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2015-08-10skip .diff/Index acquire if Release file was a hitDavid Kalnischkies
QuereURI already skips the aquire of the real file in such a case, but it can't detect pdiffs this way. Those already have a handling if the file wasn't changed in between two Release files, so we just add an other check for a Release file hit here, too. Git-Dch: Ignore
2015-08-10add c++11 override marker to overridden methodsDavid Kalnischkies
C++11 adds the 'override' specifier to mark that a method is overriding a base class method and error out if not. We hide it in the APT_OVERRIDE macro to ensure that we keep compiling in pre-c++11 standards. Reported-By: clang-modernize -add-override -override-macros Git-Dch: Ignore
2015-08-10implement reverse_iterators for cachesetsDavid Kalnischkies
By further abstracting the iterator templates we can wrap the reverse iterators of the wrapped containers and share code in a way that iterator creating is now more template intensive, but shorter in code. Git-Dch: Ignore
2015-08-10prepare cachesets for -std=c++11David Kalnischkies
The "problem" is mostly in the erase() definitions as they slightly conflict and in pre-c++11 are not uniformly in different containers. By differenciating based on the standard we can provide erase() methods for both standards – and as the method is in a template and inline we don't need to worry about symbols here. The rest is adding wrappings for the new forward_list and unordered_set containers and correcting our iterators to use the same trait as the iterator they are wrapping instead of having all of them be simple forward iterators. This allows the use of specialized algorithms which are picked based on iterator_traits and implementing them all is simple to do as we can declare all methods easily and only if they are called they will generate errors (if the underlying iterator doesn't support these). Git-Dch: Ignore
2015-08-10allow individual targets to be kept compressedDavid Kalnischkies
There is an option to keep all targets (Packages, Sources, …) compressed for a while now, but the all-or-nothing approach is a bit limited for our purposes with additional targets as some of them are very big (Contents) and rarely used in comparison, so keeping them compressed by default can make sense, while others are still unpacked. Most interesting is the copy-change maybe: Copy is used by the acquire system as an uncompressor and it is hence expected that it returns the hashes for the "output", not the input. Now, in the case of keeping a file compressed, the output is never written to disk, but generated in memory and we should still validated it, so for compressed files copy is expected to return the hashes of the uncompressed file. We used to use the config option to enable on-the-fly decompress in the method, but in reality copy is never used in a way where it shouldn't decompress a compressed file to get its hashes, so we can save us the trouble of sending this information to the method and just do it always.
2015-08-10remove the longtime deprecated vendor{,list} stuffDavid Kalnischkies
History suggests that this comes from an earlier apt-secure implementation, but never really became a thing, totally unused and marked as deprecated for "ages" now. Especially as it did nothing even if it would have been used (libapt itself didn't use it at all).
2015-08-10implement Signed-By option for sources.listDavid Kalnischkies
Limits which key(s) can be used to sign a repository. Not immensely useful from a security perspective all by itself, but if the user has additional measures in place to confine a repository (like pinning) an attacker who gets the key for such a repository is limited to its potential and can't use the key to sign its attacks for an other (maybe less limited) repository… (yes, this is as weak as it sounds, but having the capability might come in handy for implementing other stuff later).
2015-08-10add sources.list Check-Valid-Until and Valid-Until-{Max,Min} optionsDavid Kalnischkies
These options could be set via configuration before, but the connection to the actual sources is so strong that they should really be set in the sources.list instead – especially as this can be done a lot more specific rather than e.g. disabling Valid-Until for all sources at once. Valid-Until-* names are chosen instead of the Min/Max-ValidTime as this seems like a better name and their use in the wild is probably low enough that this isn't going to confuse anyone if we have to names for the same thing in different areas. In the longrun, the config options should be removed, but for now documentation hinting at the new options is good enough as these are the kind of options you set once across many systems with different apt versions, so the new way should work everywhere first before we deprecate the old way.
2015-08-10merge indexRecords into metaIndexDavid Kalnischkies
indexRecords was used to parse the Release file – mostly the hashes – while metaIndex deals with downloading the Release file, storing all indexes coming from this release and … parsing the Release file, but this time mostly for the other fields. That wasn't a problem in metaIndex as this was done in the type specific subclass, but indexRecords while allowing to override the parsing method did expect by default a specific format. APT isn't really supporting different types at the moment, but this is a violation of the abstraction we have everywhere else and, which is the actual reason for this merge: Options e.g. coming from the sources.list come to metaIndex naturally, which needs to wrap them up and bring them into indexRecords, so the acquire system is told about it as they don't get to see the metaIndex, but they don't really belong in indexRecords as this is just for storing data loaded from the Release file… the result is a complete mess. I am not saying it is a lot prettier after the merge, but at least adding new options is now slightly easier and there is just one place responsible for parsing the Release file. That can't hurt.
2015-08-10detect and error out on conflicting Trusted settingsDavid Kalnischkies
A specific trust state can be enforced via a sources.list option, but it effects all entries handled by the same Release file, not just the entry it was given on so we enforce acknowledgement of this by requiring the same value to be (not) set on all such entries.
2015-08-10bring back deb822 sources.list entries as .sourcesDavid Kalnischkies
Having two different formats in the same file is very dirty and causes external tools to fail hard trying to parse them. It is probably not a good idea for them to parse them in the first place, but they do and we shouldn't break them if there is a better way. So we solve this issue for now by giving our deb822 format a new filename extension ".sources" which unsupporting applications are likely to ignore an can begin gradually moving forward rather than waiting for the unknown applications to catch up. Currently and for the forseeable future apt is going to support both with the same feature set as documented in the manpage, with the longtime plan of adopting the 'new' format as default, but that is a long way to go and might get going more from having an easier time setting options than from us pushing it explicitely.
2015-08-10support lang= and target= sources.list optionsDavid Kalnischkies
We support arch= for a while, now we finally add lang= as well and as a first simple way of controlling which targets to acquire also target=. This asked for a redesign of the internal API of parsing and storing information about 'deb' and 'deb-src' lines. As this API isn't visible to the outside no damage done through. Beside being a nice cleanup (= it actually does more in less lines) it also provides us with a predictable order of architectures as provides in the configuration rather than based on string sorting-order, so that now the native architecture is parsed/displayed first. Observeable e.g. in apt-get output.
2015-08-10fix memory leaks reported by -fsanitizeDavid Kalnischkies
Various small leaks here and there. Nothing particularily big, but still good to fix. Found by the sanitizers while running our testcases. Reported-By: gcc -fsanitize Git-Dch: Ignore
2015-08-10some CXXFLAGS housekeepingDavid Kalnischkies
More warnings are always better. Git-Dch: Ignore
2015-08-10simplify Origin matchmaking for status filesDavid Kalnischkies
The old check is overly complicated nowadays as we have a pretty defining difference between packages from a Packages files coming from with a Release file (even if the file itself doesn't exist) and packages coming from the dpkg.status or directly out of *.deb's as these have no associated Release file. Git-Dch: Ignore
2015-08-10cleanup Container.erase API to look more like std::containersDavid Kalnischkies
C++11 slightly changes the API again to const_iterator, but we are find with iterators in the C++03 style for now as long as they look and behave equally to the methods of the standard containers. Git-Dch: Ignore
2015-08-10make all d-pointer * const pointersDavid Kalnischkies
Doing this disables the implicit copy assignment operator (among others) which would cause hovac if used on the classes as it would just copy the pointer, not the data the d-pointer points to. For most of the classes we don't need a copy assignment operator anyway and in many classes it was broken before as many contain a pointer of some sort. Only for our Cacheset Container interfaces we define an explicit copy assignment operator which could later be implemented to copy the data from one d-pointer to the other if we need it. Git-Dch: Ignore
2015-08-10apply various style suggestions by cppcheckDavid Kalnischkies
Some of them modify the ABI, but given that we prepare a big one already, these few hardly count for much. Git-Dch: Ignore
2015-08-10policy: Fix the handling of config-files statesJulian Andres Klode
Gbp-Dch: ignore
2015-08-10policy: Fix the new policy implementation to handle downgrades correctlyJulian Andres Klode
This was broken previously, as we'd choose a downgrade when it's pin was higher than the previously selected candidate.
2015-08-10Determine the candidate based on per-version pins, instead of old codeJulian Andres Klode
The new implementation assigns each version a pin, instead of assigning the pin to a package. This enables us to give each version of a package a different priority. Closes: #770017 Closes: #622237 Closes: #620249 Closes: #685215
2015-08-10policy: Return highest file pin if version pin == 0 in GetPriority()Julian Andres Klode
This makes sure that we display a useful value instead of 0 for versions that are pinned due to package files.
2015-08-10policy: Assign per-version pinsJulian Andres Klode
2015-08-10versionmatch: Extract version match checking out of Find()Julian Andres Klode
Refactor version matching to allow us to check if a version matches a pin. This will aid the per-version pinning implementation.
2015-08-10pkgPolicy: Introduce storage and helpers for per-version pinsJulian Andres Klode
Per-version pins should lead to more predictable results with /etc/apt/preferences uses like pinning one version with -1.
2015-06-16add d-pointer, virtual destructors and de-inline de/constructorsDavid Kalnischkies
To have a chance to keep the ABI for a while we need all three to team up. One of them missing and we might loose, so ensuring that they are available is a very tedious but needed task once in a while. Git-Dch: Ignore
2015-06-15allow ratelimiting progress reporting for testcasesDavid Kalnischkies
Progress reports once in a while which is a bit to unpredictable for testcases, so we enforce a steady progress for them in the hope that this makes the tests (mostly test-apt-progress-fd) a bit more stable. Git-Dch: Ignore
2015-06-15condense parallel requests with the same hashes to oneDavid Kalnischkies
It shouldn't be too common, but sometimes people have multiple mirrors in the sources or otherwise repositories with the same content. Now that we gracefully can handle multiple requests to the same URI, we can also fold multiple requests with the same expected hashes into one. Note that this isn't trying to find oppertunities for merging, but just merges if it happens to encounter the oppertunity for it. This is most obvious in the new testcase actually as it needs to delay the action to give the acquire system enough time to figure out that they can be merged.
2015-06-15show item ID in Hit, Ign and Err lines as wellDavid Kalnischkies
Again, consistency is the main sellingpoint here, but this way it is now also easier to explain that some files move through different stages and lines are printed for them hence multiple times: That is a bit hard to believe if the number is changing all the time, but now that it keeps consistent.
2015-06-15call URIStart in cdrom and file methodDavid Kalnischkies
All other methods call it, so they should follow along even if the work they do afterwards is hardly breathtaking and usually results in a URIDone pretty soon, but the acquire system tells the individual item about this via a virtual method call, so even through none of our existing items contains any critical code in these, maybe one day they might. Consistency at least once… Which is also why this has a good sideeffect: file: and cdrom: requests appear now in the 'apt-get update' output. Finally - it never made sense to hide them for me. Okay, I guess it made before the new hit behavior, but now that you can actually see the difference in an update it makes sense to see if a file: repository changed or not as well.
2015-06-15deal better with acquiring the same URI multiple timesDavid Kalnischkies
This is an unlikely event for indexes and co, but it can happen quiet easily e.g. for changelogs where you want to get the changelogs for multiple binary package(version)s which happen to all be built from a single source. The interesting part is that the Acquire system actually detected this already and set the item requesting the URI again to StatDone - expect that this is hardly sufficient: an Item must be Complete=true as well to be considered truely done and that is only the tip of the ::Done handling iceberg. So instead of this StatDone hack we allow QItems to be owned by multiple items and notify all owners about everything now, so that for the point of each item they got it downloaded just for them.
2015-06-15provide a public interface for acquiring changelogsDavid Kalnischkies
Provided is a specialized acquire item which given a version can figure out the correct URI to try by itself and if not provides an error message alongside with static methods to get just the URI it would try to download if it should just be displayed or similar such. The URI is constructed as follows: Release files can provide an URI template in the "Changelogs" field, otherwise we lookup a configuration item based on the "Label" or "Origin" of the Release file to get a (hopefully known) default value for now. This template should contain the string CHANGEPATH which is replaced with the information about the version we want the changelog for (e.g. main/a/apt/apt_1.1). This middleway was choosen as this path part was consistent over the three known implementations (+1 defunct), while the rest of the URI varies widely between them. The benefit of this construct is that it is now easy to get changelogs for Debian packages on Ubuntu and vice versa – even at the moment where the Changelogs field is present nowhere. Strictly better than what apt-get had before as it would even fail to get changelogs from security… Now it will notice that security identifies as Origin: Debian and pick this setting (assuming again that no Changelogs field exists). If on the other hand security would ship its changelogs in a different location we could set it via the Label option overruling Origin. Closes: 687147, 739854, 784027, 787190
2015-06-15hide Translation-* in 'apt-cache policy' outputDavid Kalnischkies
Translation-* files are internally handled as PackageFiles which isn't super nice, but giving them their own struct is a bit overkill so let it be for the moment. They always appeared in the policy output because of this through and now that they are properly linked to a ReleaseFile they even display all the pinning information on them, but they don't contain any packages which could be pinned… No problem, but useless and potentially confusing output. Adding a 'NoPackages' flag which can be set on those files and be used in applications seems like a simple way to fix this display issue.
2015-06-15populate the Architecture field for PackageFilesDavid Kalnischkies
This is mainly visible in the policy, so that you can now pin by b= and let it only effect Packages files of this architecture and hence the packages coming from it (which do not need to be from this architecture, but very likely are in a normal repository setup). If you should pin by architecture in this way is a different question… Closes: 687255
2015-06-15implement default apt-get file --release-info modeDavid Kalnischkies
Selecting targets based on the Release they belong to isn't to unrealistic. In fact, it is assumed to be the most used case so it is made the default especially as this allows to bundle another thing we have to be careful with: Filenames and only showing targets we have acquired. Closes: 752702
2015-06-12store Release files data in the CacheDavid Kalnischkies
We used to read the Release file for each Packages file and store the data in the PackageFile struct even through potentially many Packages (and Translation-*) files could use the same data. The point of the exercise isn't the duplicated data through. Having the Release files as first-class citizens in the Cache allows us to properly track their state as well as allows us to use the information also for files which aren't in the cache, but where we know to which Release file they belong (Sources are an example for this). This modifies the pkgCache structs, especially the PackagesFile struct which depending on how libapt users access the data in these structs can mean huge breakage or no visible change. As a single data point: aptitude seems to be fine with this. Even if there is breakage it is trivial to fix in a backportable way while avoiding breakage for everyone would be a huge pain for us. Note that not all PackageFile structs have a corresponding ReleaseFile. In particular the dpkg/status file as well as *.deb files have not. As these have only a Archive property need, the Component property takes over this duty and the ReleaseFile remains zero. This is also the reason why it isn't needed nor particularily recommended to change from PackagesFile to ReleaseFile blindly. Sticking with the earlier is usually the better option.
2015-06-11implement 'apt-get files' to access index targetsDavid Kalnischkies
Downloading additional files is only half the job. We still need a way to allow external tools to know where the files are they requested for download given that we don't want them to choose their own location. 'apt-get files' is our answer to this showing by default in a deb822 format information about each IndexTarget with the potential to filter the records based on lines and an option to change the output format. The command serves also as an example on how to get to this information via libapt.
2015-06-11use an enum instead of strings as IndexTarget::Option interfaceDavid Kalnischkies
Strings are easy to typo and we can keep the extensibility we require here with a simple enum we can append to without endangering ABI. Git-Dch: Ignore
2015-06-11use IndexTarget to get to IndexFileDavid Kalnischkies
Removes a bunch of duplicated code in the deb-specific parts. Especially the Description part is now handled centrally by IndexTarget instead of being duplicated to the derivations of IndexFile. Git-Dch: Ignore
2015-06-11show URI.Path in all acquire item descriptionsDavid Kalnischkies
It is a rather strange sight that index items use SiteOnly which strips the Path, while e.g. deb files are downloaded with NoUserPassword which does not. Important to note here is that for the file transport Path is pretty important as there is no Host which would be displayed by Site, which always resulted in "interesting" unspecific errors for "file:". Adding a 'middle' ground between the two which does show the Path but potentially modifies it (it strips a pending / at the end if existing) solves this "file:" issue, syncs the output and in the end helps to identify which file is meant exactly in progress output and co as a single site can have multiple repositories in different paths.
2015-06-10rename Calculate- to GetIndexTargets and use it as official APIDavid Kalnischkies
We need a general way to get from a sources.list entry to IndexTargets and with this change we can move from pkgSourceList over the list of metaIndexes it includes to the IndexTargets each metaIndex can have. Git-Dch: Ignore
2015-06-10stop using IndexTarget pointers which are never freedDavid Kalnischkies
Creating and passing around a bunch of pointers of IndexTargets (and of a vector of pointers of IndexTargets) is probably done to avoid the 'costly' copy of container, but we are really not in a timecritical operation here and move semantics will help us even further in the future. On the other hand we never do a proper cleanup of these pointers, which is very dirty, even if structures aren't that big… The changes will effecting many items only effect our own hidden class, so we can do that without fearing breaking interfaces or anything. Git-Dch: Ignore
2015-06-10store all targets data in IndexTarget structDavid Kalnischkies
We still need an API for the targets, so slowly prepare the IndexTargets to let them take this job. Git-Dch: Ignore
2015-06-10abstract the code to iterate over all targets a bitDavid Kalnischkies
We have two places in the code which need to iterate over targets and do certain things with it. The first one is actually creating these targets for download and the second instance pepares certain targets for reading. Git-Dch: Ignore
2015-06-09configureable acquire targets to download additional filesDavid Kalnischkies
First pass at making the acquire system capable of downloading files based on configuration rather than hardcoded entries. It is now possible to instruct 'deb' and 'deb-src' sources.list lines to download more than just Packages/Translation-* and Sources files. Details on how to do that can be found in the included documentation file.
2015-06-09remove debianism file-content verificationDavid Kalnischkies
The code requires every index file we download to have a Package field, but that doesn't hold true for all index we might want to download in the future. Some might not even be deb822 formatted files… The check was needed as apt used to accept unverifiable files like Translation-*, but nowadays it requires hashes for these as well. Even for unsigned repositories we interpret the Release file as binding now, which means this check isn't triggerable expect for repositories which do not have a Release file at all – something which is highly discouraged! Git-Dch: Ignore
2015-06-09do not request files if we expect an IMS hitDavid Kalnischkies
If we have a file on disk and the hashes are the same in the new Release file and the old one we have on disk we know that if we ask the server for the file, we will at best get an IMS hit – at worse the server doesn't support this and sends us the (unchanged) file and we have to run all our checks on it again for nothing. So, we can save ourselves (and the servers) some unneeded requests if we figure this out on our own.
2015-06-09cleanup pdiff support detection decisionDavid Kalnischkies
Its a bit unclean to create an item just to let the item decide that it can't do anything and let it fail, so instead we let the item creator decide in all cases if patching should be attempted. Also pulls a small trick to get the hashes for the current file without calculating them by looking at the 'old' Release file if we have it. Git-Dch: Ignore
2015-06-09support hashes for compressed pdiff filesDavid Kalnischkies
At the moment we only have hashes for the uncompressed pdiff files, but via the new '$HASH-Download' field in the .diff/Index hashes can be provided for the .gz compressed pdiff file, which apt will pick up now and use to verify the download. Now, we "just" need a buy in from the creators of repositories…
2015-06-09check patch hashes in rred worker instead of in the handlerDavid Kalnischkies
rred is responsible for unpacking and reading the patch files in one go, but we currently only have hashes for the uncompressed patch files, so the handler read the entire patch file before dispatching it to the worker which would read it again – both with an implicit uncompress. Worse, while the workers operate in parallel the handler is the central orchestration unit, so having it busy with work means the workers do (potentially) nothing. This means rred is working with 'untrusted' data, which is bad. Yet, having the unpack in the handler meant that the untrusted uncompress was done as root which isn't better either. Now, we have it at least contained in a binary which we can harden a bit better. In the long run, we want hashes for the compressed patch files through to be safe.