Tweak output

buildpacks/gradle/src/main.rs

@@ -6,8 +6,10 @@ use crate::gradle_command::GradleCommandError;
 use crate::layers::gradle_home::handle_gradle_home_layer;
 use crate::GradleBuildpackError::{GradleBuildIoError, GradleBuildUnexpectedStatusError};
 use buildpacks_jvm_shared as shared;
+use buildpacks_jvm_shared::output;
 use buildpacks_jvm_shared::output::{
-    print_buildpack_name, print_section, print_subsection, track_timing,
+    print_buildpack_name, print_section, print_subsection, track_timing, BuildpackOutputText,
+    BuildpackOutputTextSection,
 };
 #[cfg(test)]
 use buildpacks_jvm_shared_test as _;
@@ -20,7 +22,6 @@ use libcnb::{buildpack_main, Buildpack, Env};
 #[cfg(test)]
 use libcnb_test as _;
 use libherokubuildpack::command::CommandExt;
-use libherokubuildpack::log::log_header;
 use serde::Deserialize;
 use std::io::{stderr, stdout};
 use std::process::{Command, ExitStatus};
@@ -126,7 +127,11 @@ impl Buildpack for GradleBuildpack {
             })
             .ok_or(GradleBuildpackError::BuildTaskUnknown)?;
 
-        log_header("Running build task");
+        print_section("Running Gradle build");
+        print_subsection(BuildpackOutputText::new(vec![
+            BuildpackOutputTextSection::regular("Running "),
+            BuildpackOutputTextSection::command(format!("./gradlew {} -x check", task_name)),
+        ]));
 
         let output = Command::new(&gradle_wrapper_executable_path)
             .current_dir(&context.app_dir)

buildpacks/jvm/src/layers/openjdk.rs

@@ -191,7 +191,7 @@ pub(crate) fn handle_openjdk_layer(
                 )
                 .map_err(OpenJdkBuildpackError::CannotSymlinkUbuntuCertificates)?;
 
-                output::print_subsection("Done.");
+                output::print_subsection("Done");
             } else {
                 output::print_subsection(BuildpackOutputText::new(vec![
                     BuildpackOutputTextSection::regular("Skipping ("),

buildpacks/maven/src/main.rs

@@ -212,7 +212,7 @@ impl Buildpack for MavenBuildpack {
         output::print_section("Running Maven build");
         output::print_subsection(BuildpackOutputText::new(vec![
             BuildpackOutputTextSection::regular("Running "),
-            BuildpackOutputTextSection::value(format!(
+            BuildpackOutputTextSection::command(format!(
                 "{} {} {}",
                 mvn_executable.to_string_lossy(),
                 shell_words::join(&maven_options),

buildpacks/sbt/src/main.rs

@@ -109,7 +109,7 @@ impl Buildpack for SbtBuildpack {
             output::print_section("Running sbt build");
             output::print_subsection(BuildpackOutputText::new(vec![
                 BuildpackOutputTextSection::regular("Running "),
-                BuildpackOutputTextSection::value(format!("sbt {}", shell_words::join(&tasks))),
+                BuildpackOutputTextSection::command(format!("sbt {}", shell_words::join(&tasks))),
             ]));
 
             let mut command = Command::new("sbt");

shared/src/output.rs

@@ -5,7 +5,7 @@ use std::time::{Duration, Instant};
 
 pub fn print_buildpack_name(buildpack_name: impl AsRef<str>) {
     let buildpack_name = buildpack_name.as_ref();
-    println!("{ANSI_BUILDPACK_NAME_CODE}# {buildpack_name}{ANSI_RESET_CODE}\n");
+    print!("\n{ANSI_BUILDPACK_NAME_CODE}# {buildpack_name}{ANSI_RESET_CODE}\n\n");
 }
 
 pub fn print_section(text: impl Into<BuildpackOutputText>) {
@@ -71,10 +71,19 @@ pub fn run_command<E, F: FnOnce(std::io::Error) -> E, F2: FnOnce(Output) -> E>(
     let child = if quiet {
         command.output_and_write_streams(std::io::sink(), std::io::sink())
     } else {
-        command.output_and_write_streams(
-            line_mapped(std::io::stdout(), add_prefix_to_non_empty("    ")),
-            line_mapped(std::io::stderr(), add_prefix_to_non_empty("    ")),
-        )
+        const SPACE_ASCII: u8 = 0x20;
+        let prefix = vec![SPACE_ASCII; 6];
+
+        print!("\n");
+
+        let output = command.output_and_write_streams(
+            line_mapped(std::io::stdout(), add_prefix_to_non_empty(prefix.clone())),
+            line_mapped(std::io::stderr(), add_prefix_to_non_empty(prefix)),
+        );
+
+        print!("\n");
+
+        output
     };
 
     child.map_err(io_error_fn).and_then(|output| {
@@ -222,6 +231,10 @@ impl BuildpackOutputTextSection {
     pub fn value(value: impl Into<String>) -> Self {
         BuildpackOutputTextSection::Value(value.into())
     }
+
+    pub fn command(value: impl Into<String>) -> Self {
+        BuildpackOutputTextSection::Command(value.into())
+    }
 }
 
 impl From<String> for BuildpackOutputText {
@@ -283,12 +296,12 @@ fn format_duration(duration: &Duration) -> String {
 
 const VALUE_DELIMITER_CHAR: char = '`';
 const ANSI_RESET_CODE: &str = "\u{1b}[0m";
-const ANSI_VALUE_CODE: &str = "\u{1b}[0;34m";
+const ANSI_VALUE_CODE: &str = "\u{1b}[0;33m";
 const ANSI_YELLOW_CODE: &str = "\u{1b}[0;33m";
 const ANSI_RED_CODE: &str = "\u{1b}[0;31m";
 const ANSI_BUILDPACK_NAME_CODE: &str = "\u{1b}[1;35m";
 const ANSI_URL_CODE: &str = "\u{1b}[0;34m";
-const ANSI_COMMAND_CODE: &str = "\u{1b}[0;34m";
+const ANSI_COMMAND_CODE: &str = "\u{1b}[1;36m";
 const ERROR_WARNING_LINE_PREFIX: &str = "! ";
 
 #[cfg(test)]
@@ -311,7 +324,7 @@ mod test {
             ..Default::default()
         };
 
-        assert_eq!(text.to_ansi_string(), "\u{1b}[0m\u{1b}[0;33m! Hello\u{1b}[0m\n\u{1b}[0m\u{1b}[0;33m! `\u{1b}[0;34mWorld\u{1b}[0m`\u{1b}[0;33m\u{1b}[0m\n\u{1b}[0m\u{1b}[0;33m! How\u{1b}[0m\n\u{1b}[0m\u{1b}[0;33m! are you?");
+        assert_eq!(text.to_ansi_string(), "\u{1b}[0m\u{1b}[0;33m! Hello\u{1b}[0m\n\u{1b}[0m\u{1b}[0;33m! `\u{1b}[0;33mWorld\u{1b}[0m`\u{1b}[0;33m\u{1b}[0m\n\u{1b}[0m\u{1b}[0;33m! How\u{1b}[0m\n\u{1b}[0m\u{1b}[0;33m! are you?");
     }
 
     #[test]
@@ -329,7 +342,7 @@ mod test {
 
         assert_eq!(
             text.to_ansi_string(),
-            "\u{1b}[0m\u{1b}[0;33m! Intro\u{1b}[0m\n\u{1b}[0m\u{1b}[0;33m! `\u{1b}[0;34mWith\u{1b}[0m\n\u{1b}[0m\u{1b}[0;33m! \u{1b}[0;34mNewline\u{1b}[0m`\u{1b}[0;33m\u{1b}[0m\n\u{1b}[0m\u{1b}[0;33m! Outro"
+            "\u{1b}[0m\u{1b}[0;33m! Intro\u{1b}[0m\n\u{1b}[0m\u{1b}[0;33m! `\u{1b}[0;33mWith\u{1b}[0m\n\u{1b}[0m\u{1b}[0;33m! \u{1b}[0;33mNewline\u{1b}[0m`\u{1b}[0;33m\u{1b}[0m\n\u{1b}[0m\u{1b}[0;33m! Outro"
         );
     }