1 """Invirt build utilities.
3 This module contains utility functions used by both the invirtibuilder
4 and the remctl submission scripts that insert items into its queue.
10 from debian_bundle import changelog
11 from debian_bundle import deb822
13 import invirt.common as c
14 from invirt.config import structs as config
17 _QUEUE_DIR = '/var/lib/invirt-dev/queue'
18 _REPO_DIR = '/srv/git'
19 _LOG_DIR = '/var/log/invirt/builds'
20 _HOOKS_DIR = '/usr/share/invirt-dev/build.d'
23 class InvalidBuild(ValueError):
28 """Return the path to the git repo for a given package."""
29 return os.path.join(_REPO_DIR, 'packages', '%s.git' % package)
32 def pocketToGit(pocket):
33 """Map a pocket in the configuration to a git branch."""
34 return config.git.pockets[pocket].get('git', pocket)
37 def pocketToApt(pocket):
38 """Map a pocket in the configuration to an apt repo pocket."""
39 return config.git.pockets[pocket].get('apt', pocket)
42 def getGitFile(package, ref, path):
43 """Return the contents of a path from a git ref in a package."""
44 return c.captureOutput(['git', 'cat-file', 'blob', '%s:%s' % (ref, path)],
48 def getChangelog(package, ref):
49 """Get a changelog object for a given ref in a given package.
51 This returns a debian_bundle.changelog.Changelog object for a
52 given ref of a given package.
54 return changelog.Changelog(getGitFile(package, ref, 'debian/changelog'))
57 def getVersion(package, ref):
58 """Get the version of a given package at a particular ref."""
59 return getChangelog(package, ref).get_version()
62 def validateBuild(pocket, package, commit):
63 """Given the parameters of a new build, validate that build.
65 The checks this function performs vary based on whether or not the
66 pocket is configured with allow_backtracking.
68 A build of a pocket without allow_backtracking set must be a
69 fast-forward of the previous revision, and the most recent version
70 in the changelog most be strictly greater than the version
71 currently in the repository.
73 In all cases, this revision of the package can only have the same
74 version number as any other revision currently in the apt
75 repository if they have the same commit ID.
77 If it's unspecified, it is assumed that pocket do not
80 If this build request fails validation, this function will raise a
81 InvalidBuild exception, with information about why the validation
84 If this build request can be satisfied by copying the package from
85 another pocket, then this function returns that pocket. Otherwise,
88 package_repo = getRepo(package)
89 new_version = getVersion(package, commit)
91 for p in config.git.pockets:
96 current_commit = c.captureOutput(['git', 'rev-parse', b],
98 current_version = getVersion(package, b)
100 if current_version == new_version:
101 if current_commit == commit:
104 raise InvalidBuild('Version %s of %s already available in '
105 'pocket %s from commit %s' %
106 (new_version, package, p, current_commit))
108 if config.git.pockets[pocket].get('allow_backtracking', False):
109 branch = pocketToGit(pocket)
110 current_version = getVersion(package, branch)
111 if new_version <= current_version:
112 raise InvalidBuild('New version %s of %s is not newer than '
113 'version %s currently in pocket %s' %
114 (new_version, package, current_version, pocket))
116 # Almost by definition, A is a fast-forward of B if B..A is
118 if not c.captureOutput(['git', 'rev-list', '%s..%s' % (commit, branch)]):
119 raise InvalidBuild('New commit %s of %s is not a fast-forward of'
120 'commit currently in pocket %s' %
121 (commit, package, pocket))