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Jeff King cf3c635210 alternates: accept double-quoted paths 
We read lists of alternates from objects/info/alternates
files (delimited by newline), as well as from the
GIT_ALTERNATE_OBJECT_DIRECTORIES environment variable
(delimited by colon or semi-colon, depending on the
platform).

There's no mechanism for quoting the delimiters, so it's
impossible to specify an alternate path that contains a
colon in the environment, or one that contains a newline in
a file. We've lived with that restriction for ages because
both alternates and filenames with colons are relatively
rare, and it's only a problem when the two meet. But since
722ff7f87 (receive-pack: quarantine objects until
pre-receive accepts, 2016-10-03), which builds on the
alternates system, every push causes the receiver to set
GIT_ALTERNATE_OBJECT_DIRECTORIES internally.

It would be convenient to have some way to quote the
delimiter so that we can represent arbitrary paths.

The simplest thing would be an escape character before a
quoted delimiter (e.g., "\:" as a literal colon). But that
creates a backwards compatibility problem: any path which
uses that escape character is now broken, and we've just
shifted the problem. We could choose an unlikely escape
character (e.g., something from the non-printable ASCII
range), but that's awkward to use.

Instead, let's treat names as unquoted unless they begin
with a double-quote, in which case they are interpreted via
our usual C-stylke quoting rules. This also breaks
backwards-compatibility, but in a smaller way: it only
matters if your file has a double-quote as the very _first_
character in the path (whereas an escape character is a
problem anywhere in the path).  It's also consistent with
many other parts of git, which accept either a bare pathname
or a double-quoted one, and the sender can choose to quote
or not as required.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-12-12 15:10:43 -08:00
..
howto new-command.txt: correct the command description file 2016-06-27 06:11:57 -07:00
RelNotes Sync with 2.10.1 2016-10-03 13:32:41 -07:00
technical Merge branch 'ls/packet-line-protocol-doc-fix' into maint 2016-09-08 21:35:57 -07:00
.gitattributes
.gitignore
asciidoc.conf
blame-options.txt Merge branch 'ea/blame-progress' 2016-01-12 15:16:54 -08:00
build-docdep.perl
cat-texi.perl
cmd-list.perl
CodingGuidelines CodingGuidelines: formatting HEAD in documentation 2016-06-28 08:36:45 -07:00
config.txt Merge branch 'mm/config-color-ui-default-to-auto' into maint 2016-09-29 16:49:42 -07:00
date-formats.txt doc: more consistency in environment variables format 2016-06-08 12:04:37 -07:00
diff-config.txt Merge branch 'mh/diff-indent-heuristic' 2016-09-26 16:09:16 -07:00
diff-format.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
diff-generate-patch.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
diff-heuristic-options.txt blame: honor the diff heuristic options and config 2016-09-19 10:25:11 -07:00
diff-options.txt Merge branch 'mh/diff-indent-heuristic' 2016-09-26 16:09:16 -07:00
docbook-xsl.css
docbook.xsl
everyday.txto Documentation: fix linkgit references 2016-05-09 15:44:14 -07:00
fetch-options.txt Merge branch 'mm/doc-tt' into maint 2016-07-28 11:25:54 -07:00
fix-texi.perl
fmt-merge-msg-config.txt
git-add.txt add: document the chmod option 2016-09-12 15:03:32 -07:00
git-am.txt Merge branch 'mm/doc-tt' 2016-07-13 11:24:14 -07:00
git-annotate.txt blame: honor the diff heuristic options and config 2016-09-19 10:25:11 -07:00
git-apply.txt git-apply.txt: mention the behavior inside a subdir 2016-03-24 10:16:52 -07:00
git-archimport.txt
git-archive.txt
git-bisect-lk2009.txt doc: more consistency in environment variables format 2016-06-08 12:04:37 -07:00
git-bisect.txt doc: typeset HEAD and variants as literal 2016-06-28 08:36:45 -07:00
git-blame.txt blame: honor the diff heuristic options and config 2016-09-19 10:25:11 -07:00
git-branch.txt doc: typeset HEAD and variants as literal 2016-06-28 08:36:45 -07:00
git-bundle.txt transport: drop support for git-over-rsync 2016-02-01 13:07:41 -08:00
git-cat-file.txt cat-file: support --textconv/--filters in batch mode 2016-09-11 14:48:15 -07:00
git-check-attr.txt usage: do not insist that standard input must come from a file 2015-10-16 15:27:52 -07:00
git-check-ignore.txt Documentation: fix linkgit references 2016-05-09 15:44:14 -07:00
git-check-mailmap.txt
git-check-ref-format.txt git-check-ref-format.txt: fixup documentation 2016-09-21 11:12:41 -07:00
git-checkout-index.txt
git-checkout.txt checkout.txt: document a common case that ignores ambiguation rules 2016-09-21 08:44:41 -07:00
git-cherry-pick.txt Merge branch 'mm/doc-tt' into maint 2016-07-28 11:25:54 -07:00
git-cherry.txt
git-citool.txt
git-clean.txt doc: typeset short command-line options as literal 2016-06-28 08:20:52 -07:00
git-clone.txt clone: implement optional references 2016-08-15 15:28:45 -07:00
git-column.txt
git-commit-tree.txt Merge branch 'mm/doc-tt' into maint 2016-07-28 11:25:54 -07:00
git-commit.txt Merge branch 'mm/doc-tt' into maint 2016-07-28 11:25:54 -07:00
git-config.txt Merge branch 'dg/document-git-c-in-git-config-doc' into maint 2016-09-08 21:35:56 -07:00
git-count-objects.txt count-objects: report alternates via verbose mode 2016-10-10 13:52:37 -07:00
git-credential-cache--daemon.txt credential-cache: close stderr in daemon process 2014-09-16 11:11:58 -07:00
git-credential-cache.txt credential-cache--daemon: disallow relative socket path 2016-02-23 12:56:27 -08:00
git-credential-store.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-credential.txt
git-cvsexportcommit.txt
git-cvsimport.txt Merge branch 'jk/doc-cvs-update' into maint 2016-10-03 13:22:25 -07:00
git-cvsserver.txt doc: typeset HEAD and variants as literal 2016-06-28 08:36:45 -07:00
git-daemon.txt doc: typeset HEAD and variants as literal 2016-06-28 08:36:45 -07:00
git-describe.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-diff-files.txt
git-diff-index.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-diff-tree.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-diff.txt
git-difftool.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-fast-export.txt
git-fast-import.txt Merge branch 'mm/doc-tt' 2016-07-13 11:24:14 -07:00
git-fetch-pack.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-fetch.txt fetch: reduce duplicate in ref update status lines with placeholder 2016-07-06 11:48:25 -07:00
git-filter-branch.txt doc: typeset '--' as literal 2016-06-28 08:36:45 -07:00
git-fmt-merge-msg.txt usage: do not insist that standard input must come from a file 2015-10-16 15:27:52 -07:00
git-for-each-ref.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-format-patch.txt format-patch: add "--rfc" for the common case of [RFC PATCH] 2016-09-21 08:58:10 -07:00
git-fsck-objects.txt
git-fsck.txt fsck: optionally show more helpful info for broken links 2016-07-18 15:15:59 -07:00
git-gc.txt doc: change configuration variables format 2016-06-08 12:04:55 -07:00
git-get-tar-commit-id.txt usage: do not insist that standard input must come from a file 2015-10-16 15:27:52 -07:00
git-grep.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-gui.txt doc: typeset HEAD and variants as literal 2016-06-28 08:36:45 -07:00
git-hash-object.txt usage: do not insist that standard input must come from a file 2015-10-16 15:27:52 -07:00
git-help.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-http-backend.txt doc: more consistency in environment variables format 2016-06-08 12:04:37 -07:00
git-http-fetch.txt
git-http-push.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-imap-send.txt
git-index-pack.txt index-pack: add --max-input-size=<size> option 2016-08-24 12:31:05 -07:00
git-init-db.txt
git-init.txt Merge branch 'tr/doc-tt' into maint 2016-07-06 13:06:34 -07:00
git-instaweb.txt doc: change configuration variables format 2016-06-08 12:04:55 -07:00
git-interpret-trailers.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-log.txt Merge branch 'mj/log-show-signature-conf' 2016-07-11 10:31:08 -07:00
git-ls-files.txt git ls-files: text=auto eol=lf is supported in Git 2.10 2016-08-25 13:38:18 -07:00
git-ls-remote.txt ls-remote: add support for showing symrefs 2016-01-19 10:07:56 -08:00
git-ls-tree.txt doc: typeset HEAD and variants as literal 2016-06-28 08:36:45 -07:00
git-mailinfo.txt Merge branch 'va/mailinfo-doc-typofix' into maint 2016-05-26 13:17:14 -07:00
git-mailsplit.txt mailsplit: support unescaping mboxrd messages 2016-06-06 11:14:43 -07:00
git-merge-base.txt
git-merge-file.txt merge-file: clamp exit code to maximum 127 2015-10-29 12:10:23 -07:00
git-merge-index.txt
git-merge-one-file.txt
git-merge-tree.txt
git-merge.txt pull: pass --allow-unrelated-histories to "git merge" 2016-04-21 11:58:51 -07:00
git-mergetool--lib.txt
git-mergetool.txt
git-mktag.txt usage: do not insist that standard input must come from a file 2015-10-16 15:27:52 -07:00
git-mktree.txt doc: typeset short command-line options as literal 2016-06-28 08:20:52 -07:00
git-mv.txt doc: typeset short command-line options as literal 2016-06-28 08:20:52 -07:00
git-name-rev.txt
git-notes.txt doc: typeset short command-line options as literal 2016-06-28 08:20:52 -07:00
git-p4.txt Merge branch 'mm/doc-tt' into maint 2016-07-28 11:25:54 -07:00
git-pack-objects.txt document git-repack interaction of pack.threads and pack.windowMemory 2016-08-10 10:55:13 -07:00
git-pack-redundant.txt
git-pack-refs.txt
git-parse-remote.txt
git-patch-id.txt usage: do not insist that standard input must come from a file 2015-10-16 15:27:52 -07:00
git-prune-packed.txt
git-prune.txt
git-pull.txt pull --rebase: add --[no-]autostash flag 2016-03-21 13:30:36 -07:00
git-push.txt Merge branch 'jk/push-force-with-lease-creation' into maint 2016-09-08 21:35:53 -07:00
git-quiltimport.txt doc: more consistency in environment variables format 2016-06-08 12:04:37 -07:00
git-read-tree.txt
git-rebase.txt Merge branch 'mm/doc-tt' into maint 2016-07-28 11:25:54 -07:00
git-receive-pack.txt receive-pack: allow a maximum input size to be specified 2016-08-24 12:31:05 -07:00
git-reflog.txt git-reflog: add exists command 2015-07-21 14:08:14 -07:00
git-relink.txt
git-remote-ext.txt
git-remote-fd.txt Spelling fixes 2016-08-11 14:35:42 -07:00
git-remote-helpers.txto
git-remote-testgit.txt
git-remote.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-repack.txt Merge branch 'ms/document-pack-window-memory-is-per-thread' 2016-08-12 09:47:35 -07:00
git-replace.txt doc: change environment variables format 2016-06-08 12:04:37 -07:00
git-request-pull.txt doc: show usage of branch description 2015-09-14 12:50:33 -07:00
git-rerere.txt
git-reset.txt
git-rev-list.txt Merge branch 'jk/date-local' 2015-10-05 12:30:13 -07:00
git-rev-parse.txt
git-revert.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-rm.txt
git-send-email.txt Merge branch 'mm/doc-tt' into maint 2016-07-28 11:25:54 -07:00
git-send-pack.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-sh-i18n--envsubst.txt
git-sh-i18n.txt
git-sh-setup.txt doc: more consistency in environment variables format 2016-06-08 12:04:37 -07:00
git-shell.txt doc: typeset short command-line options as literal 2016-06-28 08:20:52 -07:00
git-shortlog.txt
git-show-branch.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-show-index.txt usage: do not insist that standard input must come from a file 2015-10-16 15:27:52 -07:00
git-show-ref.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-show.txt
git-stage.txt
git-stash.txt stash: allow "stash show" diff output configurable 2015-08-31 11:29:04 -07:00
git-status.txt git-status.txt: describe --porcelain=v2 format 2016-08-11 11:15:56 -07:00
git-stripspace.txt usage: do not insist that standard input must come from a file 2015-10-16 15:27:52 -07:00
git-submodule.txt submodule update: learn --[no-]recommend-shallow option 2016-05-27 10:40:46 -07:00
git-svn.txt Merge branch 'mm/doc-tt' into maint 2016-07-28 11:25:54 -07:00
git-symbolic-ref.txt
git-tag.txt Merge branch 'mm/doc-tt' into maint 2016-07-28 11:25:54 -07:00
git-tools.txt Documentation/git-tools: retire manually-maintained list 2015-07-28 13:21:59 -07:00
git-unpack-file.txt
git-unpack-objects.txt unpack-objects: add --max-input-size=<size> option 2016-08-24 12:31:05 -07:00
git-update-index.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-update-ref.txt update-ref and tag: add --create-reflog arg 2015-07-21 14:08:35 -07:00
git-update-server-info.txt
git-upload-archive.txt Documentation: match underline with the text 2015-10-22 10:16:12 -07:00
git-upload-pack.txt upload-pack.c: use parse-options API 2016-05-31 10:17:20 -07:00
git-var.txt
git-verify-commit.txt Merge branch 'dn/gpg-doc' into maint 2016-07-06 13:06:36 -07:00
git-verify-pack.txt
git-verify-tag.txt
git-web--browse.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
git-whatchanged.txt
git-worktree.txt Merge branch 'nd/worktree-lock' 2016-07-28 10:34:42 -07:00
git-write-tree.txt
git.txt alternates: accept double-quoted paths 2016-12-12 15:10:43 -08:00
gitattributes.txt Merge branch 'jc/renormalize-merge-kill-safer-crlf' into maint 2016-09-08 21:35:52 -07:00
gitcli.txt
gitcore-tutorial.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
gitcredentials.txt credential: let empty credential specs reset helper list 2016-02-26 10:58:14 -08:00
gitcvs-migration.txt docs/cvs-migration: mention cvsimport caveats 2016-09-22 11:23:45 -07:00
gitdiffcore.txt doc: typeset long command-line options as literal 2016-06-28 08:36:45 -07:00
giteveryday.txt Documentation/everyday: match undefline with the text 2015-10-22 10:14:44 -07:00
gitglossary.txt
githooks.txt push options: {pre,post}-receive hook learns about push options 2016-07-14 15:50:17 -07:00
gitignore.txt doc: change configuration variables format 2016-06-08 12:04:55 -07:00
gitk.txt Merge branch 'po/range-doc' into maint 2016-09-19 13:51:38 -07:00
gitmodules.txt Spelling fixes 2016-08-11 14:35:42 -07:00
gitnamespaces.txt
gitremote-helpers.txt doc: typeset HEAD and variants as literal 2016-06-28 08:36:45 -07:00
gitrepository-layout.txt
gitrevisions.txt doc: gitrevisions - clarify 'latter case' is revision walk 2016-08-13 19:36:44 -07:00
gittutorial-2.txt
gittutorial.txt transport: drop support for git-over-rsync 2016-02-01 13:07:41 -08:00
gitweb.conf.txt gitweb: use highlight's shebang detection 2016-09-25 16:39:11 -07:00
gitweb.txt doc: change environment variables format 2016-06-08 12:04:37 -07:00
gitworkflows.txt
glossary-content.txt Merge branch 'rn/glossary-typofix' into HEAD 2016-05-18 14:40:14 -07:00
howto-index.sh
i18n.txt
install-doc-quick.sh
install-webdoc.sh
line-range-format.txt
lint-gitlink.perl ci: validate "linkgit:" in documentation 2016-05-10 11:15:04 -07:00
mailmap.txt
Makefile Documentation/technical: describe signature formats 2016-06-17 11:39:05 -07:00
manpage-1.72.xsl
manpage-base-url.xsl.in
manpage-base.xsl
manpage-bold-literal.xsl
manpage-normal.xsl
manpage-quote-apos.xsl
manpage-suppress-sp.xsl
merge-config.txt doc: change environment variables format 2016-06-08 12:04:37 -07:00
merge-options.txt Merge branch 'kf/gpg-sig-verification-doc' 2016-05-17 14:38:39 -07:00
merge-strategies.txt merge-strategies.txt: fix typo 2016-02-22 10:42:52 -08:00
pretty-formats.txt Merge branch 'po/range-doc' into maint 2016-09-19 13:51:38 -07:00
pretty-options.txt Merge branch 'tr/doc-tt' into maint 2016-07-06 13:06:34 -07:00
pull-fetch-param.txt
rev-list-options.txt Merge branch 'pb/rev-list-reverse-with-count' 2016-10-03 13:30:39 -07:00
revisions.txt Merge branch 'po/range-doc' into maint 2016-09-19 13:51:38 -07:00
sequencer.txt
SubmittingPatches SubmittingPatches: use gitk's "Copy commit summary" format 2016-08-26 15:58:10 -07:00
urls-remotes.txt Documentation: match underline with the text 2015-10-22 10:16:12 -07:00
urls.txt transport: drop support for git-over-rsync 2016-02-01 13:07:41 -08:00
user-manual.conf
user-manual.txt documentation: fix some typos 2016-03-03 13:43:36 -08:00