Ensure full commit id is always available

Update `GitProperties` so that the `commit.id` entry is also copied to
`commit.id.full`.

Prior to this commit, when returning full details, the value of
`commit.id` would be replaced with a `Map` containing only `abbriv` as
a key. By  copying the value to a sub-key we ensure that it remains
available both in the FULL and SIMPLE modes.

Fixes spring-projectsgh-11892

Author: philwebb

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/info/GitInfoContributorTests.java

@@ -22,6 +22,7 @@
 
 import org.junit.Test;
 
+import org.springframework.boot.actuate.info.InfoPropertiesInfoContributor.Mode;
 import org.springframework.boot.info.GitProperties;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -63,4 +64,22 @@ public void shortenCommitId() {
 		assertThat(commit.get("id")).isEqualTo("8e29a0b");
 	}
 
+	@Test
+	@SuppressWarnings("unchecked")
+	public void withGitIdAndAbbrev() {
+		// gh-11892
+		Properties properties = new Properties();
+		properties.put("branch", "master");
+		properties.put("commit.id", "1b3cec34f7ca0a021244452f2cae07a80497a7c7");
+		properties.put("commit.id.abbrev", "1b3cec3");
+		GitInfoContributor contributor = new GitInfoContributor(
+				new GitProperties(properties), Mode.FULL);
+		Map<String, Object> content = contributor.generateContent();
+		Map<String, Object> commit = (Map<String, Object>) content.get("commit");
+		assertThat(commit.get("id")).isInstanceOf(Map.class);
+		Map<String, Object> id = (Map<String, Object>) commit.get("id");
+		assertThat(id.get("full")).isEqualTo("1b3cec34f7ca0a021244452f2cae07a80497a7c7");
+		assertThat(id.get("abbrev")).isEqualTo("1b3cec3");
+	}
+
 }

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/info/GitProperties.java

@@ -80,6 +80,11 @@ public Instant getCommitTime() {
 	private static Properties processEntries(Properties properties) {
 		coercePropertyToEpoch(properties, "commit.time");
 		coercePropertyToEpoch(properties, "build.time");
+		Object commitId = properties.get("commit.id");
+		if (commitId != null) {
+			// Can get converted into a map, so we copy the entry as a nested key
+			properties.put("commit.id.full", commitId);
+		}
 		return properties;
 	}