1 | #!/usr/bin/python |
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2 | |
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3 | """Process the Invirt build queue. |
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4 | |
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5 | The Invirtibuilder handles package builds and uploads. On demand, it |
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6 | attempts to build a particular package. |
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7 | |
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8 | If the build succeeds, the new version of the package is uploaded to |
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9 | the apt repository, tagged in its git repository, and the Invirt |
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10 | superrepo is updated to point at the new version. |
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11 | |
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12 | If the build fails, the Invirtibuilder sends mail with the build log. |
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13 | |
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14 | The build queue is tracked via files in /var/lib/invirt-dev/queue. In |
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15 | order to maintain ordering, all filenames in that directory are the |
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16 | timestamp of their creation time. |
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17 | |
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18 | Each queue file contains a file of the form |
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19 | |
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20 | pocket package hash principal |
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21 | |
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22 | where pocket is one of the pockets globally configured in |
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23 | build.pockets. For instance, the pockets in XVM are "prod" and "dev". |
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24 | |
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25 | principal is the Kerberos principal that requested the build. |
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26 | """ |
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27 | |
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28 | |
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29 | from __future__ import with_statement |
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30 | |
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31 | import contextlib |
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32 | import os |
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33 | import re |
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34 | import shutil |
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35 | import subprocess |
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36 | |
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37 | import pyinotify |
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38 | |
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39 | import invirt.builder as b |
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40 | from invirt import database |
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41 | |
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42 | |
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43 | DISTRIBUTION = 'hardy' |
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44 | |
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45 | |
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46 | def getControl(package, ref): |
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47 | """Get the parsed debian/control file for a given package. |
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48 | |
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49 | This returns a list of debian_bundle.deb822.Deb822 objects, one |
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50 | for each section of the debian/control file. Each Deb822 object |
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51 | acts roughly like a dict. |
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52 | """ |
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53 | return deb822.Deb822.iter_paragraphs( |
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54 | getGitFile(package, ref, 'debian/control').split('\n')) |
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55 | |
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56 | |
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57 | def getBinaries(package, ref): |
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58 | """Get a list of binary packages in a package at a given ref.""" |
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59 | return [p['Package'] for p in getControl(package, ref) |
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60 | if 'Package' in p] |
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61 | |
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62 | |
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63 | def getArches(package, ref): |
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64 | """Get the set of all architectures in any binary package.""" |
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65 | arches = set() |
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66 | for section in getControl(package, ref): |
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67 | if 'Architecture' in section: |
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68 | arches.update(section['Architecture'].split()) |
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69 | return arches |
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70 | |
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71 | |
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72 | def getDscName(package, ref): |
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73 | """Return the .dsc file that will be generated for this package.""" |
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74 | v = getVersion(package, ref) |
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75 | if v.debian_version: |
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76 | v_str = '%s-%s' % (v.upstream_version, |
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77 | v.debian_version) |
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78 | else: |
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79 | v_str = v.upstream_version |
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80 | return '%s_%s.dsc' % ( |
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81 | package, |
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82 | v_str) |
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83 | |
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84 | |
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85 | def sanitizeVersion(version): |
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86 | """Sanitize a Debian package version for use as a git tag. |
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87 | |
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88 | This function strips the epoch from the version number and |
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89 | replaces any tildes with periods.""" |
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90 | if v.debian_version: |
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91 | v = '%s-%s' % (version.upstream_version, |
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92 | version.debian_version) |
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93 | else: |
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94 | v = version.upstream_version |
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95 | return v.replace('~', '.') |
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96 | |
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97 | |
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98 | def aptCopy(packages, dst_pocket, src_pocket): |
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99 | """Copy a package from one pocket to another.""" |
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100 | binaries = getBinaries(package, commit) |
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101 | cpatureOutput(['reprepro-env', 'copy', |
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102 | b.pocketToApt(dst_pocket), |
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103 | b.pocketToApt(src_pocket), |
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104 | package] + binaries) |
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105 | |
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106 | |
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107 | def sbuild(package, ref, arch, workdir, arch_all=False): |
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108 | """Build a package for a particular architecture.""" |
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109 | args = ['sbuild', '-d', DISTRIBUTION, '--arch', arch] |
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110 | if arch_all: |
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111 | args.append('-A') |
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112 | args.append(getDscName(package, ref)) |
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113 | c.captureOutput(args, cwd=workdir, stdout=None) |
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114 | |
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115 | |
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116 | def sbuildAll(package, ref, workdir): |
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117 | """Build a package for all architectures it supports.""" |
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118 | arches = getArches(package, ref) |
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119 | if 'all' in arches or 'any' in arches or 'amd64' in arches: |
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120 | sbuild(package, ref, 'amd64', workdir, arch_all=True) |
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121 | if 'any' in arches or 'i386' in arches: |
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122 | sbuild(package, ref, 'i386', workdir) |
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123 | |
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124 | |
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125 | def tagSubmodule(pocket, package, ref, principal): |
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126 | """Tag a new version of a submodule. |
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127 | |
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128 | If this pocket does not allow_backtracking, then this will create |
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129 | a new tag of the version at ref. |
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130 | |
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131 | This function doesn't need to care about lock |
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132 | contention. git-receive-pack updates one ref at a time, and only |
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133 | takes out a lock for that ref after it's passed the update |
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134 | hook. Because we reject pushes to tags in the update hook, no push |
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135 | can ever take out a lock on any tags. |
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136 | |
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137 | I'm sure that long description gives you great confidence in teh |
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138 | legitimacy of my reasoning. |
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139 | """ |
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140 | if config.build.pockets[pocket].get('allow_backtracking', False): |
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141 | env = dict(os.environ) |
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142 | branch = b.pocketToGit(pocket) |
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143 | version = b.getVersion(package, ref) |
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144 | |
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145 | env['GIT_COMMITTER_NAME'] = config.build.tagger.name |
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146 | env['GIT_COMMITTER_EMAIL'] = config.build.tagger.email |
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147 | tag_msg = ('Tag %s of %s\n\n' |
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148 | 'Requested by %s' % (version.full_version, |
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149 | package, |
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150 | principal)) |
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151 | |
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152 | c.captureOutput( |
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153 | ['git', 'tag', '-m', tag_msg, commit], |
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154 | stdout=None, |
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155 | env=env) |
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156 | |
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157 | |
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158 | def updateSubmoduleBranch(pocket, package, ref): |
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159 | """Update the appropriately named branch in the submodule.""" |
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160 | branch = b.pocketToGit(pocket) |
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161 | c.captureOutput( |
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162 | ['git', 'update-ref', 'refs/heads/%s' % branch, ref]) |
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163 | |
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164 | |
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165 | def uploadBuild(pocket, workdir): |
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166 | """Upload all build products in the work directory.""" |
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167 | apt = b.pocketToApt(pocket) |
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168 | for changes in glob.glob(os.path.join(workdir, '*.changes')): |
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169 | c.captureOutput(['reprepro-env', |
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170 | 'include', |
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171 | '--ignore=wrongdistribution', |
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172 | apt, |
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173 | changes]) |
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174 | |
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175 | |
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176 | def updateSuperrepo(pocket, package, commit, principal): |
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177 | """Update the superrepo. |
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178 | |
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179 | This will create a new commit on the branch for the given pocket |
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180 | that sets the commit for the package submodule to commit. |
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181 | |
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182 | Note that there's no locking issue here, because we disallow all |
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183 | pushes to the superrepo. |
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184 | """ |
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185 | superrepo = os.path.join(b._REPO_DIR, 'invirt/packages.git') |
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186 | branch = b.pocketToGit(pocket) |
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187 | tree = c.captureOutput(['git', 'ls-tree', branch], |
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188 | cwd=superrepo) |
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189 | |
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190 | new_tree = re.compile( |
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191 | r'^(160000 commit )[0-9a-f]*(\t%s)$' % package, re.M).sub( |
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192 | r'\1%s\2' % commit, |
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193 | tree) |
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194 | |
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195 | new_tree_id = c.captureOutput(['git', 'mktree'], |
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196 | cwd=superrepo, |
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197 | stdin_str=new_tree) |
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198 | |
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199 | commit_msg = ('Update %s to version %s\n\n' |
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200 | 'Requested by %s' % (package, |
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201 | version.full_version, |
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202 | principal)) |
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203 | new_commit = c.captureOutput( |
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204 | ['git', 'commit-tree', new_tree_hash, '-p', branch], |
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205 | cwd=superrepo, |
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206 | env=env, |
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207 | stdin_str=commit_msg) |
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208 | |
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209 | c.captureOutput( |
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210 | ['git', 'update-ref', 'refs/heads/%s' % branch, new_commit], |
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211 | cwd=superrepo) |
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212 | |
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213 | |
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214 | @contextlib.contextmanager |
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215 | def packageWorkdir(package): |
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216 | """Checkout the package in a temporary working directory. |
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217 | |
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218 | This context manager returns that working directory. The requested |
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219 | package is checked out into a subdirectory of the working |
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220 | directory with the same name as the package. |
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221 | |
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222 | When the context wrapped with this context manager is exited, the |
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223 | working directory is automatically deleted. |
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224 | """ |
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225 | workdir = tempfile.mkdtemp() |
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226 | try: |
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227 | p_archive = subprocess.Popen( |
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228 | ['git', 'archive', |
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229 | '--remote=file://%s' % b.getRepo(package), |
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230 | '--prefix=%s' % package, |
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231 | commit, |
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232 | ], |
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233 | stdout=subprocess.PIPE, |
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234 | ) |
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235 | p_tar = subprocess.Popen( |
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236 | ['tar', '-x'], |
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237 | stdin=p_archive.stdout, |
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238 | cwd=workdir, |
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239 | ) |
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240 | p_archive.wait() |
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241 | p_tar.wait() |
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242 | |
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243 | yield workdir |
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244 | finally: |
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245 | shutil.rmtree(workdir) |
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246 | |
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247 | |
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248 | def reportBuild(build): |
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249 | """Run hooks to report the results of a build attempt.""" |
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250 | |
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251 | c.captureOutput(['run-parts', |
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252 | '--arg=%s' % build.build_id, |
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253 | '--', |
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254 | b._HOOKS_DIR]) |
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255 | |
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256 | |
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257 | def build(): |
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258 | """Deal with items in the build queue. |
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259 | |
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260 | When triggered, iterate over build queue items one at a time, |
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261 | until there are no more pending build jobs. |
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262 | """ |
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263 | while True: |
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264 | stage = 'processing incoming job' |
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265 | queue = os.listdir(b._QUEUE_DIR) |
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266 | if not queue: |
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267 | break |
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268 | |
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269 | build = min(queue) |
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270 | job = open(os.path.join(b._QUEUE_DIR, build)).read().strip() |
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271 | pocket, package, commit, principal = job.split() |
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272 | |
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273 | database.session.begin() |
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274 | db = database.Build() |
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275 | db.package = package |
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276 | db.pocket = pocket |
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277 | db.commit = commit |
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278 | db.principal = principal |
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279 | database.session.save_or_update(db) |
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280 | database.commit() |
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281 | |
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282 | database.begin() |
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283 | |
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284 | try: |
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285 | db.failed_stage = 'validating job' |
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286 | src = validateBuild(pocket, package, commit) |
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287 | |
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288 | db.version = str(b.getVersion(package, commit)) |
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289 | |
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290 | # If validateBuild returns something other than True, then |
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291 | # it means we should copy from that pocket to our pocket. |
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292 | # |
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293 | # (If the validation failed, validateBuild would have |
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294 | # raised an exception) |
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295 | if src != True: |
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296 | db.failed_stage = 'copying package from another pocket' |
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297 | aptCopy(packages, pocket, src) |
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298 | # If we can't copy the package from somewhere, but |
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299 | # validateBuild didn't raise an exception, then we need to |
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300 | # do the build ourselves |
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301 | else: |
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302 | db.failed_stage = 'checking out package source' |
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303 | with packageWorkdir(package) as workdir: |
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304 | db.failed_stage = 'preparing source package' |
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305 | packagedir = os.path.join(workdir, package) |
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306 | |
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307 | # We should be more clever about dealing with |
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308 | # things like non-Debian-native packages than we |
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309 | # are. |
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310 | # |
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311 | # If we were, we could use debuild and get nice |
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312 | # environment scrubbing. Since we're not, debuild |
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313 | # complains about not having an orig.tar.gz |
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314 | c.captureOutput(['dpkg-buildpackage', '-us', '-uc', '-S'], |
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315 | cwd=packagedir, |
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316 | stdout=None) |
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317 | |
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318 | try: |
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319 | db.failed_stage = 'building binary packages' |
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320 | sbuildAll(package, commit, workdir) |
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321 | finally: |
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322 | logdir = os.path.join(b._LOG_DIR, db.build_id) |
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323 | if not os.path.exists(logdir): |
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324 | os.makedirs(logdir) |
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325 | |
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326 | for log in glob.glob(os.path.join(workdir, '*.build')): |
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327 | os.copy2(log, logdir) |
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328 | db.failed_stage = 'tagging submodule' |
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329 | tagSubmodule(pocket, package, commit, principal) |
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330 | db.failed_stage = 'updating submodule branches' |
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331 | updateSubmoduleBranch(pocket, package, commit) |
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332 | db.failed_stage = 'updating superrepo' |
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333 | updateSuperrepo(pocket, package, commit, principal) |
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334 | db.failed_stage = 'uploading packages to apt repo' |
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335 | uploadBuild(pocket, workdir) |
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336 | |
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337 | db.failed_stage = 'cleaning up' |
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338 | |
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339 | # Finally, now that everything is done, remove the |
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340 | # build queue item |
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341 | os.unlink(os.path.join(b._QUEUE_DIR, build)) |
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342 | except: |
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343 | db.traceback = traceback.format_exc() |
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344 | else: |
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345 | db.succeeded = True |
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346 | db.failed_stage = None |
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347 | finally: |
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348 | database.session.save_or_update(db) |
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349 | database.session.commit() |
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350 | |
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351 | reportBuild(db) |
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352 | |
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353 | |
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354 | class Invirtibuilder(pyinotify.ProcessEvent): |
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355 | """Process inotify triggers to build new packages.""" |
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356 | def process_IN_CREATE(self, event): |
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357 | """Handle a created file or directory. |
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358 | |
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359 | When an IN_CREATE event comes in, trigger the builder. |
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360 | """ |
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361 | build() |
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362 | |
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363 | |
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364 | def main(): |
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365 | """Initialize the inotifications and start the main loop.""" |
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366 | database.connect() |
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367 | |
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368 | watch_manager = pyinotify.WatchManager() |
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369 | invirtibuilder = Invirtibuilder() |
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370 | notifier = pyinotify.Notifier(watch_manager, invirtibuilder) |
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371 | watch_manager.add_watch(b._QUEUE_DIR, |
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372 | pyinotify.EventsCodes.ALL_FLAGS['IN_CREATE']) |
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373 | |
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374 | # Before inotifying, run any pending builds; otherwise we won't |
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375 | # get notified for them. |
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376 | build() |
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377 | |
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378 | while True: |
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379 | notifier.process_events() |
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380 | if notifier.check_events(): |
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381 | notifier.read_events() |
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382 | |
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383 | |
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384 | if __name__ == '__main__': |
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385 | main() |
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