start working on default config gen

14 files changed, 222 insertions, 297 deletions

diff --git a/sample_configs/default_config.toml b/sample_configs/default_config.toml
index 578c33ca..8b137891 100644
--- a/sample_configs/default_config.toml
+++ b/sample_configs/default_config.toml
@@ -1,2 +1 @@
 
-# TODO: FIX THIS
diff --git a/src/constants.rs b/src/constants.rs
index 76c0fd37..26c08c9b 100644
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -257,240 +257,6 @@ pub const DEFAULT_BATTERY_LAYOUT: &str = r#"
     default=true
 "#;
 
-// Config and flags
-pub const DEFAULT_CONFIG_FILE_PATH: &str = "bottom/bottom.toml";
-
-// TODO: Eventually deprecate this, or grab from a file.
-// TODO: FIX THIS!
-pub const CONFIG_TEXT: &str = r#"# This is a default config file for bottom.  All of the settings are commented
-# out by default; if you wish to change them uncomment and modify as you see
-# fit.
-
-# This group of options represents a command-line option.  Flags explicitly
-# added when running (ie: btm -a) will override this config file if an option
-# is also set here.
-[flags]
-# Whether to hide the average cpu entry.
-#hide_avg_cpu = false
-# Whether to use dot markers rather than braille.
-#dot_marker = false
-# The update rate of the application.
-#rate = "1s"
-# Whether to put the CPU legend to the left.
-#left_legend = false
-# Whether to set CPU% on a process to be based on the total CPU or just current usage.
-#current_usage = false
-# Whether to set CPU% on a process to be based on the total CPU or per-core CPU% (not divided by the number of cpus).
-#unnormalized_cpu = false
-# Whether to group processes with the same name together by default.
-#group_processes = false
-# Whether to make process searching case sensitive by default.
-#case_sensitive = false
-# Whether to make process searching look for matching the entire word by default.
-#whole_word = false
-# Whether to make process searching use regex by default.
-#regex = false
-# Defaults to Celsius.  Temperature is one of:
-#temperature_type = "k"
-#temperature_type = "f"
-#temperature_type = "c"
-#temperature_type = "kelvin"
-#temperature_type = "fahrenheit"
-#temperature_type = "celsius"
-# The default time interval (in milliseconds).
-#default_time_value = "60s"
-# The time delta on each zoom in/out action (in milliseconds).
-#time_delta = 15000
-# Hides the time scale.
-#hide_time = false
-# Override layout default widget
-#default_widget_type = "proc"
-#default_widget_count = 1
-# Expand selected widget upon starting the app
-#expanded_on_startup = true
-# Use basic mode
-#basic = false
-# Use the old network legend style
-#use_old_network_legend = false
-# Remove space in tables
-#hide_table_gap = false
-# Show the battery widgets
-#battery = false
-# Disable mouse clicks
-#disable_click = false
-# Built-in themes.  Valid values are "default", "default-light", "gruvbox", "gruvbox-light", "nord", "nord-light"
-#color = "default"
-# Show memory values in the processes widget as values by default
-#mem_as_value = false
-# Show tree mode by default in the processes widget.
-#tree = false
-# Shows an indicator in table widgets tracking where in the list you are.
-#show_table_scroll_position = false
-# Show processes as their commands by default in the process widget.
-#process_command = false
-# Displays the network widget with binary prefixes.
-#network_use_binary_prefix = false
-# Displays the network widget using bytes.
-#network_use_bytes = false
-# Displays the network widget with a log scale.
-#network_use_log = false
-# Hides advanced options to stop a process on Unix-like systems.
-#disable_advanced_kill = false
-# Shows GPU(s) information
-#enable_gpu = false
-# Shows cache and buffer memory
-#enable_cache_memory = false
-# How much data is stored at once in terms of time.
-#retention = "10m"
-
-# These are flags around the process widget.
-#[processes]
-# The columns shown by the process widget. The following columns are supported:
-#   PID, Name, CPU%, Mem%, R/s, W/s, T.Read, T.Write, User, State, Time, GMem%, GPU%
-#columns = ["PID", "Name", "CPU%", "Mem%", "R/s", "W/s", "T.Read", "T.Write", "User", "State", "GMEM%", "GPU%"]
-
-# [cpu]
-# One of "all" (default), "average"/"avg"
-# default = "average"
-
-# These are all the components that support custom theming.  Note that colour support
-# will depend on terminal support.
-#[colors] # Uncomment if you want to use custom colors
-# Represents the colour of table headers (processes, CPU, disks, temperature).
-#table_header_color="LightBlue"
-# Represents the colour of the label each widget has.
-#widget_title_color="Gray"
-# Represents the average CPU color.
-#avg_cpu_color="Red"
-# Represents the colour the core will use in the CPU legend and graph.
-#cpu_core_colors=["LightMagenta", "LightYellow", "LightCyan", "LightGreen", "LightBlue", "LightRed", "Cyan", "Green", "Blue", "Red"]
-# Represents the colour RAM will use in the memory legend and graph.
-#ram_color="LightMagenta"
-# Represents the colour SWAP will use in the memory legend and graph.
-#swap_color="LightYellow"
-# Represents the colour ARC will use in the memory legend and graph.
-#arc_color="LightCyan"
-# Represents the colour the GPU will use in the legend and graph.
-#gpu_core_colors=["LightGreen", "LightBlue", "LightRed", "Cyan", "Green", "Blue", "Red"]
-# Represents the colour rx will use in the network legend and graph.
-#rx_color="LightCyan"
-# Represents the colour tx will use in the network legend and graph.
-#tx_color="LightGreen"
-# Represents the colour of the border of unselected widgets.
-#border_color="Gray"
-# Represents the colour of the border of selected widgets.
-#highlighted_border_color="LightBlue"
-# Represents the colour of most text.
-#text_color="Gray"
-# Represents the colour of text that is selected.
-#selected_text_color="Black"
-# Represents the background colour of text that is selected.
-#selected_bg_color="LightBlue"
-# Represents the colour of the lines and text of the graph.
-#graph_color="Gray"
-# Represents the colours of the battery based on charge
-#high_battery_color="green"
-#medium_battery_color="yellow"
-#low_battery_color="red"
-
-# Layout - layouts follow a pattern like this:
-# [[row]] represents a row in the application.
-# [[row.child]] represents either a widget or a column.
-# [[row.child.child]] represents a widget.
-#
-# All widgets must have the type value set to one of ["cpu", "mem", "proc", "net", "temp", "disk", "empty"].
-# All layout components have a ratio value - if this is not set, then it defaults to 1.
-# The default widget layout:
-#[[row]]
-#  ratio=30
-#  [[row.child]]
-#  type="cpu"
-#[[row]]
-#    ratio=40
-#    [[row.child]]
-#      ratio=4
-#      type="mem"
-#    [[row.child]]
-#      ratio=3
-#      [[row.child.child]]
-#        type="temp"
-#      [[row.child.child]]
-#        type="disk"
-#[[row]]
-#  ratio=30
-#  [[row.child]]
-#    type="net"
-#  [[row.child]]
-#    type="proc"
-#    default=true
-
-
-# Filters - you can hide specific temperature sensors, network interfaces, and disks using filters.  This is admittedly
-# a bit hard to use as of now, and there is a planned in-app interface for managing this in the future:
-#[disk_filter]
-#is_list_ignored = true
-#list = ["/dev/sda\\d+", "/dev/nvme0n1p2"]
-#regex = true
-#case_sensitive = false
-#whole_word = false
-
-#[mount_filter]
-#is_list_ignored = true
-#list = ["/mnt/.*", "/boot"]
-#regex = true
-#case_sensitive = false
-#whole_word = false
-
-#[temp_filter]
-#is_list_ignored = true
-#list = ["cpu", "wifi"]
-#regex = false
-#case_sensitive = false
-#whole_word = false
-
-#[net_filter]
-#is_list_ignored = true
-#list = ["virbr0.*"]
-#regex = true
-#case_sensitive = false
-#whole_word = false
-"#;
-
-pub const CONFIG_TOP_HEAD: &str = r##"# This is bottom's config file.
-# Values in this config file will change when changed in the interface.
-# You can also manually change these values.
-# Be aware that contents of this file will be overwritten if something is
-# changed in the application; you can disable writing via the
-# --no_write flag or no_write config option.
-
-"##;
-
-pub const CONFIG_DISPLAY_OPTIONS_HEAD: &str = r#"
-# These options represent settings that affect how bottom functions.
-# If a setting here corresponds to command-line option, then the flag will temporarily override
-# the setting.
-"#;
-
-pub const CONFIG_COLOUR_HEAD: &str = r#"
-# These options represent colour values for various parts of bottom.  Note that colour support
-# will ultimately depend on the terminal - for example, the Terminal for macOS does NOT like
-# custom colours and it may glitch out.
-"#;
-
-pub const CONFIG_LAYOUT_HEAD: &str = r#"
-# These options represent how bottom will lay out its widgets.  Layouts follow a pattern like this:
-# [[row]] represents a row in the application.
-# [[row.child]] represents either a widget or a column.
-# [[row.child.child]] represents a widget.
-#
-# All widgets must have the valid type value set to one of ["cpu", "mem", "proc", "net", "temp", "disk", "empty"].
-# All layout components have a ratio value - if this is not set, then it defaults to 1.
-"#;
-
-pub const CONFIG_FILTER_HEAD: &str = r#"
-# These options represent disabled entries for the temperature and disk widgets.
-"#;
-
 #[cfg(test)]
 mod test {
     use super::*;
diff --git a/src/options/args.rs b/src/options/args.rs
index ee80a42c..696ee9dd 100644
--- a/src/options/args.rs
+++ b/src/options/args.rs
@@ -30,6 +30,14 @@ const VERSION: &str = match option_env!("NIGHTLY_VERSION") {
     None => crate_version!(),
 };
 
+macro_rules! set_if_some {
+    ($name:ident, $curr:expr, $new:expr) => {
+        if $new.$name.is_some() {
+            $curr.$name = $new.$name.clone();
+        }
+    };
+}
+
 #[derive(Clone, Debug, Deserialize)]
 #[serde(untagged)]
 pub(crate) enum StringOrNum {
@@ -136,6 +144,7 @@ pub(crate) struct GeneralArgs {
                     If it doesn't exist, a default config file is created at the path. If no path is provided,
                     the default config location will be used."
     )]
+    #[serde(skip)]
     pub(crate) config_location: Option<String>,
 
     #[arg(
@@ -143,8 +152,8 @@ pub(crate) struct GeneralArgs {
         long,
         value_name = "TIME",
         help = "Default time value for graphs.",
-        long_help = "The default time value for graphs. Takes a number in milliseconds or a human \
-                    duration (e.g. 60s). The minimum time is 30s, and the default is 60s."
+        long_help = "Default time value for graphs. Either a number in milliseconds or a 'human duration' \
+                    (e.g. 60s, 10m). Defaults to 60s, must be at least 30s."
     )]
     pub(crate) default_time_value: Option<StringOrNum>,
 
@@ -177,6 +186,21 @@ pub(crate) struct GeneralArgs {
     #[arg(
         long,
         value_name = "WIDGET",
+        help = "Sets the default widget type. Use --help for more info.\n", // Newline to force the possible values to be on the next line.
+        long_help = indoc!{
+            "Sets which widget type to use as the default widget. For the default \
+            layout, this defaults to the 'process' widget. For a custom layout, it defaults \
+            to the first widget it sees.
+
+            For example, suppose we have a layout that looks like:
+            +-------------------+-----------------------+
+            |      CPU (1)      |        CPU (2)        |
+            +---------+---------+-------------+---------+
+            | Process | CPU (3) | Temperature | CPU (4) |
+            +---------+---------+-------------+---------+
+
+            Setting '--default_widget_type Temp' will make the temperature widget selected by default."
+        },
         value_parser = [
             "cpu",
             "mem",
@@ -193,21 +217,6 @@ pub(crate) struct GeneralArgs {
             #[cfg(feature = "battery")]
             "battery",
         ],
-        help = "Sets the default widget type. Use --help for more info.\n", // Newline to force the possible values to be on the next line.
-        long_help = indoc!{
-            "Sets which widget type to use as the default widget. For the default \
-            layout, this defaults to the 'process' widget. For a custom layout, it defaults \
-            to the first widget it sees.
-
-            For example, suppose we have a layout that looks like:
-            +-------------------+-----------------------+
-            |      CPU (1)      |        CPU (2)        |
-            +---------+---------+-------------+---------+
-            | Process | CPU (3) | Temperature | CPU (4) |
-            +---------+---------+-------------+---------+
-
-            Setting '--default_widget_type Temp' will make the temperature widget selected by default."
-        }
     )]
     pub(crate) default_widget_type: Option<String>,
 
@@ -237,11 +246,7 @@ pub(crate) struct GeneralArgs {
     #[arg(long, help = "Hides spacing between table headers and entries.")]
     pub(crate) hide_table_gap: Option<bool>,
 
-    #[arg(
-        long,
-        help = "Hides the time scale.",
-        long_help = "Completely hides the time scale from being shown."
-    )]
+    #[arg(long, help = "Hides the time scale from being shown.")]
     pub(crate) hide_time: Option<bool>,
 
     #[arg(
@@ -249,27 +254,23 @@ pub(crate) struct GeneralArgs {
         long,
         value_name = "TIME",
         help = "Sets how often data is refreshed.",
-        long_help = "Sets how often data is refreshed. Takes a number in milliseconds or a human-readable duration \
-                    (e.g. 5s). The minimum is 250ms, and defaults to 1000ms. Smaller values may result in higher \
-                    system usage by bottom."
+        long_help = "Sets how often data is refreshed. Either a number in milliseconds or a 'human duration' \
+                    (e.g. 1s, 1m). Defaults to 1s, must be at least 250ms. Smaller values may result in \
+                    higher system resource usage."
     )]
     pub(crate) rate: Option<StringOrNum>,
 
     #[arg(
         long,
         value_name = "TIME",
-        help = "The timespan of data stored.",
-        long_help = "How much data is stored at once in terms of time. Takes a number in milliseconds or a \
-                    human-readable duration (e.g. 20m), with a minimum of 1 minute. Note that higher values \
-                    will take up more memory. Defaults to 10 minutes."
+        help = "How far back data will be stored up to.",
+        long_help = "How far back data will be stored up to. Either a number in milliseconds or a 'human duration' \
+                    (e.g. 10m, 1h). Defaults to 10 minutes, and must be at least  1 minute. Larger values \
+                    may result in higher memory usage."
     )]
     pub(crate) retention: Option<StringOrNum>,
 
-    #[arg(
-        long,
-        help = "Shows the scroll position tracker in table widgets.",
-        long_help = "Shows the list scroll position tracker in the widget title for table widgets."
-    )]
+    #[arg(long, help = "Show the current item entry position for table widgets.")]
     pub(crate) show_table_scroll_position: Option<bool>,
 
     #[arg(
@@ -277,20 +278,12 @@ pub(crate) struct GeneralArgs {
         long,
         value_name = "TIME",
         help = "The amount of time changed upon zooming.",
-        long_help = "The amount of time changed when zooming in/out. Takes a number in milliseconds or a \
-                    human-readable duration (e.g. 30s). The minimum is 1s, and defaults to 15s."
+        long_help = "How much time the x-axis shifts by each time you zoom in or out. Either a number in milliseconds \
+                    or a 'human duration' (e.g. 15s, 1m). Defaults to 15 seconds."
     )]
     pub(crate) time_delta: Option<StringOrNum>,
 }
 
-macro_rules! set_if_some {
-    ($name:ident, $curr:expr, $new:expr) => {
-        if $new.$name.is_some() {
-            $curr.$name = $new.$name.clone();
-        }
-    };
-}
-
 impl GeneralArgs {
     pub(crate) fn merge(&mut self, other: &Self) {
         set_if_some!(autohide_time, self, other);
@@ -318,7 +311,7 @@ pub(crate) struct ProcessArgs {
         short = 'S',
         long,
         help = "Enables case sensitivity by default.",
-        long_help = "When searching for a process, enables case sensitivity by default."
+        long_help = "Enables case sensitivity by default when searching for a process."
     )]
     pub(crate) case_sensitive: Option<bool>,
 
diff --git a/src/options/config.rs b/src/options/config.rs
index f57d613d..7c2e3d5d 100644
--- a/src/options/config.rs
+++ b/src/options/config.rs
@@ -13,6 +13,7 @@ pub mod temperature;
 
 use std::{fs, io::Write, path::PathBuf};
 
+use indoc::indoc;
 use serde::Deserialize;
 pub use style::*;
 
@@ -27,11 +28,13 @@ use self::{
     memory::MemoryConfig, network::NetworkConfig, process::ProcessConfig,
     temperature::TemperatureConfig,
 };
-use crate::{
-    args::BottomArgs,
-    constants::{CONFIG_TEXT, DEFAULT_CONFIG_FILE_PATH},
-    error,
-};
+use crate::{args::BottomArgs, error};
+
+pub const DEFAULT_CONFIG_FILE_PATH: &str = "bottom/bottom.toml";
+
+pub(crate) trait DefaultConfig {
+    fn default_config() -> String;
+}
 
 #[derive(Debug, Default, Deserialize)]
 pub struct ConfigV2 {
@@ -85,6 +88,34 @@ impl ConfigV2 {
     }
 }
 
+impl DefaultConfig for ConfigV2 {
+    fn default_config() -> String {
+        let mut str = String::default();
+
+        pub const CONFIG_TOP_HEAD: &str = indoc! {"
+            # This is bottom's config file. All of the settings are commented
+            # out by default; if you wish to change them, uncomment and modify the
+            # setting. Make sure to also comment out the relevant section header!
+
+        "};
+
+        str.push_str(CONFIG_TOP_HEAD);
+        str.push_str(&GeneralConfig::default_config());
+        str.push_str(&ProcessConfig::default_config());
+        str.push_str(&TemperatureConfig::default_config());
+        str.push_str(&CpuConfig::default_config());
+        str.push_str(&MemoryConfig::default_config());
+        str.push_str(&NetworkConfig::default_config());
+        #[cfg(feature = "battery")]
+        str.push_str(&BatteryConfig::default_config());
+        #[cfg(feature = "gpu")]
+        str.push_str(&GpuConfig::default_config());
+        str.push_str(&StyleConfig::default_config());
+
+        str
+    }
+}
+
 /// Workaround as per https://github.com/serde-rs/serde/issues/1030
 fn default_as_true() -> bool {
     true
@@ -151,7 +182,8 @@ pub fn create_or_get_config(config_path: &Option<PathBuf>) -> error::Result<Conf
                 fs::create_dir_all(parent_path)?;
             }
 
-            fs::File::create(path)?.write_all(CONFIG_TEXT.as_bytes())?;
+            // TODO: Should this only create if we are on the default path?
+            fs::File::create(path)?.write_all(ConfigV2::default_config().as_bytes())?;
             Ok(ConfigV2::default())
         }
     } else {
diff --git a/src/options/config/battery.rs b/src/options/config/battery.rs
index 6420a02e..4bcbae52 100644
--- a/src/options/config/battery.rs
+++ b/src/options/config/battery.rs
@@ -2,7 +2,15 @@ use serde::Deserialize;
 
 use crate::args::BatteryArgs;
 
+use super::DefaultConfig;
+
 #[derive(Clone, Debug, Default, Deserialize)]
 pub(crate) struct BatteryConfig {
     pub(crate) args: BatteryArgs,
 }
+
+impl DefaultConfig for BatteryConfig {
+    fn default_config() -> String {
+        todo!()
+    }
+}
diff --git a/src/options/config/cpu.rs b/src/options/config/cpu.rs
index 71199704..0976dd6d 100644
--- a/src/options/config/cpu.rs
+++ b/src/options/config/cpu.rs
@@ -1,7 +1,10 @@
+use indoc::indoc;
 use serde::Deserialize;
 
 use crate::args::CpuArgs;
 
+use super::DefaultConfig;
+
 /// The default selection of the CPU widget. If the given selection is invalid, we will fall back to all.
 #[derive(Clone, Copy, Debug, Default, Deserialize)]
 #[serde(rename_all = "lowercase")]
@@ -22,6 +25,16 @@ pub(crate) struct CpuConfig {
     pub(crate) default: CpuDefault,
 }
 
+impl DefaultConfig for CpuConfig {
+    fn default_config() -> String {
+        let s = indoc! {r##"
+        
+        "##};
+
+        s.to_string()
+    }
+}
+
 #[cfg(test)]
 mod test {
     use super::*;
diff --git a/src/options/config/general.rs b/src/options/config/general.rs
index 758c3e08..1721d231 100644
--- a/src/options/config/general.rs
+++ b/src/options/config/general.rs
@@ -1,9 +1,70 @@
+use indoc::indoc;
 use serde::Deserialize;
 
 use crate::args::GeneralArgs;
 
+use super::DefaultConfig;
+
 #[derive(Clone, Debug, Default, Deserialize)]
 pub(crate) struct GeneralConfig {
     #[serde(flatten)]
     pub(crate) args: GeneralArgs,
 }
+
+impl DefaultConfig for GeneralConfig {
+    fn default_config() -> String {
+        let s = indoc! {r##"
+            # Temporarily shows the time scale in graphs. If time is disabled via --hide_time then this will
+            # have no effect.
+            # autohide_time = false
+            
+            # Hides graphs and uses a more basic look.
+            # basic = false
+
+            # Default time value for graphs. Either a number in milliseconds or a 'human duration'
+            # (e.g. "60s", "10m"). Defaults to 60s, and must be at least 30s.
+            # default_time_value = "60s"
+
+            # Sets the n'th selected default widget type as the default. Requires `default_widget_type`
+            # to be set to have any effect.
+            # default_widget_count = 1
+
+            # Sets which widget type to use as the default widget.
+            # default_widget_type = "process"
+
+            # Disables mouse clicks.
+            # disable_click = false
+
+            # Use a dot marker for graphs.
+            # dot_marker = false
+
+            # Expand the default widget upon starting the app. No effect on basic mode.
+            # expanded = false
+
+            # Hides spacing between table headers and entries.
+            # hide_table_gap = false
+
+            # Hides the time scale from being shown.
+            # hide_time = false
+
+            # Sets how often data is refreshed. Either a number in milliseconds or a 'human duration'
+            # (e.g. "1s", "1m"). Defaults to 1s, and must be at least 250ms. Smaller values may result in
+            # higher system resource usage.
+            # rate = "1s"
+
+            # How far back data will be stored up to. Either a number in milliseconds or a 'human duration'
+            # (e.g. "10m", "1h"). Defaults to 10 minutes, and must be at least  1 minute. Larger values
+            # may result in higher memory usage.
+            # retention = "10m"
+
+            # Show the current item entry position for table widgets.
+            # show_table_scroll_position = false
+
+            # How much time the x-axis shifts by each time you zoom in or out. Either a number in milliseconds or
+            # a 'human duration' (e.g. "15s", "1m"). Defaults to 15 seconds.
+            # time_delta = "15s"
+        "##};
+
+        s.to_string()
+    }
+}
diff --git a/src/options/config/gpu.rs b/src/options/config/gpu.rs
index 40b979fa..b71c0fc0 100644
--- a/src/options/config/gpu.rs
+++ b/src/options/config/gpu.rs
@@ -2,6 +2,8 @@ use serde::Deserialize;
 
 use crate::args::GpuArgs;
 
+use super::DefaultConfig;
+
 #[derive(Clone, Debug, Default, Deserialize)]
 pub(crate) struct GpuConfig {
     #[serde(flatten)]
@@ -13,3 +15,9 @@ impl GpuConfig {
         self.args.enable_gpu.unwrap_or(false)
     }
 }
+
+impl DefaultConfig for GpuConfig {
+    fn default_config() -> String {
+        todo!()
+    }
+}
diff --git a/src/options/config/memory.rs b/src/options/config/memory.rs
index c7c6ac8b..5a402085 100644
--- a/src/options/config/memory.rs
+++ b/src/options/config/memory.rs
@@ -2,8 +2,16 @@ use serde::Deserialize;
 
 use crate::args::MemoryArgs;
 
+use super::DefaultConfig;
+
 #[derive(Clone, Debug, Default, Deserialize)]
 pub(crate) struct MemoryConfig {
     #[serde(flatten)]
     pub(crate) args: MemoryArgs,
 }
+
+impl DefaultConfig for MemoryConfig {
+    fn default_config() -> String {
+        todo!()
+    }
+}
diff --git a/src/options/config/network.rs b/src/options/config/network.rs
index 9723b997..0fa18162 100644
--- a/src/options/config/network.rs
+++ b/src/options/config/network.rs
@@ -2,8 +2,16 @@ use serde::Deserialize;
 
 use crate::args::NetworkArgs;
 
+use super::DefaultConfig;
+
 #[derive(Clone, Debug, Default, Deserialize)]
 pub(crate) struct NetworkConfig {
     #[serde(flatten)]
     pub(crate) args: NetworkArgs,
 }
+
+impl DefaultConfig for NetworkConfig {
+    fn default_config() -> String {
+        todo!()
+    }
+}
diff --git a/src/options/config/process.rs b/src/options/config/process.rs
index c48ca044..c4ac66d4 100644
--- a/src/options/config/process.rs
+++ b/src/options/config/process.rs
@@ -1,7 +1,10 @@
+use indoc::indoc;
 use serde::Deserialize;
 
 use crate::{args::ProcessArgs, widgets::ProcWidgetColumn};
 
+use super::DefaultConfig;
+
 /// Process column settings.
 #[derive(Clone, Debug, Default, Deserialize)]
 pub(crate) struct ProcessConfig {
@@ -10,6 +13,17 @@ pub(crate) struct ProcessConfig {
     pub(crate) columns: Option<Vec<ProcWidgetColumn>>,
 }
 
+impl DefaultConfig for ProcessConfig {
+    fn default_config() -> String {
+        let s = indoc! {r##"
+            # Enables case sensitivity by default when searching for a process.
+            # case_sensitive = false
+        "##};
+
+        s.to_string()
+    }
+}
+
 #[cfg(test)]
 mod test {
     use super::ProcessConfig;
diff --git a/src/options/config/style.rs b/src/options/config/style.rs
index 38d93500..6b9f9983 100644
--- a/src/options/config/style.rs
+++ b/src/options/config/style.rs
@@ -5,9 +5,17 @@ use serde::Deserialize;
 
 use crate::args::StyleArgs;
 
+use super::DefaultConfig;
+
 #[derive(Clone, Debug, Default, Deserialize)]
 pub(crate) struct StyleConfig {
     #[serde(flatten)]
     pub(crate) args: StyleArgs,
     // TODO: Maybe also put colours here?
 }
+
+impl DefaultConfig for StyleConfig {
+    fn default_config() -> String {
+        todo!()
+    }
+}
diff --git a/src/options/config/temperature.rs b/src/options/config/temperature.rs
index 7ae359f9..6fce986f 100644
--- a/src/options/config/temperature.rs
+++ b/src/options/config/temperature.rs
@@ -2,9 +2,17 @@ use serde::Deserialize;
 
 use crate::args::TemperatureArgs;
 
+use super::DefaultConfig;
+
 #[derive(Clone, Debug, Default, Deserialize)]
 pub(crate) struct TemperatureConfig {
     #[serde(flatten)]
     pub(crate) args: TemperatureArgs,
     pub(crate) temperature_type: Option<String>,
 }
+
+impl DefaultConfig for TemperatureConfig {
+    fn default_config() -> String {
+        todo!()
+    }
+}
diff --git a/tests/integration/valid_config_tests.rs b/tests/integration/valid_config_tests.rs
index 687a1f4f..f4334223 100644
--- a/tests/integration/valid_config_tests.rs
+++ b/tests/integration/valid_config_tests.rs
@@ -1,9 +1,10 @@
 //! Tests config files that have sometimes caused issues despite being valid.
 
-use std::{io::Read, thread, time::Duration};
+use std::{io::Read, path::Path, thread, time::Duration};
 
 use crate::util::spawn_btm_in_pty;
 
+/// Convert a reader implementing [`Read`] into a string.
 fn reader_to_string(mut reader: Box<dyn Read>) -> String {
     let mut buf = String::default();
     reader.read_to_string(&mut buf).unwrap();
@@ -11,6 +12,7 @@ fn reader_to_string(mut reader: Box<dyn Read>) -> String {
     buf
 }
 
+/// Run bottom with the following args.
 fn run_and_kill(args: &[&str]) {
     let (master, mut handle) = spawn_btm_in_pty(args);
     let reader = master.try_clone_reader().unwrap();
@@ -36,6 +38,13 @@ fn run_and_kill(args: &[&str]) {
     handle.kill().unwrap();
 }
 
+// /// Run the binary with the config path only if the path exists.
+// fn run_if_exists(config_path: &str) {
+//     if Path::new(config_path).exists() {
+//         run_and_kill(&["-C", config_path]);
+//     }
+// }
+
 #[test]
 fn test_basic() {
     run_and_kill(&[]);
@@ -67,13 +76,3 @@ fn test_all_proc() {
 fn test_cpu_doughnut() {
     run_and_kill(&["-C", "./tests/valid_configs/cpu_doughnut.toml"]);
 }
-
-#[test]
-fn test_default() {
-    run_and_kill(&["-C", "./sample_configs/default_config.toml"]);
-}
-
-#[test]
-fn test_demo() {
-    run_and_kill(&["-C", "./sample_configs/demo_config.toml"]);
-}