import optparse
import sys
+import distutils.version
import os
import shutil
import logging.handlers
import errno
import tempfile
+import itertools
-from wizard import command, deploy, shell, util
+from wizard import app, command, deploy, shell, util
-# XXX: WARNING EXPERIMENTAL DANGER DANGER WILL ROBINSON
+def main(argv, baton):
+ options, args = parse_args(argv, baton)
+ if args:
+ dir = args[0]
+ else:
+ dir = "."
+ shell.drop_priviledges(dir, options.log_file)
+ util.chdir(dir)
+ if os.path.exists(".scripts/blacklisted"):
+ raise BlacklistedError()
+ sh = shell.Shell()
+ util.set_git_env()
+ if options.continue_:
+ temp_wc_dir = os.getcwd()
+ user_commit, next_commit = open(".git/WIZARD_PARENTS", "r").read().split()
+ repo = open(".git/WIZARD_REPO", "r").read()
+ version = open(".git/WIZARD_UPGRADE_VERSION", "r").read()
+ util.chdir(sh.eval("git", "config", "remote.origin.url"))
+ d = deploy.Deployment(".")
+ try:
+ sh.call("git", "status")
+ raise LocalChangesError()
+ except shell.CallError:
+ pass
+ else:
+ d = deploy.Deployment(".")
+ d.verify()
+ d.verifyTag(options.srv_path)
+ d.verifyGit(options.srv_path)
+ d.verifyConfigured()
+ d.verifyVersion()
+ if not options.dry_run:
+ d.verifyWeb()
+ repo = d.application.repository(options.srv_path)
+ version = calculate_newest_version(sh, repo)
+ if version == d.app_version.scripts_tag and not options.force:
+ raise AlreadyUpgraded
+ if not options.dry_run:
+ perform_pre_commit(sh)
+ temp_wc_dir = perform_tmp_clone(sh)
+ with util.ChangeDirectory(temp_wc_dir):
+ sh.call("git", "remote", "add", "scripts", repo)
+ sh.call("git", "fetch", "-q", "scripts")
+ user_commit, next_commit = calculate_parents(sh, version)
+ # save variables so that --continue will work
+ # yeah yeah no trailing newline whatever
+ open(".git/WIZARD_REPO", "w").write(repo)
+ open(".git/WIZARD_UPGRADE_VERSION", "w").write(version)
+ open(".git/WIZARD_PARENTS", "w").write("%s\n%s" % (user_commit, next_commit))
+ perform_merge(sh, repo, d, version)
+ # variables: version, user_commit, next_commit, temp_wc_dir
+ with util.ChangeDirectory(temp_wc_dir):
+ try:
+ sh.call("git", "status")
+ sh.call("git", "commit", "-m", "throw-away commit")
+ except shell.CallError:
+ pass
+ message = make_commit_message(version)
+ new_tree = sh.eval("git", "rev-parse", "HEAD^{tree}")
+ final_commit = sh.eval("git", "commit-tree", new_tree,
+ "-p", user_commit, "-p", next_commit, input=message, log=True)
+ # a master branch may not necessarily exist if the user
+ # was manually installed to an earlier version
+ try:
+ sh.call("git", "checkout", "-q", "-b", "master", "--")
+ except shell.CallError:
+ sh.call("git", "checkout", "-q", "master", "--")
+ sh.call("git", "reset", "-q", "--hard", final_commit)
+ d.verifyVersion()
+ # Till now, all of our operations were in a tmp sandbox.
+ if options.dry_run:
+ logging.info("Dry run, bailing. See results at %s" % temp_wc_dir)
+ return
+ # perform database backup
+ backup = d.backup(options)
+ # XXX: frob .htaccess to make site inaccessible
+ with util.IgnoreKeyboardInterrupts():
+ with util.LockDirectory(".scripts-upgrade-lock"):
+ # git merge (which performs a fast forward)
+ sh.call("git", "pull", "-q", temp_wc_dir, "master")
+ version_obj = distutils.version.LooseVersion(version.partition('-')[2])
+ try:
+ # run update script
+ d.upgrade(version_obj, options)
+ d.verifyWeb()
+ except app.UpgradeFailure:
+ logging.warning("Upgrade failed: rolling back")
+ perform_restore(d, backup)
+ raise
+ except deploy.WebVerificationError as e:
+ logging.warning("Web verification failed: rolling back")
+ logging.info("Web page that was output was:\n\n%s" % e.contents)
+ perform_restore(d, backup)
+ raise app.UpgradeVerificationFailure("Upgrade caused website to become inaccessible; site was rolled back")
+ # XXX: frob .htaccess to make site accessible
+ # to do this, check if .htaccess changed, first. Upgrade
+ # process might have frobbed it. Don't be
+ # particularly worried if the segment disappeared
-# need errors for checking DAG integrity (if the user is on a completely
-# different history tree, stuff is problems)
+def perform_restore(d, backup):
+ # You don't want d.restore() because it doesn't perform
+ # the file level backup
+ shell.Shell().call("wizard", "restore", backup)
+ try:
+ d.verifyWeb()
+ except deploy.WebVerificationError:
+ logging.critical("Web verification failed after rollback")
-# we need an option that specifies the person making the update. Since n-b
-# doesn't actually have a way to do this, username is probably what we want.
-def main(argv, baton):
- options, args = parse_args(argv)
- dir = args[0]
- command.chdir(dir)
- if not os.path.isdir(".git"):
- raise NotAutoinstallError()
+def make_commit_message(version):
+ message = "Upgraded autoinstall in %s to %s.\n\n%s" % (util.get_dir_owner(), version, util.get_git_footer())
try:
- d = deploy.Deployment(".")
- except IOError as e:
- if e.errno == errno.ENOENT:
- raise NotAutoinstallError()
- else: raise e
- repo = d.application.repository
- # begin the command line process
- sh = shell.Shell(options.dry_run)
- # setup environment
- util.set_git_env()
- # commit their changes
+ message += "\nUpgraded-by: " + util.get_operator_git()
+ except util.NoOperatorInfo:
+ pass
+ return message
+
+def calculate_newest_version(sh, repo):
+ # XXX: put this in Application
+ return sh.eval("git", "--git-dir="+repo, "describe", "--tags", "master")
+
+def calculate_parents(sh, version):
+ user_commit = sh.eval("git", "rev-parse", "HEAD")
+ next_commit = sh.eval("git", "rev-parse", version)
+ return user_commit, next_commit
+
+def perform_pre_commit(sh):
message = "Pre-commit of %s locker before autoinstall upgrade.\n\n%s" % (util.get_dir_owner(), util.get_git_footer())
try:
message += "\nPre-commit-by: " + util.get_operator_git()
except util.NoOperatorInfo:
pass
try:
- sh.call("git", "commit", "-a", "-m", "Pre-upgrade commit.")
+ sh.call("git", "commit", "-a", "-m", message)
except shell.CallError:
logging.info("No changes detected")
- pass
- # perform fetch to update repository state
- sh.call("git", "fetch", repo)
- # clone their website to a temporary directory
- temp_dir = tempfile.mkdtemp()
+
+def perform_tmp_clone(sh):
+ temp_dir = tempfile.mkdtemp(prefix="wizard")
temp_wc_dir = os.path.join(temp_dir, "repo")
logging.info("Using temporary directory: " + temp_wc_dir)
- sh.call("git", "clone", "--shared", ".", temp_wc_dir)
- with util.ChangeDirectory(temp_wc_dir):
- # reconfigure the repository path
- sh.call("git", "remote", "add", "scripts", repo)
- sh.call("git", "fetch", "scripts")
- # perform the merge
- version, _ = sh.call(["git", "--git-dir="+repo, "describe", "--tags", "master"])
- try:
- message = "Upgraded autoinstall in %s to %s.\n\n%s" % (util.get_dir_owner(), version, util.get_git_footer())
+ sh.call("git", "clone", "-q", "--shared", ".", temp_wc_dir)
+ return temp_wc_dir
+
+def perform_merge(sh, repo, d, version):
+ # naive merge algorithm:
+ # sh.call("git", "merge", "-m", message, "scripts/master")
+ # crazy merge algorithm:
+ def make_virtual_commit(tag, parents = []):
+ """WARNING: Changes state of Git repository"""
+ sh.call("git", "checkout", "-q", tag, "--")
+ d.parametrize(".")
+ for file in d.application.parametrized_files:
try:
- message += "\nUpgraded-by: " + util.get_operator_git()
- except util.NoOperatorInfo:
+ sh.call("git", "add", "--", file)
+ except shell.CallError:
pass
- sh.call("git", "merge", "-m", message, "scripts/master")
- except shell.CallError:
- raise MergeFailed
- # XXX: frob .htaccess to make site inaccessible
- # git merge (which performs a fast forward)
- # - merge could fail (race)
- sh.call("git", "pull", temp_wc_dir, "master")
- # run update script
- sh.call(".scripts/update")
- # XXX: frob .htaccess to make site accessible
- # XXX: - check if .htaccess changed, first. Upgrade
- # process might have frobbed it. Don't be
- # particularly worried if the segment dissappeared
+ virtual_tree = sh.eval("git", "write-tree", log=True)
+ parent_args = itertools.chain(*(["-p", p] for p in parents))
+ virtual_commit = sh.eval("git", "commit-tree", virtual_tree,
+ *parent_args, input="", log=True)
+ sh.call("git", "reset", "--hard")
+ return virtual_commit
+ user_tree = sh.eval("git", "rev-parse", "HEAD^{tree}")
+ base_virtual_commit = make_virtual_commit(d.app_version.scripts_tag)
+ next_virtual_commit = make_virtual_commit(version, [base_virtual_commit])
+ user_virtual_commit = sh.eval("git", "commit-tree", user_tree,
+ "-p", base_virtual_commit, input="", log=True)
+ sh.call("git", "checkout", user_virtual_commit, "--")
+ try:
+ sh.call("git", "merge", next_virtual_commit)
+ except shell.CallError:
+ print os.getcwd()
+ logging.info("Conflict info:\n", sh.eval("git", "diff"))
+ raise MergeFailed
-def parse_args(argv):
- usage = """usage: %prog upgrade [ARGS] DIR
+def parse_args(argv, baton):
+ usage = """usage: %prog upgrade [ARGS] [DIR]
Upgrades an autoinstall to the latest version. This involves
updating files and running .scripts/update.
parser = command.WizardOptionParser(usage)
parser.add_option("--dry-run", dest="dry_run", action="store_true",
default=False, help="Prints would would be run without changing anything")
+ # notice trailing underscore
+ parser.add_option("--continue", dest="continue_", action="store_true",
+ default=False, help="Continues an upgrade that has had its merge manually "
+ "resolved using the current working directory as the resolved copy.")
+ parser.add_option("--force", dest="force", action="store_true",
+ default=False, help="Force running upgrade even if it's already at latest version.")
+ baton.push(parser, "srv_path")
options, args = parser.parse_all(argv)
if len(args) > 1:
parser.error("too many arguments")
- elif not args:
- parser.error("must specify directory")
return options, args
class Error(command.Error):
"""Base exception for all exceptions raised by upgrade"""
pass
-class NotAutoinstallError(Error):
+class AlreadyUpgraded(Error):
def __str__(self):
return """
-ERROR: Could not find .git file. Are you sure
-this is an autoinstalled application? Did you remember
-to migrate it?
-"""
+ERROR: This autoinstall is already at the latest version."""
class MergeFailed(Error):
- pass
+ def __str__(self):
+ return """
+
+ERROR: Merge failed. Resolve the merge by cd'ing to the
+temporary directory, finding conflicted files with `git status`,
+resolving the files, adding them using `git add` and then
+running `wizard upgrade --continue`."""
+
+class LocalChangesError(Error):
+ def __str__(self):
+ return """
+
+ERROR: Local changes occurred in the install while the merge was
+being processed so that a pull would not result in a fast-forward.
+The best way to resolve this is probably to attempt an upgrade again,
+with git rerere to remember merge resolutions (XXX: not sure if
+this actually works)."""
+
+class BlacklistedError(Error):
+ def __str__(self):
+ return """
+
+ERROR: This autoinstall was manually blacklisted against errors;
+if the user has not been notified of this, please send them
+mail."""
scripts.mit.edu / wizard.git / blobdiff