GH 731 review

masq_lib/src/multi_config.rs

@@ -50,6 +50,7 @@ macro_rules! values_m {
 #[derive(Debug)]
 pub struct MultiConfig<'a> {
     arg_matches: ArgMatches<'a>,
+    computed_value_names: HashSet<String>,
 }
 
 impl<'a> MultiConfig<'a> {
@@ -63,9 +64,20 @@ impl<'a> MultiConfig<'a> {
     ) -> Result<MultiConfig<'a>, ConfiguratorError> {
         let initial: Box<dyn VirtualCommandLine> =
             Box::new(CommandLineVcl::new(vec![String::new()]));
-        let merged: Box<dyn VirtualCommandLine> = vcls
+        let mut computed_value_names = HashSet::new();
+        vcls.iter().for_each(|vcl| {
+            vcl.vcl_args().iter().for_each(|vcl_arg| {
+                match vcl.is_computed() {
+                    true => computed_value_names.insert(vcl_arg.name().to_string()),
+                    false => computed_value_names.remove(&vcl_arg.name().to_string()),
+                };
+            })
+        });
+        // TODO pull this out to function to use in determine_user_specific_data
+        let merged = vcls
             .into_iter()
             .fold(initial, |so_far, vcl| merge(so_far, vcl));
+
         let arg_matches = match schema
             .clone()
             .get_matches_from_safe(merged.args().into_iter())
@@ -78,7 +90,10 @@ impl<'a> MultiConfig<'a> {
                 _ => return Err(Self::make_configurator_error(e)),
             },
         };
-        Ok(MultiConfig { arg_matches })
+        Ok(MultiConfig {
+            arg_matches,
+            computed_value_names,
+        })
     }
 
     fn check_for_invalid_value_err(
@@ -139,6 +154,10 @@ impl<'a> MultiConfig<'a> {
         ConfiguratorError::required("<unknown>", &format!("Unfamiliar message: {}", e.message))
     }
 
+    pub fn is_user_specified(&self, value_name: &str) -> bool {
+        !self.computed_value_names.contains(value_name)
+    }
+
     pub fn occurrences_of(&self, parameter: &str) -> u64 {
         self.arg_matches.occurrences_of(parameter)
     }
@@ -150,6 +169,7 @@ impl<'a> MultiConfig<'a> {
 
 pub trait VclArg: Debug {
     fn name(&self) -> &str;
+    fn value_opt(&self) -> Option<&str>;
     fn to_args(&self) -> Vec<String>;
     fn dup(&self) -> Box<dyn VclArg>;
 }
@@ -175,7 +195,9 @@ impl VclArg for NameValueVclArg {
     fn name(&self) -> &str {
         &self.name
     }
-
+    fn value_opt(&self) -> Option<&str> {
+        Some(self.value.as_str())
+    }
     fn to_args(&self) -> Vec<String> {
         vec![self.name.clone(), self.value.clone()]
     }
@@ -203,7 +225,9 @@ impl VclArg for NameOnlyVclArg {
     fn name(&self) -> &str {
         &self.name
     }
-
+    fn value_opt(&self) -> Option<&str> {
+        None
+    }
     fn to_args(&self) -> Vec<String> {
         vec![self.name.clone()]
     }
@@ -224,6 +248,9 @@ impl NameOnlyVclArg {
 pub trait VirtualCommandLine {
     fn vcl_args(&self) -> Vec<&dyn VclArg>;
     fn args(&self) -> Vec<String>;
+    fn is_computed(&self) -> bool {
+        false
+    }
 }
 
 impl Debug for dyn VirtualCommandLine {
@@ -263,6 +290,24 @@ pub fn merge(
     })
 }
 
+pub struct ComputedVcl {
+    vcl_args: Vec<Box<dyn VclArg>>,
+}
+
+impl VirtualCommandLine for ComputedVcl {
+    fn vcl_args(&self) -> Vec<&dyn VclArg> {
+        vcl_args_to_vcl_args(&self.vcl_args)
+    }
+
+    fn args(&self) -> Vec<String> {
+        vcl_args_to_args(&self.vcl_args)
+    }
+
+    fn is_computed(&self) -> bool {
+        true
+    }
+}
+
 pub struct CommandLineVcl {
     vcl_args: Vec<Box<dyn VclArg>>,
 }
@@ -283,6 +328,33 @@ impl From<Vec<Box<dyn VclArg>>> for CommandLineVcl {
     }
 }
 
+impl ComputedVcl {
+    pub fn new(mut args: Vec<String>) -> ComputedVcl {
+        args.remove(0); // remove command
+        let mut vcl_args = vec![];
+        while let Some(vcl_arg) = Self::next_vcl_arg(&mut args) {
+            vcl_args.push(vcl_arg);
+        }
+        ComputedVcl { vcl_args }
+    }
+
+    fn next_vcl_arg(args: &mut Vec<String>) -> Option<Box<dyn VclArg>> {
+        if args.is_empty() {
+            return None;
+        }
+        let name = args.remove(0);
+        if !name.starts_with("--") {
+            panic!("Expected option beginning with '--', not {}", name)
+        }
+        if args.is_empty() || args[0].starts_with("--") {
+            Some(Box::new(NameOnlyVclArg::new(&name)))
+        } else {
+            let value = args.remove(0);
+            Some(Box::new(NameValueVclArg::new(&name, &value)))
+        }
+    }
+}
+
 impl CommandLineVcl {
     pub fn new(mut args: Vec<String>) -> CommandLineVcl {
         args.remove(0); // remove command
@@ -334,7 +406,7 @@ impl EnvironmentVcl {
             .collect();
         let mut vcl_args: Vec<Box<dyn VclArg>> = vec![];
         for (upper_name, value) in std::env::vars() {
-            if (upper_name.len() < 5) || (&upper_name[0..5] != "MASQ_") {
+            if (upper_name.len() < 5) || (&upper_name[0..5] != "MASQ_") || (value == *"") {
                 continue;
             }
             let lower_name = str::replace(&upper_name[5..].to_lowercase(), "_", "-");
@@ -347,10 +419,19 @@ impl EnvironmentVcl {
     }
 }
 
+#[derive(Debug)]
 pub struct ConfigFileVcl {
     vcl_args: Vec<Box<dyn VclArg>>,
 }
 
+impl Clone for ConfigFileVcl {
+    fn clone(&self) -> Self {
+        ConfigFileVcl {
+            vcl_args: self.vcl_args.iter().map(|arg| arg.dup()).collect(),
+        }
+    }
+}
+
 impl VirtualCommandLine for ConfigFileVcl {
     fn vcl_args(&self) -> Vec<&dyn VclArg> {
         vcl_args_to_vcl_args(&self.vcl_args)
@@ -491,8 +572,14 @@ fn append<T>(ts: Vec<T>, t: T) -> Vec<T> {
 
 #[cfg(not(feature = "no_test_share"))]
 impl<'a> MultiConfig<'a> {
-    pub fn new_test_only(arg_matches: ArgMatches<'a>) -> Self {
-        Self { arg_matches }
+    pub fn new_test_only(
+        arg_matches: ArgMatches<'a>,
+        computed_value_names: HashSet<String>,
+    ) -> Self {
+        Self {
+            arg_matches,
+            computed_value_names,
+        }
     }
 }
 
@@ -504,6 +591,7 @@ pub mod tests {
     use clap::Arg;
     use std::fs::File;
     use std::io::Write;
+    use std::ops::Deref;
 
     #[test]
     fn config_file_vcl_error_displays_open_error() {
@@ -949,6 +1037,40 @@ pub mod tests {
         assert_eq!(subject.args(), command_line);
     }
 
+    #[test]
+    fn command_line_vcl_return_value_from_vcl_args_by_name() {
+        let command_line: Vec<String> = vec![
+            "",
+            "--first-value",
+            "/nonexistent/directory",
+            "--takes_no_value",
+            "--other_takes_no_value",
+        ]
+        .into_iter()
+        .map(|s| s.to_string())
+        .collect();
+
+        let subject = CommandLineVcl::new(command_line.clone());
+        let existing_value = match subject
+            .vcl_args
+            .iter()
+            .find(|vcl_arg_box| vcl_arg_box.deref().name() == "--first-value")
+        {
+            Some(vcl_arg_box) => vcl_arg_box.deref().value_opt(),
+            None => None,
+        };
+        let non_existing_value = match subject
+            .vcl_args
+            .iter()
+            .find(|vcl_arg_box| vcl_arg_box.deref().name() == "--takes_no_value")
+        {
+            Some(vcl_arg_box) => vcl_arg_box.deref().value_opt(),
+            None => None,
+        };
+        assert_eq!(existing_value.unwrap(), "/nonexistent/directory");
+        assert_eq!(non_existing_value, None);
+    }
+
     #[test]
     #[should_panic(expected = "Expected option beginning with '--', not value")]
     fn command_line_vcl_panics_when_given_value_without_name() {
@@ -963,12 +1085,19 @@ pub mod tests {
     #[test]
     fn environment_vcl_works() {
         let _guard = EnvironmentGuard::new();
-        let schema = App::new("test").arg(
-            Arg::with_name("numeric-arg")
-                .long("numeric-arg")
-                .takes_value(true),
-        );
+        let schema = App::new("test")
+            .arg(
+                Arg::with_name("numeric-arg")
+                    .long("numeric-arg")
+                    .takes_value(true),
+            )
+            .arg(
+                Arg::with_name("empty-arg")
+                    .long("empty-arg")
+                    .takes_value(true),
+            );
         std::env::set_var("MASQ_NUMERIC_ARG", "47");
+        std::env::set_var("MASQ_EMPTY_ARG", "");
 
         let subject = EnvironmentVcl::new(&schema);
 

node/src/daemon/setup_reporter.rs

@@ -18,7 +18,7 @@ use crate::node_configurator::unprivileged_parse_args_configuration::{
     UnprivilegedParseArgsConfigurationDaoReal,
 };
 use crate::node_configurator::{
-    data_directory_from_context, determine_fundamentals, DirsWrapper, DirsWrapperReal,
+    data_directory_from_context, determine_user_specific_data, DirsWrapper, DirsWrapperReal,
 };
 use crate::sub_lib::accountant::PaymentThresholds as PaymentThresholdsFromAccountant;
 use crate::sub_lib::accountant::DEFAULT_SCAN_INTERVALS;
@@ -495,9 +495,12 @@ impl SetupReporterReal {
                 Some(command_line) => command_line,
                 None => vec![],
             };
-            let (config_file_path, user_specified, _data_directory, _real_user) =
-                determine_fundamentals(dirs_wrapper, &app, &command_line)?;
-            let config_file_vcl = match ConfigFileVcl::new(&config_file_path, user_specified) {
+            let user_specific_data =
+                determine_user_specific_data(dirs_wrapper, &app, &command_line)?;
+            let config_file_vcl = match ConfigFileVcl::new(
+                &user_specific_data.config_file,
+                user_specific_data.config_file_spec,
+            ) {
                 Ok(cfv) => cfv,
                 Err(e) => return Err(ConfiguratorError::required("config-file", &e.to_string())),
             };