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6810c41f8e
log format expressions are broadly used within the code: once they are parsed from input string, they are converted to a linked list of logformat nodes. We're starting to face some limitations because we're simply storing the converted expression as a generic logformat_node list. The first issue we're facing is that storing logformat expressions that way doesn't allow us to add metadata alongside the list, which is part of the prerequites for implementing log-profiles. Another issue with storing logformat expressions as generic lists of logformat_node elements is that it's starting to become really hard to tell when we rely on logformat expressions or not in the code given that there isn't always a comment near the list declaration or manipulation to indicate that it's relying on logformat expressions under the hood, so this adds some complexity for code maintenance. This patch looks quite impressive due to changes in a lot of header and source files (since logformat expressions are broadly used), but it does a simple thing: it defines the lf_expr structure which itself holds a generic list of logformat nodes, and then declares some helpers to manipulate lf_expr elements and fixes the code so that we now exclusively manipulate logformat_node lists as lf_expr elements outside of log.c. For now, lf_expr struct only contains the list of logformat nodes (no additional metadata), but now that we have dedicated type and helpers, doing so in the future won't be problematic at all and won't require extensive code changes. |
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The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)