feat: Implement the prompt module for jobs (#85)

src/init.rs

@@ -58,7 +58,7 @@ https://github.com/starship/starship/issues/124
 
 const BASH_INIT: &str = r##"
 starship_precmd() {
-        PS1="$(starship prompt --status=$?)";
+        PS1="$(starship prompt --status=$? --jobs=$(jobs -p | wc -l))";
 };
 PROMPT_COMMAND=starship_precmd;
 "##;
@@ -83,10 +83,10 @@ starship_precmd() {
     if [[ $STARSHIP_START_TIME ]]; then
         STARSHIP_END_TIME="$(date +%s)";
         STARSHIP_DURATION=$((STARSHIP_END_TIME - STARSHIP_START_TIME));
-        PROMPT="$(starship prompt --status=$STATUS --cmd-duration=$STARSHIP_DURATION)";
+        PROMPT="$(starship prompt --status=$STATUS --cmd-duration=$STARSHIP_DURATION --jobs=$(jobs | wc -l))";
         unset STARSHIP_START_TIME;
     else
-        PROMPT="$(starship prompt --status=$STATUS)";
+        PROMPT="$(starship prompt --status=$STATUS --jobs=$(jobs | wc -l))";
     fi
 };
 starship_preexec(){
@@ -108,6 +108,6 @@ function fish_prompt;
     set -l exit_code $status;
     set -l CMD_DURATION "$CMD_DURATION$cmd_duration";
     set -l starship_duration (math --scale=0 "$CMD_DURATION / 1000");
-    starship prompt --status=$exit_code --cmd-duration=$starship_duration;
+    starship prompt --status=$exit_code --cmd-duration=$starship_duration --jobs=(count (jobs -p));
 end;
 "##;

src/main.rs

@@ -43,6 +43,13 @@ fn main() {
         .help("The execution duration of the last command, in seconds")
         .takes_value(true);
 
+    let jobs_arg = Arg::with_name("jobs")
+        .short("j")
+        .long("jobs")
+        .value_name("JOBS")
+        .help("The number of currently running jobs")
+        .takes_value(true);
+
     let matches = App::new("starship")
         .about("The cross-shell prompt for astronauts. ☄🌌️")
         // pull the version number from Cargo.toml
@@ -61,7 +68,8 @@ fn main() {
                 .about("Prints the full starship prompt")
                 .arg(&status_code_arg)
                 .arg(&path_arg)
-                .arg(&cmd_duration_arg),
+                .arg(&cmd_duration_arg)
+                .arg(&jobs_arg),
         )
         .subcommand(
             SubCommand::with_name("module")
@@ -73,7 +81,8 @@ fn main() {
                 )
                 .arg(&status_code_arg)
                 .arg(&path_arg)
-                .arg(&cmd_duration_arg),
+                .arg(&cmd_duration_arg)
+                .arg(&jobs_arg),
         )
         .get_matches();
 

src/modules/jobs.rs

@@ -0,0 +1,32 @@
+use ansi_term::Color;
+
+use super::{Context, Module};
+
+/// Creates a segment to show if there are any active jobs running
+pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
+    let mut module = context.new_module("jobs")?;
+
+    let threshold = module.config_value_i64("threshold").unwrap_or(1);
+
+    const JOB_CHAR: &str = "✦";
+    let module_color = Color::Blue.bold();
+
+    module.set_style(module_color);
+
+    let arguments = &context.arguments;
+    let num_of_jobs = arguments
+        .value_of("jobs")
+        .unwrap_or("0")
+        .parse::<i64>()
+        .ok()?;
+    if num_of_jobs == 0 {
+        return None;
+    }
+    module.new_segment("symbol", JOB_CHAR);
+    if num_of_jobs > threshold {
+        module.new_segment("number", &num_of_jobs.to_string());
+    }
+    module.get_prefix().set_value("");
+
+    Some(module)
+}

src/modules/mod.rs

@@ -5,6 +5,7 @@ mod directory;
 mod git_branch;
 mod git_status;
 mod golang;
+mod jobs;
 mod line_break;
 mod nodejs;
 mod package;
@@ -30,6 +31,7 @@ pub fn handle<'a>(module: &str, context: &'a Context) -> Option<Module<'a>> {
         "username" => username::module(context),
         "battery" => battery::module(context),
         "cmd_duration" => cmd_duration::module(context),
+        "jobs" => jobs::module(context),
 
         _ => panic!("Unknown module: {}", module),
     }

src/print.rs

@@ -19,6 +19,7 @@ const PROMPT_ORDER: &[&str] = &[
     "go",
     "cmd_duration",
     "line_break",
+    "jobs",
     "battery",
     "character",
 ];