Greetings, It is possible to configure git-rev-list(1) to print the OID of missing objects by setting the `--missing=print` option. While it is useful knowing about these objects, it would be nice to have even more context about the objects that are missing. Luckily, from an object containing the missing object, it is possible to infer additional information the missing object. For example, if the tree containing a missing blob still exists, the tree entry for the missing object should contain path and type information. This series aims to provide git-rev-list(1) with a new `print-info` missing action for the `--missing` option that, when set, behaves like the existing `print` action but also prints other potentially interesting information about the missing object. Missing object info is printed in the form `?<oid> [<token>=<value>]...` where multiple `<token>=<value>` pairs may be specified each separated from each other with a SP. Values that contain SP or LF characters are expected to be encoded in a manner such that these problematic bytes are handled. For missing object path information this is handled by quoting the path in the C style if it contains SP or special characters. One concern I currently have with this quoting approach is that it is a bit more challenging to machine parse compared to something like using a null byte to delimit between missing info. One option is, in a followup series, introduce a git-for-each-ref(1) style format syntax. Maybe something like: `--missing=print-info:%(path)%00%(type)`. I'm curious if anyone may have thoughts around this. My goal is to ensure that there is an easy to use machine parsable interface to get this information. I could see something like `?<oid> path="foo \"bar" type=blob`, being a bit complex. The series is set up as follows: - Pathes 1 and 2 provide the `quote_c_style` and `quote_path` functions with a way print consistent output regardless of how core.quotePath is set. - Patch 3 introduces the `print-info` missing action and supports printing missing object path information. - Patch 4 extends the `print-info` missing action to also print object type information about the missing object. Changes in V3: - This missing info is provided once again through an explicit `--missing=print-info` action instead of combining the `--missing=print` and `--missing-info` flag. This was done to make the interface a bit straightforward to use and not introduce a flag and is dependent on another. - Added flag to `quote_path()` to disable core.quotePath from impacting quoted output and use it when print missing object path info. - Update documentation to not use the term "attribute" which could be confused with gitattributes. Due to all rearranging/changes in this version, I opted not to include a range-diff. Thanks, -Justin Justin Tobler (4): quote: add c quote flag to ignore core.quotePath quote: add quote_path() flag to ignore config rev-list: add print-info action to print missing object path rev-list: extend print-info to print missing object type Documentation/rev-list-options.txt | 19 +++++ builtin/rev-list.c | 107 ++++++++++++++++++++++++----- quote.c | 27 +++++--- quote.h | 6 +- t/t6022-rev-list-missing.sh | 53 ++++++++++++++ 5 files changed, 184 insertions(+), 28 deletions(-) base-commit: b74ff38af58464688b211140b90ec90598d340c6 -- 2.48.1.157.g3b0d05c4a7
