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2016-02-14Implement support for excluding arbitrary paths from trackingAdrian Kummerlaender
The library may be provided with a new-line separated list of regular expressions via the newly introduced `CHANGE_LOG_IGNORE_PATTERN_PATH`. Any proposed tracking path that is matched by any of the provided patterns is excluded from change reporting. This functionality uses the Standard's regular expression parsing functionality and as such doesn't introduce any new dependencies. If no file path is provided or the provided file path is unreadable all paths will be tracked. `change` was adapted to set `CHANGE_LOG_IGNORE_PATTERN_PATH` to `.change_log_ignore` which means that it will by default exclude any patterns provided via this file in the current working directory. An example for such a file customized for hiding _vim_'s internal write logic may look as follows: [0-9]+ [^~]*~ [.*\.viminfo .*\.swp Note that this is implemented in a fashion where it is not guaranteed that the full _canonical_ path is checked against the patterns. It remains to be decided if this is enough for all common use cases of this new functionality. `tracking::PathMatcher` lacks any explicit thread synchronization - according to my current knowledge this should not be necessary as we are only ever reading the private `std::vector<std::regex>` instance. If invalid regular expressions are provided they are silently ignored.
2016-02-14Reduce `ChangeTracker` public _interface_ to `track`Adrian Kummerlaender
2016-02-13Add filesystem exception handling where requiredAdrian Kummerlaender
2016-02-13Reimplement locking in `Logger::append`Adrian Kummerlaender
2016-02-11Delay tracking activationAdrian Kummerlaender
Introduce global static `enabled` variable used to signal the interposed functions to either start tracking or perform plain forwarding without any additional logic. This is required as e.g. `nvim` crashed when wrapped in `libChangeLog` because it called interposed functions during library initialization.
2016-02-11Extract file descriptor filter logicAdrian Kummerlaender
2016-02-11Extract child emplacement into thread safe memberAdrian Kummerlaender
2016-02-10Replace macro argument expansion with more idiomatic recursive templateAdrian Kummerlaender
2016-02-07Increase log message generation readabilityAdrian Kummerlaender
2016-02-06Prevent deleted files from being displayed using `diff`Adrian Kummerlaender
2016-02-06Track `writev` system callAdrian Kummerlaender
2016-02-06Preserve pre-change file content as tracking stateAdrian Kummerlaender
Relying on `diff` for storing the pre-change content did not work out as it opens the file descriptors to soon and only reads the first block of pre-change file content until the remaining content is actually required. This obviously led to problems when tracking actually changing files.
2015-12-27Introduce thread synchronization for tracking init and loggingAdrian Kummerlaender
This obviously leads to synchronizing syscalls that would otherwise happen in parallel. Luckily the goal of this library is to monitor file changes performed by single, user facing applications and as such it doesn't matter if some operations are slightly slower.
2015-12-27Explicitly set log file permissionsAdrian Kummerlaender
This ensures that the log file is actually accessable - there was a problem where e.g. `change rm test` did not create the log file correctly.
2015-12-24Prevent the libraries own log writes from being trackedAdrian Kummerlaender
2015-12-24Add path label for the file provided via standard inputAdrian Kummerlaender
2015-12-24Use full path for change trackingAdrian Kummerlaender
Prevents the same file being tracked multiple times due to relative input paths.
2015-12-24Add support for changing the `diff` command via an environment variableAdrian Kummerlaender
While the file arguments remain fixed the actual `diff` application and its output style can be changed using the `CHANGE_LOG_DIFF_CMD` environment variable.
2015-12-24Remove unnecessary headersAdrian Kummerlaender
2015-12-24Remove `exit` logging and interpositionAdrian Kummerlaender
The library is designed to track the file changes performed by a single process, i.e. there is no need for explicitly stating when the process has exited. Furthermore this reduces the set of function interpositions to the ones handled by the `get_actual_function` method template.
2015-12-24Match namespace and directory structureAdrian Kummerlaender
2015-12-23Implement file change tracking using `diff`Adrian Kummerlaender
The newly introduced `ChangeTracker` class is now keeping track of all tracked file in addition to spawning and managing a corresponding `diff` instance that enables printing pretty _patch-style_ change summaries to the logging target. This commit introduces `boost-process` and `diff` as dependencies of this library.
2015-12-21Add file mode check in `unlink`Adrian Kummerlaender
2015-11-30Extract actual function acquisitionAdrian Kummerlaender
The pointers to the actual function implementations are now fetched inside the `actual` namespace declared in the `actual_function.h` header. Fixed source of _noreturn_ related warning during compilation by adding the appropriate flag. Sadly this means that we can not use `std::function` in this context as it doesn't seem to carry these _c-like_ flags.
2015-11-14Fix rename tracking and enable logfile creationAdrian Kummerlaender
2015-10-18Implement logging of writable `mmap` creationsAdrian Kummerlaender
2015-10-18Add cmake build instructionsAdrian Kummerlaender