| 1 | /** |
| 2 | * |
| 3 | * Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com> |
| 4 | * |
| 5 | * ==================================================================== |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | * ==================================================================== |
| 18 | */ |
| 19 | package org.jclouds.scriptbuilder.domain; |
| 20 | |
| 21 | import static com.google.common.base.Preconditions.checkNotNull; |
| 22 | import static com.google.common.base.Preconditions.checkState; |
| 23 | import static org.jclouds.scriptbuilder.domain.Statements.interpret; |
| 24 | |
| 25 | import java.util.Collections; |
| 26 | import java.util.List; |
| 27 | import java.util.Map; |
| 28 | import java.util.Map.Entry; |
| 29 | import java.util.regex.Pattern; |
| 30 | |
| 31 | import com.google.common.collect.ImmutableList; |
| 32 | import com.google.common.collect.Iterables; |
| 33 | import com.google.common.collect.Lists; |
| 34 | import com.google.common.collect.Maps; |
| 35 | |
| 36 | /** |
| 37 | * Creates a run script |
| 38 | * |
| 39 | * @author Adrian Cole |
| 40 | */ |
| 41 | public class AppendFile implements Statement { |
| 42 | public static final String MARKER = "END_OF_FILE"; |
| 43 | |
| 44 | final String path; |
| 45 | final Iterable<String> lines; |
| 46 | final String marker; |
| 47 | |
| 48 | public AppendFile(String path, Iterable<String> lines) { |
| 49 | this(path, lines, MARKER); |
| 50 | } |
| 51 | |
| 52 | public AppendFile(String path, Iterable<String> lines, String marker) { |
| 53 | this.path = checkNotNull(path, "path"); |
| 54 | this.lines = checkNotNull(lines, "lines"); |
| 55 | this.marker = checkNotNull(marker, "marker"); |
| 56 | checkState(Iterables.size(lines) > 0, "you must pass something to execute"); |
| 57 | } |
| 58 | |
| 59 | public static String escapeVarTokens(String toEscape, OsFamily family) { |
| 60 | Map<String, String> inputToEscape = Maps.newHashMap(); |
| 61 | for (ShellToken token : ImmutableList.of(ShellToken.VARL, ShellToken.VARR)) { |
| 62 | if (!token.to(family).equals("")) { |
| 63 | String tokenS = "{" + token.toString().toLowerCase() + "}"; |
| 64 | inputToEscape.put(tokenS, "{escvar}" + tokenS); |
| 65 | } |
| 66 | } |
| 67 | for (Entry<String, String> entry : inputToEscape.entrySet()) { |
| 68 | toEscape = toEscape.replace(entry.getKey(), entry.getValue()); |
| 69 | } |
| 70 | return toEscape; |
| 71 | } |
| 72 | |
| 73 | @Override |
| 74 | public Iterable<String> functionDependencies(OsFamily family) { |
| 75 | return Collections.emptyList(); |
| 76 | } |
| 77 | |
| 78 | @Override |
| 79 | public String render(OsFamily family) { |
| 80 | List<Statement> statements = Lists.newArrayList(); |
| 81 | if (family == OsFamily.UNIX) { |
| 82 | StringBuilder builder = new StringBuilder(); |
| 83 | hereFile(path, builder); |
| 84 | statements.add(interpret(builder.toString())); |
| 85 | } else { |
| 86 | for (String line : lines) { |
| 87 | statements.add(appendToFile(line, path, family)); |
| 88 | } |
| 89 | } |
| 90 | return new StatementList(statements).render(family); |
| 91 | } |
| 92 | |
| 93 | private void hereFile(String path, StringBuilder builder) { |
| 94 | builder.append("cat >> ").append(path).append(" <<'").append(marker).append("'\n"); |
| 95 | for (String line : lines) { |
| 96 | builder.append(line).append("\n"); |
| 97 | } |
| 98 | builder.append(marker).append("\n"); |
| 99 | } |
| 100 | |
| 101 | private Statement appendToFile(String line, String path, OsFamily family) { |
| 102 | String quote = ""; |
| 103 | if (!ShellToken.VQ.to(family).equals("")) { |
| 104 | quote = "'"; |
| 105 | } else { |
| 106 | line = escapeVarTokens(line, family); |
| 107 | } |
| 108 | return interpret(addSpaceToEnsureWeDontAccidentallyRedirectFd(String.format("echo %s%s%s>>%s{lf}", quote, line, |
| 109 | quote, path))); |
| 110 | } |
| 111 | |
| 112 | public static final Pattern REDIRECT_FD_PATTERN = Pattern.compile(".*[0-2]>>.*"); |
| 113 | |
| 114 | static String addSpaceToEnsureWeDontAccidentallyRedirectFd(String line) { |
| 115 | return REDIRECT_FD_PATTERN.matcher(line).matches() ? line.replace(">>", " >>") : line; |
| 116 | } |
| 117 | |
| 118 | } |