Example usage for org.eclipse.jgit.diff DiffFormatter getOldPrefix

Introduction

In this page you can find the example usage for org.eclipse.jgit.diff DiffFormatter getOldPrefix.

Prototype

public String getOldPrefix() 

Source Link

Document

Get the prefix applied in front of old file paths.

Usage

From source file:org.eclipse.egit.core.op.CreatePatchOperation.java

License:Open Source License

/**
 * Updates prefixes to workspace paths/*from   ww  w  .  ja  va2  s.  c  om*/
 *
 * @param sb
 * @param diffFmt
 */
public void updateWorkspacePatchPrefixes(StringBuilder sb, DiffFormatter diffFmt) {
    RawText rt = new RawText(sb.toString().getBytes());

    final String oldPrefix = diffFmt.getOldPrefix();
    final String newPrefix = diffFmt.getNewPrefix();

    StringBuilder newSb = new StringBuilder();
    final Pattern diffPattern = Pattern.compile("^diff --git (" + oldPrefix + "(.+)) (" + newPrefix + "(.+))$"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
    final Pattern oldPattern = Pattern.compile("^--- (" + oldPrefix + "(.+))$"); //$NON-NLS-1$ //$NON-NLS-2$
    final Pattern newPattern = Pattern.compile("^\\+\\+\\+ (" + newPrefix + "(.+))$"); //$NON-NLS-1$ //$NON-NLS-2$

    int i = 0;
    while (i < rt.size()) {
        String line = rt.getString(i);

        Matcher diffMatcher = diffPattern.matcher(line);
        Matcher oldMatcher = oldPattern.matcher(line);
        Matcher newMatcher = newPattern.matcher(line);
        if (diffMatcher.find()) {
            String group = diffMatcher.group(2); // old path
            IProject project = getProject(group);
            IPath newPath = computeWorkspacePath(new Path(group), project);
            line = line.replaceAll(diffMatcher.group(1), newPath.toString());
            group = diffMatcher.group(4); // new path
            newPath = computeWorkspacePath(new Path(group), project);
            line = line.replaceAll(diffMatcher.group(3), newPath.toString());
        } else if (oldMatcher.find()) {
            String group = oldMatcher.group(2);
            IProject project = getProject(group);
            IPath newPath = computeWorkspacePath(new Path(group), project);
            line = line.replaceAll(oldMatcher.group(1), newPath.toString());
        } else if (newMatcher.find()) {
            String group = newMatcher.group(2);
            IProject project = getProject(group);
            IPath newPath = computeWorkspacePath(new Path(group), project);
            line = line.replaceAll(newMatcher.group(1), newPath.toString());
        }
        newSb.append(line);

        i++;
        if (i < rt.size() || !rt.isMissingNewlineAtEnd())
            newSb.append(rt.getLineDelimiter());
    }
    // reset sb to newSb
    sb.setLength(0);
    sb.append(newSb);
}

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