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commit f50adf19c0842dfb025035e9196ccf5f3e23b8ff
Author: Steve Loughran <ste...@cloudera.com>
AuthorDate: Tue May 10 19:43:13 2022 +0100
HADOOP-18198. update readme
---
README.md | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/README.md b/README.md
index 46c4c27..a2c7295 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,36 @@
This project imports the hadoop client artifacts to verify that they are (a)
published on the maven repository and (b) contain the classes we expect.
+To build and test with the client API:l
+
+```bash
+mvn clean test -Pclient
+```
+
+Compilation verifies the API is present; the
+test verifies that some shaded artifacts are present.
+
+If the hadoop artifacts are in staging/snapshot repositories,
+use the `staging` profile
+
+```bash
+mvn clean test -Pclient -Pstaging
+```
+
+To force an update
+
+```bash
+mvn clean test -Pclient -Pstaging -U
+```
+
+To purge all artifacts of the chosen hadoop version from your local maven
repository.
+
+```bash
+mvn clean -Ppurge
+```
+
+*do not use with the dependency declaration of -Pclient or things get confused*
+(it will try to resolve the artifacts, even as they are deleted)
+
+There are different profiles for different versions;
+the default value is 3.3.3
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