git/log-tree.c, branch v2.20.2

range-diff: always pass at least minimal diff options

2018-12-04T01:36:14Z

Commit d8981c3f88 ("format-patch: do not let its diff-options affect --range-diff", 2018-11-30) taught `show_range_diff()` to accept a NULL-pointer as an indication that it should use its own "reasonable default". That fixed a regression from a5170794 ("Merge branch 'ab/range-diff-no-patch'", 2018-11-18), but unfortunately it introduced a regression of its own. In particular, it means we forget the `file` member of the diff options, so rather than placing a range-diff in the cover-letter, we write it to stdout. In order to fix this, rewrite the two callers adjusted by d8981c3f88 to instead create a "dummy" set of diff options where they only fill in the fields we absolutely require, such as output file and color. Modify and extend the existing tests to try and verify that the right contents end up in the right place. Don't revert `show_range_diff()`, i.e., let it keep accepting NULL. Rather than removing what is dead code and figuring out it isn't actually dead and we've broken 2.20, just leave it for now. [es: retain diff coloring when going to stdout] Signed-off-by: Martin Ågren Signed-off-by: Eric Sunshine Signed-off-by: Junio C Hamano

format-patch: do not let its diff-options affect --range-diff

2018-11-30T04:47:55Z

Stop leaking how the primary output of format-patch is customized to the range-diff machinery and instead let the latter use its own "reasonable default", in order to correct the breakage introduced by a5170794 ("Merge branch 'ab/range-diff-no-patch'", 2018-11-18) on the 'master' front. "git format-patch --range-diff..." without any weird diff option started to include the "range-diff --stat" output, which is rather useless right now, that made the whole thing unusable and this is probably the least disruptive way to whip the codebase into a shippable shape. We may want to later make the range-diff driven by format-patch more configurable, but that would have to wait until we have a good design. Signed-off-by: Junio C Hamano

Merge branch 'jk/cocci'

2018-09-17T20:53:57Z

spatch transformation to replace boolean uses of !hashcmp() to newly introduced oideq() is added, and applied, to regain performance lost due to support of multiple hash algorithms. * jk/cocci: show_dirstat: simplify same-content check read-cache: use oideq() in ce_compare functions convert hashmap comparison functions to oideq() convert "hashcmp() != 0" to "!hasheq()" convert "oidcmp() != 0" to "!oideq()" convert "hashcmp() == 0" to hasheq() convert "oidcmp() == 0" to oideq() introduce hasheq() and oideq() coccinelle: use <...> for function exclusion

Merge branch 'es/format-patch-rangediff'

2018-09-17T20:53:56Z

"git format-patch" learned a new "--range-diff" option to explain the difference between this version and the previous attempt in the cover letter (or after the tree-dashes as a comment). * es/format-patch-rangediff: format-patch: allow --range-diff to apply to a lone-patch format-patch: add --creation-factor tweak for --range-diff format-patch: teach --range-diff to respect -v/--reroll-count format-patch: extend --range-diff to accept revision range format-patch: add --range-diff option to embed diff in cover letter range-diff: relieve callers of low-level configuration burden range-diff: publish default creation factor range-diff: respect diff_option.file rather than assuming 'stdout'

Merge branch 'es/format-patch-interdiff'

2018-09-17T20:53:55Z

"git format-patch" learned a new "--interdiff" option to explain the difference between this version and the previous atttempt in the cover letter (or after the tree-dashes as a comment). * es/format-patch-interdiff: format-patch: allow --interdiff to apply to a lone-patch log-tree: show_log: make commentary block delimiting reusable interdiff: teach show_interdiff() to indent interdiff format-patch: teach --interdiff to respect -v/--reroll-count format-patch: add --interdiff option to embed diff in cover letter format-patch: allow additional generated content in make_cover_letter()

convert "oidcmp() == 0" to oideq()

2018-08-29T18:32:49Z

Using the more restrictive oideq() should, in the long run, give the compiler more opportunities to optimize these callsites. For now, this conversion should be a complete noop with respect to the generated code. The result is also perhaps a little more readable, as it avoids the "zero is equal" idiom. Since it's so prevalent in C, I think seasoned programmers tend not to even notice it anymore, but it can sometimes make for awkward double negations (e.g., we can drop a few !!oidcmp() instances here). This patch was generated almost entirely by the included coccinelle patch. This mechanical conversion should be completely safe, because we check explicitly for cases where oidcmp() is compared to 0, which is what oideq() is doing under the hood. Note that we don't have to catch "!oidcmp()" separately; coccinelle's standard isomorphisms make sure the two are treated equivalently. I say "almost" because I did hand-edit the coccinelle output to fix up a few style violations (it mostly keeps the original formatting, but sometimes unwraps long lines). Signed-off-by: Jeff King Signed-off-by: Junio C Hamano

Merge branch 'jk/core-use-replace-refs'

2018-08-15T22:08:23Z

A new configuration variable core.usereplacerefs has been added, primarily to help server installations that want to ignore the replace mechanism altogether. * jk/core-use-replace-refs: add core.usereplacerefs config option check_replace_refs: rename to read_replace_refs check_replace_refs: fix outdated comment

format-patch: allow --range-diff to apply to a lone-patch

2018-08-14T21:27:05Z

When submitting a revised version of a patch or series, it can be helpful (to reviewers) to include a summary of changes since the previous attempt in the form of a range-diff, typically in the cover letter. However, it is occasionally useful, despite making for a noisy read, to insert a range-diff into the commentary section of the lone patch of a 1-patch series. Therefore, extend "git format-patch --range-diff=" to insert a range-diff into the commentary section of a lone patch rather than requiring a cover letter. Implementation note: Generating a range-diff for insertion into the commentary section of a patch which itself is currently being generated requires invoking the diffing machinery recursively. However, the machinery does not (presently) support this since it uses global state. Consequently, we need to take care to stash away the state of the in-progress operation while generating the range-diff, and restore it after. Signed-off-by: Eric Sunshine Signed-off-by: Junio C Hamano

Merge branch 'es/format-patch-interdiff' into es/format-patch-rangediff

2018-08-14T21:23:53Z

* es/format-patch-interdiff: format-patch: allow --interdiff to apply to a lone-patch log-tree: show_log: make commentary block delimiting reusable interdiff: teach show_interdiff() to indent interdiff format-patch: teach --interdiff to respect -v/--reroll-count format-patch: add --interdiff option to embed diff in cover letter format-patch: allow additional generated content in make_cover_letter()

Merge branch 'sb/object-store-lookup'

2018-08-02T22:30:42Z

lookup_commit_reference() and friends have been updated to find in-core object for a specific in-core repository instance. * sb/object-store-lookup: (32 commits) commit.c: allow lookup_commit_reference to handle arbitrary repositories commit.c: allow lookup_commit_reference_gently to handle arbitrary repositories tag.c: allow deref_tag to handle arbitrary repositories object.c: allow parse_object to handle arbitrary repositories object.c: allow parse_object_buffer to handle arbitrary repositories commit.c: allow get_cached_commit_buffer to handle arbitrary repositories commit.c: allow set_commit_buffer to handle arbitrary repositories commit.c: migrate the commit buffer to the parsed object store commit-slabs: remove realloc counter outside of slab struct commit.c: allow parse_commit_buffer to handle arbitrary repositories tag: allow parse_tag_buffer to handle arbitrary repositories tag: allow lookup_tag to handle arbitrary repositories commit: allow lookup_commit to handle arbitrary repositories tree: allow lookup_tree to handle arbitrary repositories blob: allow lookup_blob to handle arbitrary repositories object: allow lookup_object to handle arbitrary repositories object: allow object_as_type to handle arbitrary repositories tag: add repository argument to deref_tag tag: add repository argument to parse_tag_buffer tag: add repository argument to lookup_tag ...