Repository file create update and delete support (#215)

* Add create/update/delete Repository files

* Fix create/update verb

src/main/java/org/gitlab/api/GitlabAPI.java

@@ -1458,6 +1458,72 @@ public class GitlabAPI {
         return retrieve().to(tailUrl, GitlabRepositoryFile.class);
     }
 
+    /**
+     * Creates a new file in the repository
+     *
+     * @param project The Project
+     * @param path The file path inside the repository
+     * @param branchName The name of a repository branch
+     * @param commitMsg The commit message
+     * @param content The base64 encoded content of the file
+     * @throws IOException on gitlab api call error
+     */
+    public GitlabSimpleRepositoryFile createRepositoryFile(GitlabProject project, String path, String branchName, String commitMsg, String content) throws IOException {
+        String tailUrl = GitlabProject.URL + "/" + project.getId() + "/repository/files";
+        GitlabHTTPRequestor requestor = dispatch();
+
+        return requestor
+            .with("file_path", sanitizePath(path))
+            .with("branch_name", branchName)
+            .with("encoding", "base64")
+            .with("commit_message", commitMsg)
+            .with("content", content)
+            .to(tailUrl, GitlabSimpleRepositoryFile.class);
+    }
+
+    /**
+     * Updates the content of an existing file in the repository
+     *
+     * @param project The Project
+     * @param path The file path inside the repository
+     * @param branchName The name of a repository branch
+     * @param commitMsg The commit message
+     * @param content The base64 encoded content of the file
+     * @throws IOException on gitlab api call error
+     */
+    public GitlabSimpleRepositoryFile updateRepositoryFile(GitlabProject project, String path, String branchName, String commitMsg, String content) throws IOException {
+        String tailUrl = GitlabProject.URL + "/" + project.getId() + "/repository/files";
+        GitlabHTTPRequestor requestor = retrieve().method("PUT");
+
+        return requestor
+            .with("file_path", sanitizePath(path))
+            .with("branch_name", branchName)
+            .with("encoding", "base64")
+            .with("commit_message", commitMsg)
+            .with("content", content)
+            .to(tailUrl, GitlabSimpleRepositoryFile.class);
+    }
+
+    /**
+     * Deletes an existing file in the repository
+     *
+     * @param project The Project
+     * @param path The file path inside the repository
+     * @param branchName The name of a repository branch
+     * @param commitMsg The commit message
+     * @throws IOException on gitlab api call error
+     */
+    public GitlabSimpleRepositoryFile deleteRepositoryFile(GitlabProject project, String path, String branchName, String commitMsg) throws IOException {
+        String tailUrl = GitlabProject.URL + "/" + project.getId() + "/repository/files";
+        GitlabHTTPRequestor requestor = retrieve().method("DELETE");
+
+        return requestor
+            .with("file_path", sanitizePath(path))
+            .with("branch_name", branchName)
+            .with("commit_message", commitMsg)
+            .to(tailUrl, GitlabSimpleRepositoryFile.class);
+    }
+
     /**
      * Update a Merge Request Note
      *

src/main/java/org/gitlab/api/models/GitlabSimpleRepositoryFile.java

+package org.gitlab.api.models;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class GitlabSimpleRepositoryFile {
+    /*
+   "file_name": "app/project.rb",
+   "branch_name": "master"
+     */
+
+    @JsonProperty("file_name")
+    private String fileName;
+
+    @JsonProperty("branch_name")
+    private String branchName;
+
+    public String getFileName() {
+        return fileName;
+    }
+
+    public void setFileName(String fileName) {
+        this.fileName = fileName;
+    }
+
+    public String getBranchName() {
+        return branchName;
+    }
+
+    public void setBranchName(String branchName) {
+        this.branchName = branchName;
+    }
+}