io.swagger.codegen.ignore.CodegenIgnoreProcessor Maven / Gradle / Ivy
package io.swagger.codegen.ignore;
import com.google.common.collect.ImmutableList;
import io.swagger.codegen.ignore.rules.DirectoryRule;
import io.swagger.codegen.ignore.rules.Rule;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.*;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
/**
* Presents a processing utility for parsing and evaluating files containing common ignore patterns. (.swagger-codegen-ignore)
*/
public class CodegenIgnoreProcessor {
private static final Logger LOGGER = LoggerFactory.getLogger(CodegenIgnoreProcessor.class);
private File ignoreFile = null;
private List exclusionRules = new ArrayList<>();
private List inclusionRules = new ArrayList<>();
/**
* Loads the default ignore file (.swagger-codegen-ignore) from the specified path.
*
* @param baseDirectory The base directory of the files to be processed. This contains the ignore file.
*/
public CodegenIgnoreProcessor(final String baseDirectory) {
this(baseDirectory, ".swagger-codegen-ignore");
}
/**
* Loads the specified ignore file by name ([ignoreFile]) from the specified path.
*
* @param baseDirectory The base directory of the files to be processed. This contains the ignore file.
* @param ignoreFile The file containing ignore patterns.
*/
@SuppressWarnings("WeakerAccess")
public CodegenIgnoreProcessor(final String baseDirectory, final String ignoreFile) {
final File directory = new File(baseDirectory);
final File targetIgnoreFile = new File(directory, ignoreFile);
if (directory.exists() && directory.isDirectory()) {
loadFromFile(targetIgnoreFile);
} else {
LOGGER.warn("Output directory does not exist, or is inaccessible. No file (.swagger-codegen-ignore) will be evaluated.");
}
}
/**
* Constructs an instance of {@link CodegenIgnoreProcessor} from an ignore file defined by {@code targetIgnoreFile}.
*
* @param targetIgnoreFile The ignore file location.
*/
public CodegenIgnoreProcessor(final File targetIgnoreFile) {
loadFromFile(targetIgnoreFile);
}
private void loadFromFile(File targetIgnoreFile) {
if (targetIgnoreFile.exists() && targetIgnoreFile.isFile()) {
try {
loadCodegenRules(targetIgnoreFile);
this.ignoreFile = targetIgnoreFile;
} catch (IOException e) {
LOGGER.error(String.format("Could not process %s.", targetIgnoreFile.getName()), e.getMessage());
}
} else {
// log info message
LOGGER.info(String.format("No %s file found.", targetIgnoreFile.getName()));
}
}
void loadCodegenRules(final File codegenIgnore) throws IOException {
try (BufferedReader reader = new BufferedReader(new FileReader(codegenIgnore))) {
String line;
// NOTE: Comments that start with a : (e.g. //:) are pulled from git documentation for .gitignore
// see: https://github.com/git/git/blob/90f7b16b3adc78d4bbabbd426fb69aa78c714f71/Documentation/gitignore.txt
while ((line = reader.readLine()) != null) {
if(
//: A blank line matches no files, so it can serve as a separator for readability.
line.length() == 0
) continue;
Rule rule = Rule.create(line);
// rule could be null here if it's a COMMENT, for example
if(rule != null) {
if (Boolean.TRUE.equals(rule.getNegated())) {
inclusionRules.add(rule);
} else {
exclusionRules.add(rule);
}
}
}
}
}
/**
* Determines whether or not a file defined by {@code toEvaluate} is allowed,
* under the exclusion rules from the ignore file being processed.
*
* @param targetFile The file to check against exclusion rules from the ignore file.
* @return {@code false} if file matches any pattern in the ignore file (disallowed), otherwise {@code true} (allowed).
*/
public boolean allowsFile(final File targetFile) {
if(this.ignoreFile == null) return true;
File file = new File(this.ignoreFile.getParentFile().toURI().relativize(targetFile.toURI()).getPath());
Boolean directoryExcluded = false;
Boolean exclude = false;
if(exclusionRules.size() == 0 && inclusionRules.size() == 0) {
return true;
}
// NOTE: We *must* process all exclusion rules
for (int i = 0; i < exclusionRules.size(); i++) {
Rule current = exclusionRules.get(i);
Rule.Operation op = current.evaluate(file.getPath());
switch (op){
case EXCLUDE:
exclude = true;
// Include rule can't override rules that exclude a file by some parent directory.
if(current instanceof DirectoryRule) {
directoryExcluded = true;
}
break;
case INCLUDE:
// This won't happen here.
break;
case NOOP:
break;
case EXCLUDE_AND_TERMINATE:
i = exclusionRules.size();
break;
}
}
if(exclude) {
// Only need to process inclusion rules if we've been excluded
for (int i = 0; exclude && i < inclusionRules.size(); i++) {
Rule current = inclusionRules.get(i);
Rule.Operation op = current.evaluate(file.getPath());
// At this point exclude=true means the file should be ignored.
// op == INCLUDE means we have to flip that flag.
if(op.equals(Rule.Operation.INCLUDE)) {
if(current instanceof DirectoryRule && directoryExcluded) {
// e.g
// baz/
// !foo/bar/baz/
// NOTE: Possibly surprising side effect:
// foo/bar/baz/
// !bar/
exclude = false;
} else if (!directoryExcluded) {
// e.g.
// **/*.log
// !ISSUE_1234.log
exclude = false;
}
}
}
}
return Boolean.FALSE.equals(exclude);
}
/**
* Allows a consumer to manually inspect explicit "inclusion rules". That is, patterns in the ignore file which have been negated.
*
* @return A {@link ImmutableList#copyOf(Collection)} of rules which possibly negate exclusion rules in the ignore file.
*/
public List getInclusionRules() {
return ImmutableList.copyOf(inclusionRules);
}
/**
* Allows a consumer to manually inspect all "exclusion rules". That is, patterns in the ignore file which represent
* files and directories to be excluded, unless explicitly overridden by {@link CodegenIgnoreProcessor#getInclusionRules()} rules.
*
* NOTE: Existence in this list doesn't mean a file is excluded. The rule can be overridden by {@link CodegenIgnoreProcessor#getInclusionRules()} rules.
*
* @return A {@link ImmutableList#copyOf(Collection)} of rules which define exclusions by patterns in the ignore file.
*/
public List getExclusionRules() {
return ImmutableList.copyOf(exclusionRules);
}
}