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Patrick Steinhardt 4179b4897f config: allow overriding of global and system configuration 
In order to have git run in a fully controlled environment without any
misconfiguration, it may be desirable for users or scripts to override
global- and system-level configuration files. We already have a way of
doing this, which is to unset both HOME and XDG_CONFIG_HOME environment
variables and to set `GIT_CONFIG_NOGLOBAL=true`. This is quite kludgy,
and unsetting the first two variables likely has an impact on other
executables spawned by such a script.

The obvious way to fix this would be to introduce `GIT_CONFIG_NOGLOBAL`
as an equivalent to `GIT_CONFIG_NOSYSTEM`. But in the past, it has
turned out that this design is inflexible: we cannot test system-level
parsing of the git configuration in our test harness because there is no
way to change its location, so all tests run with `GIT_CONFIG_NOSYSTEM`
set.

Instead of doing the same mistake with `GIT_CONFIG_NOGLOBAL`, introduce
two new variables `GIT_CONFIG_GLOBAL` and `GIT_CONFIG_SYSTEM`:

    - If unset, git continues to use the usual locations.

    - If set to a specific path, we skip reading the normal
      configuration files and instead take the path. By setting the path
      to `/dev/null`, no configuration will be loaded for the respective
      level.

This implements the usecase where we want to execute code in a sanitized
environment without any potential misconfigurations via `/dev/null`, but
is more flexible and allows for more usecases than simply adding
`GIT_CONFIG_NOGLOBAL`.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-19 14:16:59 -07:00
..
config
Merge branch 'll/clone-reject-shallow'
2021-04-08 13:23:25 -07:00
howto
Document how we do embargoed releases
2021-03-27 15:13:12 -07:00
RelNotes
The eighth batch
2021-04-08 13:23:26 -07:00
technical
Merge branch 'tb/reverse-midx'
2021-04-08 13:23:25 -07:00
.gitattributes
…
.gitignore
Merge branch 'js/misc-doc-fixes'
2019-05-09 00:37:27 +09:00
asciidoc.conf
Doc: drop support for docbook-xsl before 1.72.0
2020-03-29 09:25:38 -07:00
asciidoctor-extensions.rb
Merge branch 'ma/user-manual-markup-update'
2019-10-06 12:25:16 +09:00
blame-options.txt
blame-options.txt: camelcase blame.blankBoundary
2021-02-24 15:21:25 -08:00
build-docdep.perl
…
cat-texi.perl
…
cmd-list.perl
git.txt: add list of guides
2020-08-04 18:34:02 -07:00
CodingGuidelines
Merge branch 'dl/python-2.7-is-the-floor-version'
2020-06-17 21:54:05 -07:00
config.txt
Merge branch 'km/config-doc-typofix'
2021-03-19 15:25:38 -07:00
date-formats.txt
doc: mention approxidates for git-commit --date
2021-02-23 13:33:02 -08:00
diff-format.txt
doc: indent multi-line items in list
2019-12-13 12:18:07 -08:00
diff-generate-patch.txt
doc/diff-generate-patch: mention new --diff-merges option
2020-12-21 13:47:32 -08:00
diff-options.txt
diff: --{rotate,skip}-to=<path>
2021-02-16 09:30:42 -08:00
doc-diff
doc-diff: use single-colon rule in rendering Makefile
2020-02-18 13:53:30 -08:00
docbook-xsl.css
…
docbook.xsl
…
everyday.txto
…
fetch-options.txt
fetch: implement support for atomic reference updates
2021-01-12 12:06:15 -08:00
fix-texi.perl
…
git-add.txt
add: support the --pathspec-from-file option
2019-12-04 10:10:37 -08:00
git-am.txt
i18n.txt: camel case and monospace "i18n.commitEncoding"
2021-02-24 15:21:25 -08:00
git-annotate.txt
…
git-apply.txt
git-apply.txt: update descriptions of --cached, --index
2020-08-20 16:34:37 -07:00
git-archimport.txt
…
git-archive.txt
archive: add --add-file
2020-09-19 15:56:06 -07:00
git-bisect-lk2009.txt
git-bisect-lk2009: make continuation of list indented
2020-10-08 14:01:15 -07:00
git-bisect.txt
bisect: swap command-line options in documentation
2020-08-28 14:06:06 -07:00
git-blame.txt
mailmap doc: create a new "gitmailmap(5)" man page
2021-01-12 14:04:39 -08:00
git-branch.txt
Merge branch 'jc/maint-column-doc-typofix'
2021-02-25 16:43:30 -08:00
git-bugreport.txt
Merge branch 'es/bugreport-shell'
2020-06-08 18:06:28 -07:00
git-bundle.txt
bundle: add new version for use with SHA-256
2020-07-30 09:16:48 -07:00
git-cat-file.txt
git-cat-file.txt: remove references to "sha1"
2021-03-03 16:43:06 -08:00
git-check-attr.txt
Documentation: fix a bunch of typos, both old and new
2019-11-07 13:42:00 +09:00
git-check-ignore.txt
Merge branch 'en/check-ignore' into maint
2020-03-17 15:02:23 -07:00
git-check-mailmap.txt
check-mailmap doc: note config options
2021-01-12 14:04:40 -08:00
git-check-ref-format.txt
doc: promote "git switch"
2019-04-02 13:57:00 +09:00
git-checkout-index.txt
…
git-checkout.txt
Merge branch 'dl/checkout-guess'
2020-10-27 15:09:51 -07:00
git-cherry-pick.txt
Documentation: stylistically normalize references to Signed-off-by:
2020-10-20 11:57:40 -07:00
git-cherry.txt
…
git-citool.txt
…
git-clean.txt
Merge branch 'en/clean-nested-with-ignored'
2019-10-11 14:24:46 +09:00
git-clone.txt
builtin/clone.c: add --reject-shallow option
2021-04-01 12:58:58 -07:00
git-column.txt
…
git-commit-graph.txt
Merge branch 'ds/commit-graph-merging-fix'
2020-11-02 13:17:39 -08:00
git-commit-tree.txt
Documentation: merge commit-tree --[no-]gpg-sign
2020-04-03 11:37:22 -07:00
git-commit.txt
Merge branch 'zh/commit-trailer'
2021-04-07 16:54:08 -07:00
git-config.txt
config: allow overriding of global and system configuration
2021-04-19 14:16:59 -07:00
git-count-objects.txt
…
git-credential-cache--daemon.txt
…
git-credential-cache.txt
…
git-credential-store.txt
Merge branch 'cb/credential-store-ignore-bogus-lines'
2020-05-08 14:25:01 -07:00
git-credential.txt
git-credential.txt: use list continuation
2020-05-18 13:19:33 -07:00
git-cvsexportcommit.txt
…
git-cvsimport.txt
…
git-cvsserver.txt
Documentation: fix a bunch of typos, both old and new
2019-11-07 13:42:00 +09:00
git-daemon.txt
doc: format pathnames and URLs as monospace.
2019-03-13 11:14:22 +09:00
git-describe.txt
describe doc: remove '7-char' abbreviation reference
2019-04-08 17:24:51 +09:00
git-diff-files.txt
…
git-diff-index.txt
builtin/diff-index: learn --merge-base
2020-09-20 21:30:26 -07:00
git-diff-tree.txt
builtin/diff-tree: learn --merge-base
2020-09-21 13:37:03 -07:00
git-diff.txt
builtin/diff-tree: learn --merge-base
2020-09-21 13:37:03 -07:00
git-difftool.txt
difftool.c: learn a new way start at specified file
2021-02-22 13:35:49 -08:00
git-fast-export.txt
fast-export: allow seeding the anonymized mapping
2020-06-25 14:19:23 -07:00
git-fast-import.txt
fast-import: fix typo in documentation
2020-10-04 12:56:29 -07:00
git-fetch-pack.txt
…
git-fetch.txt
fetch: allow refspecs specified through stdin
2020-08-18 13:25:05 -07:00
git-filter-branch.txt
filter-branch doc: fix filter-repo typo
2020-10-20 12:22:25 -07:00
git-fmt-merge-msg.txt
…
git-for-each-ref.txt
ref-filter: use pretty.c logic for trailers
2021-02-15 16:48:38 -08:00
git-for-each-repo.txt
for-each-repo: run subcommands on configured repos
2020-09-25 10:59:44 -07:00
git-format-patch.txt
Merge branch 'zh/format-patch-fractional-reroll-count'
2021-04-02 14:43:14 -07:00
git-fsck-objects.txt
…
git-fsck.txt
fsck doc: remove ancient out-of-date diagnostics
2021-01-20 19:10:42 -08:00
git-gc.txt
docs: clarify that refs/notes/ do not keep the attached objects alive
2021-02-10 23:43:55 -08:00
git-get-tar-commit-id.txt
…
git-grep.txt
doc: add more pointers to gitattributes(5) for userdiff
2020-11-01 15:54:14 -08:00
git-gui.txt
Documentation: update the location of the git-gui repo
2019-10-06 09:45:02 +09:00
git-hash-object.txt
hash-object doc: stop mentioning git-cvsimport
2019-05-28 10:47:42 -07:00
git-help.txt
help: drop usage of 'common' and 'useful' for guides
2020-08-04 18:34:01 -07:00
git-http-backend.txt
Documentation: turn middle-of-line tabs into spaces
2019-03-07 09:25:32 +09:00
git-http-fetch.txt
http-fetch: allow custom index-pack args
2021-02-22 12:07:40 -08:00
git-http-push.txt
…
git-imap-send.txt
git-imap-send.txt: add note about localized Gmail folders
2020-08-31 11:44:33 -07:00
git-index-pack.txt
Merge branch 'jt/transfer-fsck-across-packs'
2021-03-01 14:02:57 -08:00
git-init-db.txt
…
git-init.txt
init: document init.defaultBranch better
2020-12-13 15:53:50 -08:00
git-instaweb.txt
…
git-interpret-trailers.txt
interpret-trailers.txt: start the desc line with a capital letter
2019-04-01 15:49:47 +09:00
git-log.txt
Merge branch 'so/log-diff-merge'
2021-02-05 16:40:44 -08:00
git-ls-files.txt
ls-files.c: add --deduplicate option
2021-01-23 11:48:20 -08:00
git-ls-remote.txt
docs: adjust for the recent rename of pu to seen
2020-06-25 09:18:53 -07:00
git-ls-tree.txt
doc: clarify that --abbrev=<n> is about the minimum length
2020-11-04 14:04:44 -08:00
git-mailinfo.txt
i18n.txt: camel case and monospace "i18n.commitEncoding"
2021-02-24 15:21:25 -08:00
git-mailsplit.txt
…
git-maintenance.txt
maintenance: add pack-refs task
2021-02-09 23:09:24 -08:00
git-merge-base.txt
git-merge-base.txt: render indentations correctly under Asciidoctor
2019-09-09 11:05:51 -07:00
git-merge-file.txt
…
git-merge-index.txt
git-merge-index.txt: wrap shell listing in "----"
2019-09-09 11:05:52 -07:00
git-merge-one-file.txt
…
git-merge-tree.txt
…
git-merge.txt
Doc: reference the "stash list" in autostash docs
2020-05-05 16:07:30 -07:00
git-mergetool--lib.txt
mergetool: break setup_tool out into separate initialization function
2021-02-09 14:09:16 -08:00
git-mergetool.txt
doc: describe mergetool configuration in git-mergetool(1)
2021-03-13 15:34:32 -08:00
git-mktag.txt
mktag: add a --[no-]strict option
2021-01-06 14:22:24 -08:00
git-mktree.txt
…
git-multi-pack-index.txt
midx: allow marking a pack as preferred
2021-04-01 13:07:37 -07:00
git-mv.txt
…
git-name-rev.txt
…
git-notes.txt
docs: improve the example that illustrates git-notes path names
2020-08-03 12:40:09 -07:00
git-p4.txt
doc: fix some typos
2021-01-04 11:27:48 -08:00
git-pack-objects.txt
Merge branch 'tb/geometric-repack'
2021-03-24 14:36:27 -07:00
git-pack-redundant.txt
…
git-pack-refs.txt
…
git-patch-id.txt
…
git-prune-packed.txt
…
git-prune.txt
…
git-pull.txt
Merge branch 'dl/merge-autostash'
2020-04-29 16:15:27 -07:00
git-push.txt
Documentation/git-push.txt: correct configuration typo
2021-03-13 15:41:45 -08:00
git-quiltimport.txt
…
git-range-diff.txt
Merge branch 'js/range-diff-one-side-only'
2021-02-17 17:21:41 -08:00
git-read-tree.txt
doc: --recurse-submodules mostly applies to active submodules
2020-04-06 13:42:43 -07:00
git-rebase.txt
doc/git-commit: add documentation for fixup=[amend|reword] options
2021-03-15 14:29:36 -07:00
git-receive-pack.txt
git-receive-pack.txt: wrap shell [script] listing in "----"
2019-09-09 11:05:52 -07:00
git-reflog.txt
…
git-remote-ext.txt
Merge branch 'js/check-docs-exe'
2019-04-22 11:14:46 +09:00
git-remote-fd.txt
docs: move gitremote-helpers into section 7
2019-04-01 14:00:53 +09:00
git-remote-helpers.txto
docs: move gitremote-helpers into section 7
2019-04-01 14:00:53 +09:00
git-remote.txt
remote: add meaningful exit code on missing/existing
2020-10-27 11:40:33 -07:00
git-repack.txt
Merge branch 'tb/geometric-repack'
2021-03-24 14:36:27 -07:00
git-replace.txt
Recommend git-filter-repo instead of git-filter-branch
2019-09-05 13:01:48 -07:00
git-request-pull.txt
…
git-rerere.txt
Merge branch 'nd/switch-and-restore'
2019-07-09 15:25:44 -07:00
git-reset.txt
doc: document --recurse-submodules for reset and restore
2020-04-06 13:42:43 -07:00
git-restore.txt
Doc: document "A...B" form for <tree-ish> in checkout and switch
2020-10-07 09:49:05 -07:00
git-rev-list.txt
docs/rev-list: add some examples of --disk-usage
2021-02-17 16:25:29 -08:00
git-rev-parse.txt
rev-parse: add option for absolute or relative path formatting
2020-12-12 23:35:51 -08:00
git-revert.txt
Documentation: stylistically normalize references to Signed-off-by:
2020-10-20 11:57:40 -07:00
git-rm.txt
rm: support the --pathspec-from-file option
2020-02-19 10:56:49 -08:00
git-send-email.txt
Merge branch 'vv/send-email-with-less-secure-apps-access' into maint
2021-02-05 16:31:25 -08:00
git-send-pack.txt
…
git-sh-i18n--envsubst.txt
…
git-sh-i18n.txt
…
git-sh-setup.txt
…
git-shell.txt
…
git-shortlog.txt
mailmap: only look for .mailmap in work tree
2021-02-10 13:34:51 -08:00
git-show-branch.txt
Documentation/git-show-branch: avoid literal {apostrophe}
2019-04-10 12:05:03 +09:00
git-show-index.txt
Documentation: mark --object-format=sha256 as experimental
2020-08-17 10:50:14 -07:00
git-show-ref.txt
…
git-show.txt
doc/git-show: include --diff-merges description
2020-12-21 13:47:32 -08:00
git-sparse-checkout.txt
Merge branch 'en/sparse-with-submodule-doc'
2020-06-22 15:55:03 -07:00
git-stage.txt
…
git-stash.txt
stash show: learn stash.showIncludeUntracked
2021-03-05 14:31:27 -08:00
git-status.txt
Documentation: typofix --column description
2021-02-19 19:36:47 -08:00
git-stripspace.txt
…
git-submodule.txt
submodule: fall back to remote's HEAD for missing remote.<name>.branch
2020-06-24 09:14:21 -07:00
git-svn.txt
Documentation: stylistically normalize references to Signed-off-by:
2020-10-20 11:57:40 -07:00
git-switch.txt
checkout: learn to respect checkout.guess
2020-10-08 09:25:29 -07:00
git-symbolic-ref.txt
…
git-tag.txt
Documentation: typofix --column description
2021-02-19 19:36:47 -08:00
git-tools.txt
…
git-unpack-file.txt
…
git-unpack-objects.txt
…
git-update-index.txt
doc: remove "directory cache" from man pages
2021-01-09 22:57:24 -08:00
git-update-ref.txt
update-ref: allow creation of multiple transactions
2020-11-16 13:44:01 -08:00
git-update-server-info.txt
update-server-info: avoid needless overwrites
2019-05-15 14:07:37 +09:00
git-upload-archive.txt
…
git-upload-pack.txt
…
git-var.txt
…
git-verify-commit.txt
…
git-verify-pack.txt
…
git-verify-tag.txt
…
git-web--browse.txt
doc: format pathnames and URLs as monospace.
2019-03-13 11:14:22 +09:00
git-whatchanged.txt
…
git-worktree.txt
worktree: teach list verbose mode
2021-01-30 09:57:40 -08:00
git-write-tree.txt
…
git.txt
config: allow overriding of global and system configuration
2021-04-19 14:16:59 -07:00
gitattributes.txt
archive: expand only a single %(describe) per archive
2021-03-11 13:22:44 -08:00
gitcli.txt
Merge branch 'jc/doc-single-h-is-for-help' into maint
2020-03-17 15:02:24 -07:00
gitcore-tutorial.txt
doc/gitcore-tutorial: fix prose to match example command
2020-01-08 08:56:40 -08:00
gitcredentials.txt
command-list.txt: add missing 'gitcredentials' and 'gitremote-helpers'
2020-08-04 18:34:01 -07:00
gitcvs-migration.txt
…
gitdiffcore.txt
Merge branch 'en/ort-perf-batch-8'
2021-03-22 14:00:24 -07:00
giteveryday.txt
docs: adjust for the recent rename of pu to seen
2020-06-25 09:18:53 -07:00
gitfaq.txt
docs: explain how to deal with files that are always modified
2020-09-20 21:29:02 -07:00
gitglossary.txt
…
githooks.txt
githooks.txt: clarify documentation on reference-transaction hook
2021-03-01 09:02:01 -08:00
gitignore.txt
doc: .gitignore documentation typofix
2021-03-03 17:16:48 -08:00
gitk.txt
doc: log, gitk: move '-L' description to 'line-range-options.txt'
2020-11-01 15:54:14 -08:00
gitmailmap.txt
gitmailmap.txt: fix rendering of e-mail addresses
2021-02-18 10:53:33 -08:00
gitmodules.txt
gitmodules.txt: fix 'GIT_WORK_TREE' variable name
2021-01-04 11:29:36 -08:00
gitnamespaces.txt
…
gitremote-helpers.txt
Merge branch 'bc/sha-256-part-2'
2020-07-06 22:09:13 -07:00
gitrepository-layout.txt
Merge branch 'sg/dir-trie-fixes'
2019-11-10 18:02:14 +09:00
gitrevisions.txt
…
gitsubmodules.txt
gitsubmodules doc: invoke 'ls-files' with '--recurse-submodules'
2020-10-04 12:54:07 -07:00
gittutorial-2.txt
doc: promote "git restore"
2019-05-07 13:04:48 +09:00
gittutorial.txt
doc: promote "git restore"
2019-05-07 13:04:48 +09:00
gitweb.conf.txt
gitweb.conf.txt: switch pluses to backticks to help Asciidoctor
2019-09-09 11:05:52 -07:00
gitweb.txt
doc: don't use git.kernel.org as example gitweb URL
2019-06-24 12:37:21 -07:00
gitworkflows.txt
gitworkflows.txt: fix broken subsection underline
2020-07-18 13:43:34 -07:00
glossary-content.txt
glossary: improve "branch" definition
2020-12-02 14:53:42 -08:00
howto-index.sh
…
i18n.txt
i18n.txt: camel case and monospace "i18n.commitEncoding"
2021-02-24 15:21:25 -08:00
install-doc-quick.sh
…
install-webdoc.sh
…
line-range-format.txt
doc: add more pointers to gitattributes(5) for userdiff
2020-11-01 15:54:14 -08:00
line-range-options.txt
blame-options.txt: also mention 'funcname' in '-L' description
2020-11-01 15:54:14 -08:00
lint-gitlink.perl
…
Makefile
Document how we do embargoed releases
2021-03-27 15:13:12 -07:00
manpage-base-url.xsl.in
…
manpage-bold-literal.xsl
manpage-bold-literal.xsl: stop using git.docbook.backslash
2020-03-29 09:25:38 -07:00
manpage-normal.xsl
manpage-normal.xsl: fold in manpage-base.xsl
2020-03-29 09:25:38 -07:00
manpage-quote-apos.xsl
…
manpage.xsl
Documentation: fix build with Asciidoctor 2
2019-09-16 12:20:39 -07:00
merge-options.txt
doc: preparatory clean-up of description on the sign-off option
2020-10-20 11:57:35 -07:00
merge-strategies.txt
merge-strategies: fix typo "reflected to" to "reflected in"
2019-11-11 11:04:46 +09:00
MyFirstContribution.txt
tests: remove support for GIT_TEST_GETTEXT_POISON
2021-01-21 15:50:01 -08:00
MyFirstObjectWalk.txt
MyFirstObjectWalk: drop init_walken_defaults()
2020-11-30 13:55:54 -08:00
object-format-disclaimer.txt
Documentation: mark --object-format=sha256 as experimental
2020-08-17 10:50:14 -07:00
pretty-formats.txt
pretty: document multiple %(describe) being inconsistent
2021-03-01 09:50:27 -08:00
pretty-options.txt
doc: clarify that --abbrev=<n> is about the minimum length
2020-11-04 14:04:44 -08:00
pull-fetch-param.txt
refspec: add support for negative refspecs
2020-09-30 14:52:00 -07:00
ref-reachability-filters.txt
Doc: prefer more specific file name
2020-09-18 15:41:56 -07:00
rev-list-description.txt
git-log.txt: include rev-list-description.txt
2020-07-08 22:08:54 -07:00
rev-list-options.txt
Merge branch 'ma/doc-markup-fix'
2021-02-25 16:43:30 -08:00
revisions.txt
revisions.txt: describe 'rev1 rev2 ...' meaning for ranges
2020-07-08 22:08:53 -07:00
sequencer.txt
cherry-pick/revert: add --skip option
2019-07-02 12:08:08 -07:00
signoff-option.txt
Documentation: stylistically normalize references to Signed-off-by:
2020-10-20 11:57:40 -07:00
SubmittingPatches
SubmittingPatches: tighten wording on "sign-off" procedure
2021-01-07 15:41:36 -08:00
texi.xsl
…
trace2-target-values.txt
docs: mention trace2 target-dir mode in git-config
2019-10-04 09:26:42 +09:00
transfer-data-leaks.txt
…
urls-remotes.txt
…
urls.txt
Doc: Bundle file usage
2019-10-21 12:02:39 +09:00
user-manual.conf
user-manual.conf: don't specify [listingblock]
2020-03-31 16:08:02 -07:00
user-manual.txt
docs: adjust for the recent rename of pu to seen
2020-06-25 09:18:53 -07:00