diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/RelNotes/2.18.0.txt | 122 | ||||
| -rw-r--r-- | Documentation/config.txt | 1 | ||||
| -rw-r--r-- | Documentation/git-filter-branch.txt | 8 | ||||
| -rw-r--r-- | Documentation/git-gc.txt | 28 | ||||
| -rw-r--r-- | Documentation/git-rebase.txt | 7 | ||||
| -rw-r--r-- | Documentation/git-shortlog.txt | 2 | ||||
| -rw-r--r-- | Documentation/git-svn.txt | 13 | ||||
| -rw-r--r-- | Documentation/gitrepository-layout.txt | 5 | ||||
| -rw-r--r-- | Documentation/howto/recover-corrupted-object-harder.txt | 2 | ||||
| -rw-r--r-- | Documentation/technical/hash-function-transition.txt | 40 |
10 files changed, 198 insertions, 30 deletions
diff --git a/Documentation/RelNotes/2.18.0.txt b/Documentation/RelNotes/2.18.0.txt new file mode 100644 index 0000000..5f16516 --- /dev/null +++ b/Documentation/RelNotes/2.18.0.txt @@ -0,0 +1,122 @@ +Git 2.18 Release Notes +====================== + +Updates since v2.17 +------------------- + +UI, Workflows & Features + + * Rename detection logic in "diff" family that is used in "merge" has + learned to guess when all of x/a, x/b and x/c have moved to z/a, + z/b and z/c, it is likely that x/d added in the meantime would also + want to move to z/d by taking the hint that the entire directory + 'x' moved to 'z'. A bug causing dirty files involved in a rename + to be overwritten during merge has also been fixed as part of this + work. + + * "git filter-branch" learned to use a different exit code to allow + the callers to tell the case where there was no new commits to + rewrite from other error cases. + + * When built with more recent cURL, GIT_SSL_VERSION can now specify + "tlsv1.3" as its value. + + +Performance, Internal Implementation, Development Support etc. + + * A "git fetch" from a repository with insane number of refs into a + repository that is already up-to-date still wasted too many cycles + making many lstat(2) calls to see if these objects at the tips + exist as loose objects locally. These lstat(2) calls are optimized + away by enumerating all loose objects beforehand. + It is unknown if the new strategy negatively affects existing use + cases, fetching into a repository with many loose objects from a + repository with small number of refs. + + * Git can be built to use either v1 or v2 of the PCRE library, and so + far, the build-time configuration USE_LIBPCRE=YesPlease instructed + the build procedure to use v1, but now it means v2. USE_LIBPCRE1 + and USE_LIBPCRE2 can be used to explicitly choose which version to + use, as before. + + * The build procedure learned to optionally use symbolic links + (instead of hardlinks and copies) to install "git-foo" for built-in + commands, whose binaries are all identical. + + * Conversion from uchar[20] to struct object_id continues. + + * The way "git worktree prune" worked internally has been simplified, + by assuming how "git worktree move" moves an existing worktree to a + different place. + + * Code clean-up for the "repository" abstraction. + (merge 00a3da2a13 nd/remove-ignore-env-field later to maint). + + * Code to find the length to uniquely abbreviate object names based + on packfile content, which is a relatively recent addtion, has been + optimized to use the same fan-out table. + + * The mechanism to use parse-options API to automate the command line + completion continues to get extended and polished. + + * Copies of old scripted Porcelain commands in contrib/examples/ have + been removed. + + * Some tests that rely on the exact hardcoded values of object names + have been updated in preparation for hash function migration. + + * Perf-test update. + + * Test helper update. + + * The effort continues to refactor the internal global data structure + to make it possible to open multiple repositories, work with and + then close them, + + * Small test-helper programs have been consolidated into a single + binary. + +Also contains various documentation updates and code clean-ups. + + +Fixes since v2.17 +----------------- + + * "git shortlog cruft" aborted with a BUG message when run outside a + Git repository. The command has been taught to complain about + extra and unwanted arguments on its command line instead in such a + case. + (merge 4aa0161e83 ma/shortlog-revparse later to maint). + + * "git stash push -u -- <pathspec>" gave an unnecessary and confusing + error message when there was no tracked files that match the + <pathspec>, which has been fixed. + (merge 353278687e tg/stash-untracked-with-pathspec-fix later to maint). + + * "git tag --contains no-such-commit" gave a full list of options + after giving an error message. + (merge 3bb0923f06 ps/contains-id-error-message later to maint). + + * "diff-highlight" filter (in contrib/) learned to undertand "git log + --graph" output better. + (merge 4551fbba14 jk/diff-highlight-graph-fix later to maint). + + * when refs that do not point at committish are given, "git + filter-branch" gave a misleading error messages. This has been + corrected. + (merge f78ab355e7 yk/filter-branch-non-committish-refs later to maint). + + * "git submodule status" misbehaved on a submodule that has been + removed from the working tree. + (merge 74b6bda32f rs/status-with-removed-submodule later to maint). + + * When credential helper exits very quickly without reading its + input, it used to cause Git to die with SIGPIPE, which has been + fixed. + (merge a0d51e8d0e eb/cred-helper-ignore-sigpipe later to maint). + + * Other minor doc, test and build updates and code cleanups. + (merge 248f66ed8e nd/trace-with-env later to maint). + (merge 14ced5562c ys/bisect-object-id-missing-conversion-fix later to maint). + (merge 5988eb631a ab/doc-hash-brokenness later to maint). + (merge a4d4e32a70 pk/test-avoid-pipe-hiding-exit-status later to maint). diff --git a/Documentation/config.txt b/Documentation/config.txt index 4e0cff8..2659153 100644 --- a/Documentation/config.txt +++ b/Documentation/config.txt @@ -1957,6 +1957,7 @@ http.sslVersion:: - tlsv1.0 - tlsv1.1 - tlsv1.2 + - tlsv1.3 + Can be overridden by the `GIT_SSL_VERSION` environment variable. diff --git a/Documentation/git-filter-branch.txt b/Documentation/git-filter-branch.txt index 3a52e4d..b634043 100644 --- a/Documentation/git-filter-branch.txt +++ b/Documentation/git-filter-branch.txt @@ -222,6 +222,14 @@ this purpose, they are instead rewritten to point at the nearest ancestor that was not excluded. +EXIT STATUS +----------- + +On success, the exit status is `0`. If the filter can't find any commits to +rewrite, the exit status is `2`. On any other error, the exit status may be +any other non-zero value. + + Examples -------- diff --git a/Documentation/git-gc.txt b/Documentation/git-gc.txt index 571b5a7..3126e0d 100644 --- a/Documentation/git-gc.txt +++ b/Documentation/git-gc.txt @@ -15,8 +15,9 @@ DESCRIPTION ----------- Runs a number of housekeeping tasks within the current repository, such as compressing file revisions (to reduce disk space and increase -performance) and removing unreachable objects which may have been -created from prior invocations of 'git add'. +performance), removing unreachable objects which may have been +created from prior invocations of 'git add', packing refs, pruning +reflog, rerere metadata or stale working trees. Users are encouraged to run this task on a regular basis within each repository to maintain good disk space utilization and good @@ -45,20 +46,25 @@ OPTIONS With this option, 'git gc' checks whether any housekeeping is required; if not, it exits without performing any work. Some git commands run `git gc --auto` after performing - operations that could create many loose objects. + operations that could create many loose objects. Housekeeping + is required if there are too many loose objects or too many + packs in the repository. + -Housekeeping is required if there are too many loose objects or -too many packs in the repository. If the number of loose objects -exceeds the value of the `gc.auto` configuration variable, then -all loose objects are combined into a single pack using -`git repack -d -l`. Setting the value of `gc.auto` to 0 -disables automatic packing of loose objects. +If the number of loose objects exceeds the value of the `gc.auto` +configuration variable, then all loose objects are combined into a +single pack using `git repack -d -l`. Setting the value of `gc.auto` +to 0 disables automatic packing of loose objects. + If the number of packs exceeds the value of `gc.autoPackLimit`, then existing packs (except those marked with a `.keep` file) are consolidated into a single pack by using the `-A` option of 'git repack'. Setting `gc.autoPackLimit` to 0 disables automatic consolidation of packs. ++ +If houskeeping is required due to many loose objects or packs, all +other housekeeping tasks (e.g. rerere, working trees, reflog...) will +be performed as well. + --prune=<date>:: Prune loose objects older than date (default is 2 weeks ago, @@ -133,6 +139,10 @@ The optional configuration variable `gc.pruneExpire` controls how old the unreferenced loose objects have to be before they are pruned. The default is "2 weeks ago". +Optional configuration variable `gc.worktreePruneExpire` controls how +old a stale working tree should be before `git worktree prune` deletes +it. Default is "3 months ago". + Notes ----- diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt index 3277ca1..dd85206 100644 --- a/Documentation/git-rebase.txt +++ b/Documentation/git-rebase.txt @@ -364,9 +364,10 @@ default is `--no-fork-point`, otherwise the default is `--fork-point`. Incompatible with the --interactive option. --signoff:: - This flag is passed to 'git am' to sign off all the rebased - commits (see linkgit:git-am[1]). Incompatible with the - --interactive option. + Add a Signed-off-by: trailer to all the rebased commits. Note + that if `--interactive` is given then only commits marked to be + picked, edited or reworded will have the trailer added. Incompatible + with the `--preserve-merges` option. -i:: --interactive:: diff --git a/Documentation/git-shortlog.txt b/Documentation/git-shortlog.txt index ee6c547..5e35ea1 100644 --- a/Documentation/git-shortlog.txt +++ b/Documentation/git-shortlog.txt @@ -8,8 +8,8 @@ git-shortlog - Summarize 'git log' output SYNOPSIS -------- [verse] -git log --pretty=short | 'git shortlog' [<options>] 'git shortlog' [<options>] [<revision range>] [[\--] <path>...] +git log --pretty=short | 'git shortlog' [<options>] DESCRIPTION ----------- diff --git a/Documentation/git-svn.txt b/Documentation/git-svn.txt index 636e090..d59379e 100644 --- a/Documentation/git-svn.txt +++ b/Documentation/git-svn.txt @@ -635,7 +635,8 @@ config key: svn.findcopiesharder -A<filename>:: --authors-file=<filename>:: - Syntax is compatible with the file used by 'git cvsimport': + Syntax is compatible with the file used by 'git cvsimport' but + an empty email address can be supplied with '<>': + ------------------------------------------------------------------------ loginname = Joe User <user@example.com> @@ -654,8 +655,14 @@ config key: svn.authorsfile If this option is specified, for each SVN committer name that does not exist in the authors file, the given file is executed with the committer name as the first argument. The program is - expected to return a single line of the form "Name <email>", - which will be treated as if included in the authors file. + expected to return a single line of the form "Name <email>" or + "Name <>", which will be treated as if included in the authors + file. ++ +Due to historical reasons a relative 'filename' is first searched +relative to the current directory for 'init' and 'clone' and relative +to the root of the working tree for 'fetch'. If 'filename' is +not found, it is searched like any other command in '$PATH'. + [verse] config key: svn.authorsProg diff --git a/Documentation/gitrepository-layout.txt b/Documentation/gitrepository-layout.txt index c60bcad..e85148f 100644 --- a/Documentation/gitrepository-layout.txt +++ b/Documentation/gitrepository-layout.txt @@ -275,11 +275,6 @@ worktrees/<id>/locked:: or manually by `git worktree prune`. The file may contain a string explaining why the repository is locked. -worktrees/<id>/link:: - If this file exists, it is a hard link to the linked .git - file. It is used to detect if the linked repository is - manually removed. - SEE ALSO -------- linkgit:git-init[1], diff --git a/Documentation/howto/recover-corrupted-object-harder.txt b/Documentation/howto/recover-corrupted-object-harder.txt index 9c4cd09..8994e25 100644 --- a/Documentation/howto/recover-corrupted-object-harder.txt +++ b/Documentation/howto/recover-corrupted-object-harder.txt @@ -80,7 +80,7 @@ valid pack like: # now add our object data cat object >>tmp.pack # and then append the pack trailer - /path/to/git.git/test-sha1 -b <tmp.pack >trailer + /path/to/git.git/t/helper/test-tool sha1 -b <tmp.pack >trailer cat trailer >>tmp.pack ------------ diff --git a/Documentation/technical/hash-function-transition.txt b/Documentation/technical/hash-function-transition.txt index 417ba49..4ab6cd1 100644 --- a/Documentation/technical/hash-function-transition.txt +++ b/Documentation/technical/hash-function-transition.txt @@ -28,11 +28,30 @@ advantages: address stored content. Over time some flaws in SHA-1 have been discovered by security -researchers. https://shattered.io demonstrated a practical SHA-1 hash -collision. As a result, SHA-1 cannot be considered cryptographically -secure any more. This impacts the communication of hash values because -we cannot trust that a given hash value represents the known good -version of content that the speaker intended. +researchers. On 23 February 2017 the SHAttered attack +(https://shattered.io) demonstrated a practical SHA-1 hash collision. + +Git v2.13.0 and later subsequently moved to a hardened SHA-1 +implementation by default, which isn't vulnerable to the SHAttered +attack. + +Thus Git has in effect already migrated to a new hash that isn't SHA-1 +and doesn't share its vulnerabilities, its new hash function just +happens to produce exactly the same output for all known inputs, +except two PDFs published by the SHAttered researchers, and the new +implementation (written by those researchers) claims to detect future +cryptanalytic collision attacks. + +Regardless, it's considered prudent to move past any variant of SHA-1 +to a new hash. There's no guarantee that future attacks on SHA-1 won't +be published in the future, and those attacks may not have viable +mitigations. + +If SHA-1 and its variants were to be truly broken, Git's hash function +could not be considered cryptographically secure any more. This would +impact the communication of hash values because we could not trust +that a given hash value represented the known good version of content +that the speaker intended. SHA-1 still possesses the other properties such as fast object lookup and safe error checking, but other hash functions are equally suitable @@ -116,10 +135,15 @@ Documentation/technical/repository-version.txt) with extensions objectFormat = newhash compatObjectFormat = sha1 -Specifying a repository format extension ensures that versions of Git -not aware of NewHash do not try to operate on these repositories, -instead producing an error message: +The combination of setting `core.repositoryFormatVersion=1` and +populating `extensions.*` ensures that all versions of Git later than +`v0.99.9l` will die instead of trying to operate on the NewHash +repository, instead producing an error message. + # Between v0.99.9l and v2.7.0 + $ git status + fatal: Expected git repo version <= 0, found 1 + # After v2.7.0 $ git status fatal: unknown repository extensions found: objectformat |