From aee9c7d6540fe6f66fbbe7be420caa26ae0fa2d9 Mon Sep 17 00:00:00 2001 From: Jens Lehmann Date: Fri, 6 Aug 2010 00:39:25 +0200 Subject: [PATCH] Submodules: Add the new "ignore" config option for diff and status The new "ignore" config option controls the default behavior for "git status" and the diff family. It specifies under what circumstances they consider submodules as modified and can be set separately for each submodule. The command line option "--ignore-submodules=" has been extended to accept the new parameter "none" for both status and diff. Users that chose submodules to get rid of long work tree scanning times might want to set the "dirty" option for those submodules. This brings back the pre 1.7.0 behavior, where submodule work trees were never scanned for modifications. By using "--ignore-submodules=none" on the command line the status and diff commands can be told to do a full scan. This option can be set to the following values (which have the same name and meaning as for the "--ignore-submodules" option of status and diff): "all": All changes to the submodule will be ignored. "dirty": Only differences of the commit recorded in the superproject and the submodules HEAD will be considered modifications, all changes to the work tree of the submodule will be ignored. When using this value, the submodule will not be scanned for work tree changes at all, leading to a performance benefit on large submodules. "untracked": Only untracked files in the submodules work tree are ignored, a changed HEAD and/or modified files in the submodule will mark it as modified. "none" (which is the default): Either untracked or modified files in a submodules work tree or a difference between the subdmodules HEAD and the commit recorded in the superproject will make it show up as changed. This value is added as a new parameter for the "--ignore-submodules" option of the diff family and "git status" so the user can override the settings in the configuration. Signed-off-by: Jens Lehmann Signed-off-by: Junio C Hamano --- Documentation/config.txt | 10 +++++ Documentation/diff-options.txt | 6 ++- Documentation/git-status.txt | 6 ++- diff-lib.c | 15 ++++--- diff.c | 35 ++++++++++++--- diff.h | 1 + submodule.c | 57 ++++++++++++++++++++++- submodule.h | 3 ++ t/t4027-diff-submodule.sh | 76 +++++++++++++++++++++++++++++++ t/t7508-status.sh | 100 +++++++++++++++++++++++++++++++++++++++-- wt-status.c | 8 +++- 11 files changed, 297 insertions(+), 20 deletions(-) diff --git a/Documentation/config.txt b/Documentation/config.txt index e75434b3ef..5ca09aed90 100644 --- a/Documentation/config.txt +++ b/Documentation/config.txt @@ -1743,6 +1743,16 @@ submodule..update:: URL and other values found in the `.gitmodules` file. See linkgit:git-submodule[1] and linkgit:gitmodules[5] for details. +submodule..ignore:: + Defines under what circumstances "git status" and the diff family show + a submodule as modified. When set to "all", it will never be considered + modified, "dirty" will ignore all changes to the submodules work tree and + takes only differences between the HEAD of the submodule and the commit + recorded in the superproject into account. "untracked" will additionally + let submodules with modified tracked files in their work tree show up. + Using "none" (the default when this option is not set) also shows + submodules that have untracked files in their work tree as changed. + tar.umask:: This variable can be used to restrict the permission bits of tar archive entries. The default is 0002, which turns off the diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt index 2371262b10..9cf7506626 100644 --- a/Documentation/diff-options.txt +++ b/Documentation/diff-options.txt @@ -330,7 +330,11 @@ endif::git-format-patch[] --ignore-submodules[=]:: Ignore changes to submodules in the diff generation. can be - either "untracked", "dirty" or "all", which is the default. When + either "none", "untracked", "dirty" or "all", which is the default + Using "none" will consider the submodule modified when it either contains + untracked or modified files or its HEAD differs from the commit recorded + in the superproject and can be used to override any settings of the + 'ignore' option in linkgit:git-config[1]. When "untracked" is used submodules are not considered dirty when they only contain untracked content (but they are still scanned for modified content). Using "dirty" ignores all changes to the work tree of submodules, diff --git a/Documentation/git-status.txt b/Documentation/git-status.txt index 2fd054c104..a7a5d79416 100644 --- a/Documentation/git-status.txt +++ b/Documentation/git-status.txt @@ -55,7 +55,11 @@ specified. --ignore-submodules[=]:: Ignore changes to submodules when looking for changes. can be - either "untracked", "dirty" or "all", which is the default. When + either "none", "untracked", "dirty" or "all", which is the default. + Using "none" will consider the submodule modified when it either contains + untracked or modified files or its HEAD differs from the commit recorded + in the superproject and can be used to override any settings of the + 'ignore' option in linkgit:git-config[1]. When "untracked" is used submodules are not considered dirty when they only contain untracked content (but they are still scanned for modified content). Using "dirty" ignores all changes to the work tree of submodules, diff --git a/diff-lib.c b/diff-lib.c index 8b8978ae6d..392ce2bef0 100644 --- a/diff-lib.c +++ b/diff-lib.c @@ -68,11 +68,16 @@ static int match_stat_with_submodule(struct diff_options *diffopt, unsigned ce_option, unsigned *dirty_submodule) { int changed = ce_match_stat(ce, st, ce_option); - if (S_ISGITLINK(ce->ce_mode) - && !DIFF_OPT_TST(diffopt, IGNORE_SUBMODULES) - && !DIFF_OPT_TST(diffopt, IGNORE_DIRTY_SUBMODULES) - && (!changed || DIFF_OPT_TST(diffopt, DIRTY_SUBMODULES))) { - *dirty_submodule = is_submodule_modified(ce->name, DIFF_OPT_TST(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES)); + if (S_ISGITLINK(ce->ce_mode)) { + unsigned orig_flags = diffopt->flags; + if (!DIFF_OPT_TST(diffopt, OVERRIDE_SUBMODULE_CONFIG)) + set_diffopt_flags_from_submodule_config(diffopt, ce->name); + if (DIFF_OPT_TST(diffopt, IGNORE_SUBMODULES)) + changed = 0; + else if (!DIFF_OPT_TST(diffopt, IGNORE_DIRTY_SUBMODULES) + && (!changed || DIFF_OPT_TST(diffopt, DIRTY_SUBMODULES))) + *dirty_submodule = is_submodule_modified(ce->name, DIFF_OPT_TST(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES)); + diffopt->flags = orig_flags; } return changed; } diff --git a/diff.c b/diff.c index 17873f3d9e..8206047314 100644 --- a/diff.c +++ b/diff.c @@ -141,6 +141,9 @@ int git_diff_basic_config(const char *var, const char *value, void *cb) return 0; } + if (!prefixcmp(var, "submodule.")) + return parse_submodule_config_option(var, value); + return git_color_default_config(var, value, cb); } @@ -3166,11 +3169,13 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac) DIFF_OPT_SET(options, ALLOW_TEXTCONV); else if (!strcmp(arg, "--no-textconv")) DIFF_OPT_CLR(options, ALLOW_TEXTCONV); - else if (!strcmp(arg, "--ignore-submodules")) + else if (!strcmp(arg, "--ignore-submodules")) { + DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); handle_ignore_submodules_arg(options, "all"); - else if (!prefixcmp(arg, "--ignore-submodules=")) + } else if (!prefixcmp(arg, "--ignore-submodules=")) { + DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); handle_ignore_submodules_arg(options, arg + 20); - else if (!strcmp(arg, "--submodule")) + } else if (!strcmp(arg, "--submodule")) DIFF_OPT_SET(options, SUBMODULE_LOG); else if (!prefixcmp(arg, "--submodule=")) { if (!strcmp(arg + 12, "log")) @@ -4103,6 +4108,24 @@ int diff_result_code(struct diff_options *opt, int status) return result; } +/* + * Shall changes to this submodule be ignored? + * + * Submodule changes can be configured to be ignored separately for each path, + * but that configuration can be overridden from the command line. + */ +static int is_submodule_ignored(const char *path, struct diff_options *options) +{ + int ignored = 0; + unsigned orig_flags = options->flags; + if (!DIFF_OPT_TST(options, OVERRIDE_SUBMODULE_CONFIG)) + set_diffopt_flags_from_submodule_config(options, path); + if (DIFF_OPT_TST(options, IGNORE_SUBMODULES)) + ignored = 1; + options->flags = orig_flags; + return ignored; +} + void diff_addremove(struct diff_options *options, int addremove, unsigned mode, const unsigned char *sha1, @@ -4110,7 +4133,7 @@ void diff_addremove(struct diff_options *options, { struct diff_filespec *one, *two; - if (DIFF_OPT_TST(options, IGNORE_SUBMODULES) && S_ISGITLINK(mode)) + if (S_ISGITLINK(mode) && is_submodule_ignored(concatpath, options)) return; /* This may look odd, but it is a preparation for @@ -4157,8 +4180,8 @@ void diff_change(struct diff_options *options, { struct diff_filespec *one, *two; - if (DIFF_OPT_TST(options, IGNORE_SUBMODULES) && S_ISGITLINK(old_mode) - && S_ISGITLINK(new_mode)) + if (S_ISGITLINK(old_mode) && S_ISGITLINK(new_mode) && + is_submodule_ignored(concatpath, options)) return; if (DIFF_OPT_TST(options, REVERSE_DIFF)) { diff --git a/diff.h b/diff.h index 063d10ac22..53ad345469 100644 --- a/diff.h +++ b/diff.h @@ -77,6 +77,7 @@ typedef struct strbuf *(*diff_prefix_fn_t)(struct diff_options *opt, void *data) #define DIFF_OPT_DIRTY_SUBMODULES (1 << 24) #define DIFF_OPT_IGNORE_UNTRACKED_IN_SUBMODULES (1 << 25) #define DIFF_OPT_IGNORE_DIRTY_SUBMODULES (1 << 26) +#define DIFF_OPT_OVERRIDE_SUBMODULE_CONFIG (1 << 27) #define DIFF_OPT_TST(opts, flag) ((opts)->flags & DIFF_OPT_##flag) #define DIFF_OPT_SET(opts, flag) ((opts)->flags |= DIFF_OPT_##flag) diff --git a/submodule.c b/submodule.c index 61cb6e21dd..ff2863074b 100644 --- a/submodule.c +++ b/submodule.c @@ -6,6 +6,10 @@ #include "revision.h" #include "run-command.h" #include "diffcore.h" +#include "string-list.h" + +struct string_list config_name_for_path; +struct string_list config_ignore_for_name; static int add_submodule_odb(const char *path) { @@ -46,6 +50,57 @@ done: return ret; } +void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt, + const char *path) +{ + struct string_list_item *path_option, *ignore_option; + path_option = unsorted_string_list_lookup(&config_name_for_path, path); + if (path_option) { + ignore_option = unsorted_string_list_lookup(&config_ignore_for_name, path_option->util); + if (ignore_option) + handle_ignore_submodules_arg(diffopt, ignore_option->util); + } +} + +int parse_submodule_config_option(const char *var, const char *value) +{ + int len; + struct string_list_item *config; + struct strbuf submodname = STRBUF_INIT; + + var += 10; /* Skip "submodule." */ + + len = strlen(var); + if ((len > 5) && !strcmp(var + len - 5, ".path")) { + strbuf_add(&submodname, var, len - 5); + config = unsorted_string_list_lookup(&config_name_for_path, value); + if (config) + free(config->util); + else + config = string_list_append(&config_name_for_path, xstrdup(value)); + config->util = strbuf_detach(&submodname, NULL); + strbuf_release(&submodname); + } else if ((len > 7) && !strcmp(var + len - 7, ".ignore")) { + if (strcmp(value, "untracked") && strcmp(value, "dirty") && + strcmp(value, "all") && strcmp(value, "none")) { + warning("Invalid parameter \"%s\" for config option \"submodule.%s.ignore\"", value, var); + return 0; + } + + strbuf_add(&submodname, var, len - 7); + config = unsorted_string_list_lookup(&config_ignore_for_name, submodname.buf); + if (config) + free(config->util); + else + config = string_list_append(&config_ignore_for_name, + strbuf_detach(&submodname, NULL)); + strbuf_release(&submodname); + config->util = xstrdup(value); + return 0; + } + return 0; +} + void handle_ignore_submodules_arg(struct diff_options *diffopt, const char *arg) { @@ -55,7 +110,7 @@ void handle_ignore_submodules_arg(struct diff_options *diffopt, DIFF_OPT_SET(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES); else if (!strcmp(arg, "dirty")) DIFF_OPT_SET(diffopt, IGNORE_DIRTY_SUBMODULES); - else + else if (strcmp(arg, "none")) die("bad --ignore-submodules argument: %s", arg); } diff --git a/submodule.h b/submodule.h index 6fd3bb4070..185a5ce6c6 100644 --- a/submodule.h +++ b/submodule.h @@ -3,6 +3,9 @@ struct diff_options; +void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt, + const char *path); +int parse_submodule_config_option(const char *var, const char *value); void handle_ignore_submodules_arg(struct diff_options *diffopt, const char *); void show_submodule_summary(FILE *f, const char *path, unsigned char one[20], unsigned char two[20], diff --git a/t/t4027-diff-submodule.sh b/t/t4027-diff-submodule.sh index 1bd8e5ee3a..6836728517 100755 --- a/t/t4027-diff-submodule.sh +++ b/t/t4027-diff-submodule.sh @@ -114,6 +114,31 @@ test_expect_success 'git diff HEAD with dirty submodule (work tree, refs match)' ! test -s actual4 ' +test_expect_success 'git diff HEAD with dirty submodule (work tree, refs match) [.git/config]' ' + git config submodule.subname.ignore none && + git config submodule.subname.path sub && + git diff HEAD >actual && + sed -e "1,/^@@/d" actual >actual.body && + expect_from_to >expect.body $subprev $subprev-dirty && + test_cmp expect.body actual.body && + git config submodule.subname.ignore all && + git diff HEAD >actual2 && + ! test -s actual2 && + git config submodule.subname.ignore untracked && + git diff HEAD >actual3 && + sed -e "1,/^@@/d" actual3 >actual3.body && + expect_from_to >expect.body $subprev $subprev-dirty && + test_cmp expect.body actual3.body && + git config submodule.subname.ignore dirty && + git diff HEAD >actual4 && + ! test -s actual4 && + git diff HEAD --ignore-submodules=none >actual && + sed -e "1,/^@@/d" actual >actual.body && + expect_from_to >expect.body $subprev $subprev-dirty && + test_cmp expect.body actual.body && + git config --remove-section submodule.subname +' + test_expect_success 'git diff HEAD with dirty submodule (index, refs match)' ' ( cd sub && @@ -146,6 +171,57 @@ test_expect_success 'git diff HEAD with dirty submodule (untracked, refs match)' ! test -s actual4 ' +test_expect_success 'git diff HEAD with dirty submodule (untracked, refs match) [.git/config]' ' + git config submodule.subname.ignore all && + git config submodule.subname.path sub && + git diff HEAD >actual2 && + ! test -s actual2 && + git config submodule.subname.ignore untracked && + git diff HEAD >actual3 && + ! test -s actual3 && + git config submodule.subname.ignore dirty && + git diff HEAD >actual4 && + ! test -s actual4 && + git diff --ignore-submodules=none HEAD >actual && + sed -e "1,/^@@/d" actual >actual.body && + expect_from_to >expect.body $subprev $subprev-dirty && + test_cmp expect.body actual.body && + git config --remove-section submodule.subname +' + +test_expect_success 'git diff between submodule commits' ' + git diff HEAD^..HEAD >actual && + sed -e "1,/^@@/d" actual >actual.body && + expect_from_to >expect.body $subtip $subprev && + test_cmp expect.body actual.body && + git diff --ignore-submodules=dirty HEAD^..HEAD >actual && + sed -e "1,/^@@/d" actual >actual.body && + expect_from_to >expect.body $subtip $subprev && + test_cmp expect.body actual.body && + git diff --ignore-submodules HEAD^..HEAD >actual && + ! test -s actual +' + +test_expect_success 'git diff between submodule commits [.git/config]' ' + git diff HEAD^..HEAD >actual && + sed -e "1,/^@@/d" actual >actual.body && + expect_from_to >expect.body $subtip $subprev && + test_cmp expect.body actual.body && + git config submodule.subname.ignore dirty && + git config submodule.subname.path sub && + git diff HEAD^..HEAD >actual && + sed -e "1,/^@@/d" actual >actual.body && + expect_from_to >expect.body $subtip $subprev && + test_cmp expect.body actual.body && + git config submodule.subname.ignore all && + git diff HEAD^..HEAD >actual && + ! test -s actual && + git diff --ignore-submodules=dirty HEAD^..HEAD >actual && + sed -e "1,/^@@/d" actual >actual.body && + expect_from_to >expect.body $subtip $subprev && + git config --remove-section submodule.subname +' + test_expect_success 'git diff (empty submodule dir)' ' : >empty && rm -rf sub/* sub/.git && diff --git a/t/t7508-status.sh b/t/t7508-status.sh index a72fe3ae64..57bf2ee272 100755 --- a/t/t7508-status.sh +++ b/t/t7508-status.sh @@ -808,24 +808,38 @@ test_expect_success POSIXPERM 'status succeeds in a read-only repository' ' (exit $status) ' +(cd sm && echo > bar && git add bar && git commit -q -m 'Add bar' && cd .. && git add sm) +new_head=$(cd sm && git rev-parse --short=7 --verify HEAD) +touch .gitmodules + cat > expect << EOF # On branch master +# Changes to be committed: +# (use "git reset HEAD ..." to unstage) +# +# modified: sm +# # Changed but not updated: # (use "git add ..." to update what will be committed) # (use "git checkout -- ..." to discard changes in working directory) # # modified: dir1/modified # +# Submodule changes to be committed: +# +# * sm $head...$new_head (1): +# > Add bar +# # Untracked files: # (use "git add ..." to include in what will be committed) # +# .gitmodules # dir1/untracked # dir2/modified # dir2/untracked # expect # output # untracked -no changes added to commit (use "git add" and/or "git commit -a") EOF test_expect_success '--ignore-submodules=untracked suppresses submodules with untracked content' ' @@ -834,19 +848,48 @@ test_expect_success '--ignore-submodules=untracked suppresses submodules with un test_cmp expect output ' +test_expect_success '.git/config ignore=untracked suppresses submodules with untracked content' ' + git config --add submodule.subname.ignore untracked && + git config --add submodule.subname.path sm && + git status > output && + test_cmp expect output && + git config --remove-section submodule.subname +' + test_expect_success '--ignore-submodules=dirty suppresses submodules with untracked content' ' git status --ignore-submodules=dirty > output && test_cmp expect output ' +test_expect_success '.git/config ignore=dirty suppresses submodules with untracked content' ' + git config --add submodule.subname.ignore dirty && + git config --add submodule.subname.path sm && + git status > output && + test_cmp expect output && + git config --remove-section submodule.subname +' + test_expect_success '--ignore-submodules=dirty suppresses submodules with modified content' ' echo modified > sm/foo && git status --ignore-submodules=dirty > output && test_cmp expect output ' +test_expect_success '.git/config ignore=dirty suppresses submodules with modified content' ' + git config --add submodule.subname.ignore dirty && + git config --add submodule.subname.path sm && + git status > output && + test_cmp expect output && + git config --remove-section submodule.subname +' + cat > expect << EOF # On branch master +# Changes to be committed: +# (use "git reset HEAD ..." to unstage) +# +# modified: sm +# # Changed but not updated: # (use "git add ..." to update what will be committed) # (use "git checkout -- ..." to discard changes in working directory) @@ -855,16 +898,21 @@ cat > expect << EOF # modified: dir1/modified # modified: sm (modified content) # +# Submodule changes to be committed: +# +# * sm $head...$new_head (1): +# > Add bar +# # Untracked files: # (use "git add ..." to include in what will be committed) # +# .gitmodules # dir1/untracked # dir2/modified # dir2/untracked # expect # output # untracked -no changes added to commit (use "git add" and/or "git commit -a") EOF test_expect_success "--ignore-submodules=untracked doesn't suppress submodules with modified content" ' @@ -872,10 +920,23 @@ test_expect_success "--ignore-submodules=untracked doesn't suppress submodules w test_cmp expect output ' +test_expect_success ".git/config ignore=untracked doesn't suppress submodules with modified content" ' + git config --add submodule.subname.ignore untracked && + git config --add submodule.subname.path sm && + git status > output && + test_cmp expect output && + git config --remove-section submodule.subname +' + head2=$(cd sm && git commit -q -m "2nd commit" foo && git rev-parse --short=7 --verify HEAD) cat > expect << EOF # On branch master +# Changes to be committed: +# (use "git reset HEAD ..." to unstage) +# +# modified: sm +# # Changed but not updated: # (use "git add ..." to update what will be committed) # (use "git checkout -- ..." to discard changes in working directory) @@ -883,21 +944,26 @@ cat > expect << EOF # modified: dir1/modified # modified: sm (new commits) # +# Submodule changes to be committed: +# +# * sm $head...$new_head (1): +# > Add bar +# # Submodules changed but not updated: # -# * sm $head...$head2 (1): +# * sm $new_head...$head2 (1): # > 2nd commit # # Untracked files: # (use "git add ..." to include in what will be committed) # +# .gitmodules # dir1/untracked # dir2/modified # dir2/untracked # expect # output # untracked -no changes added to commit (use "git add" and/or "git commit -a") EOF test_expect_success "--ignore-submodules=untracked doesn't suppress submodule summary" ' @@ -905,11 +971,28 @@ test_expect_success "--ignore-submodules=untracked doesn't suppress submodule su test_cmp expect output ' +test_expect_success ".git/config ignore=untracked doesn't suppress submodule summary" ' + git config --add submodule.subname.ignore untracked && + git config --add submodule.subname.path sm && + git status > output && + test_cmp expect output && + git config --remove-section submodule.subname +' + test_expect_success "--ignore-submodules=dirty doesn't suppress submodule summary" ' git status --ignore-submodules=dirty > output && test_cmp expect output ' +test_expect_success ".git/config ignore=dirty doesn't suppress submodule summary" ' + git config --add submodule.subname.ignore dirty && + git config --add submodule.subname.path sm && + git status > output && + test_cmp expect output && + git config --remove-section submodule.subname +' + + cat > expect << EOF # On branch master # Changed but not updated: @@ -921,6 +1004,7 @@ cat > expect << EOF # Untracked files: # (use "git add ..." to include in what will be committed) # +# .gitmodules # dir1/untracked # dir2/modified # dir2/untracked @@ -935,4 +1019,12 @@ test_expect_success "--ignore-submodules=all suppresses submodule summary" ' test_cmp expect output ' +test_expect_failure '.git/config ignore=all suppresses submodule summary' ' + git config --add submodule.subname.ignore all && + git config --add submodule.subname.path sm && + git status > output && + test_cmp expect output && + git config --remove-section submodule.subname +' + test_done diff --git a/wt-status.c b/wt-status.c index 2f9e33c8fa..54b6b03b9c 100644 --- a/wt-status.c +++ b/wt-status.c @@ -313,8 +313,10 @@ static void wt_status_collect_changes_worktree(struct wt_status *s) DIFF_OPT_SET(&rev.diffopt, DIRTY_SUBMODULES); if (!s->show_untracked_files) DIFF_OPT_SET(&rev.diffopt, IGNORE_UNTRACKED_IN_SUBMODULES); - if (s->ignore_submodule_arg) + if (s->ignore_submodule_arg) { + DIFF_OPT_SET(&rev.diffopt, OVERRIDE_SUBMODULE_CONFIG); handle_ignore_submodules_arg(&rev.diffopt, s->ignore_submodule_arg); + } rev.diffopt.format_callback = wt_status_collect_changed_cb; rev.diffopt.format_callback_data = s; rev.prune_data = s->pathspec; @@ -331,8 +333,10 @@ static void wt_status_collect_changes_index(struct wt_status *s) opt.def = s->is_initial ? EMPTY_TREE_SHA1_HEX : s->reference; setup_revisions(0, NULL, &rev, &opt); - if (s->ignore_submodule_arg) + if (s->ignore_submodule_arg) { + DIFF_OPT_SET(&rev.diffopt, OVERRIDE_SUBMODULE_CONFIG); handle_ignore_submodules_arg(&rev.diffopt, s->ignore_submodule_arg); + } rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK; rev.diffopt.format_callback = wt_status_collect_updated_cb; -- 2.11.4.GIT