CLI/App.hpp

@@ -64,8 +64,8 @@ class App {
     /// @name Basics
     ///@{
 
-    /// Subcommand name or program name (from parser)
+    /// Subcommand name or program name (from parser if name is empty)
-    std::string name_{"program"};
+    std::string name_;
 
     /// Description of the current program/subcommand
     std::string description_;
@@ -193,7 +193,8 @@ class App {
     ///@{
 
     /// Create a new program. Pass in the same arguments as main(), along with a help string.
-    App(std::string description_ = "") : App(description_, nullptr) {
+    App(std::string description_ = "", std::string name = "") : App(description_, nullptr) {
+        name_ = name;
         set_help_flag("-h,--help", "Print this help message and exit");
     }
 
@@ -211,6 +212,12 @@ class App {
         return this;
     }
 
+    /// Set a name for the app (empty will use parser to set the name)
+    App *set_name(std::string name = "") {
+        name_ = name;
+        return this;
+    }
+
     /// Remove the error when extras are left over on the command line.
     App *allow_extras(bool allow = true) {
         allow_extras_ = allow;
@@ -723,7 +730,10 @@ class App {
     /// Parses the command line - throws errors
     /// This must be called after the options are in but before the rest of the program.
     void parse(int argc, char **argv) {
+        // If the name is not set, read from command line
+        if(name_.empty())
             name_ = argv[0];
+
         std::vector<std::string> args;
         for(int i = argc - 1; i > 0; i--)
             args.emplace_back(argv[i]);
@@ -890,7 +900,7 @@ class App {
 
         std::stringstream out;
         out << description_ << std::endl;
-        out << "Usage: " << prev;
+        out << "Usage:" << (prev.empty() ? "" : " ") << prev;
 
         // Check for options_
         bool npos = false;
@@ -1030,6 +1040,7 @@ class App {
 
     /// Get a pointer to the config option. (const)
     const Option *get_config_ptr() const { return config_ptr_; }
+
     /// Get the name of the current app
     std::string get_name() const { return name_; }
 

tests/HelpTest.cpp

@@ -36,7 +36,7 @@ TEST(THelp, Footer) {
 }
 
 TEST(THelp, OptionalPositional) {
-    CLI::App app{"My prog"};
+    CLI::App app{"My prog", "program"};
 
     std::string x;
     app.add_option("something", x, "My option here");
@@ -71,7 +71,7 @@ TEST(THelp, Hidden) {
 }
 
 TEST(THelp, OptionalPositionalAndOptions) {
-    CLI::App app{"My prog"};
+    CLI::App app{"My prog", "AnotherProgram"};
     app.add_flag("-q,--quick");
 
     std::string x;
@@ -82,7 +82,7 @@ TEST(THelp, OptionalPositionalAndOptions) {
     EXPECT_THAT(help, HasSubstr("My prog"));
     EXPECT_THAT(help, HasSubstr("-h,--help"));
     EXPECT_THAT(help, HasSubstr("Options:"));
-    EXPECT_THAT(help, HasSubstr("Usage: program [OPTIONS] [something]"));
+    EXPECT_THAT(help, HasSubstr("Usage: AnotherProgram [OPTIONS] [something]"));
 }
 
 TEST(THelp, RequiredPositionalAndOptions) {
@@ -98,7 +98,7 @@ TEST(THelp, RequiredPositionalAndOptions) {
     EXPECT_THAT(help, HasSubstr("-h,--help"));
     EXPECT_THAT(help, HasSubstr("Options:"));
     EXPECT_THAT(help, HasSubstr("Positionals:"));
-    EXPECT_THAT(help, HasSubstr("Usage: program [OPTIONS] something"));
+    EXPECT_THAT(help, HasSubstr("Usage: [OPTIONS] something"));
 }
 
 TEST(THelp, MultiOpts) {
@@ -111,7 +111,7 @@ TEST(THelp, MultiOpts) {
 
     EXPECT_THAT(help, HasSubstr("My prog"));
     EXPECT_THAT(help, Not(HasSubstr("Positionals:")));
-    EXPECT_THAT(help, HasSubstr("Usage: program [OPTIONS]"));
+    EXPECT_THAT(help, HasSubstr("Usage: [OPTIONS]"));
     EXPECT_THAT(help, HasSubstr("INT x 2"));
     EXPECT_THAT(help, HasSubstr("INT ..."));
 }
@@ -128,6 +128,7 @@ TEST(THelp, VectorOpts) {
 
 TEST(THelp, MultiPosOpts) {
     CLI::App app{"My prog"};
+    app.set_name("program");
     std::vector<int> x, y;
     app.add_option("quick", x, "Disc")->expected(2);
     app.add_option("vals", y, "Other");
@@ -243,12 +244,12 @@ TEST(THelp, Subcom) {
     app.add_subcommand("sub2");
 
     std::string help = app.help();
-    EXPECT_THAT(help, HasSubstr("Usage: program [OPTIONS] [SUBCOMMAND]"));
+    EXPECT_THAT(help, HasSubstr("Usage: [OPTIONS] [SUBCOMMAND]"));
 
     app.require_subcommand();
 
     help = app.help();
-    EXPECT_THAT(help, HasSubstr("Usage: program [OPTIONS] SUBCOMMAND"));
+    EXPECT_THAT(help, HasSubstr("Usage: [OPTIONS] SUBCOMMAND"));
 
     help = sub1->help();
     EXPECT_THAT(help, HasSubstr("Usage: sub1"));
@@ -263,6 +264,17 @@ TEST(THelp, Subcom) {
     EXPECT_THAT(help, HasSubstr("Usage: ./myprogram sub2"));
 }
 
+TEST(THelp, MasterName) {
+    CLI::App app{"My prog", "MyRealName"};
+
+    char x[] = "./myprogram";
+
+    std::vector<char *> args = {x};
+    app.parse((int)args.size(), args.data());
+
+    EXPECT_THAT(app.help(), HasSubstr("Usage: MyRealName"));
+}
+
 TEST(THelp, IntDefaults) {
     CLI::App app{"My prog"};