diff options
Diffstat (limited to 'contrib')
| -rw-r--r-- | contrib/coccinelle/free.cocci | 6 | ||||
| -rw-r--r-- | contrib/coccinelle/swap.cocci | 28 | ||||
| -rw-r--r-- | contrib/coccinelle/xstrdup_or_null.cocci | 6 | ||||
| -rw-r--r-- | contrib/completion/git-completion.bash | 148 | ||||
| -rw-r--r-- | contrib/convert-objects/convert-objects.c | 329 | ||||
| -rw-r--r-- | contrib/convert-objects/git-convert-objects.txt | 29 | ||||
| -rwxr-xr-x | contrib/examples/git-difftool.perl | 481 |
7 files changed, 644 insertions, 383 deletions
diff --git a/contrib/coccinelle/free.cocci b/contrib/coccinelle/free.cocci index e28213161a..c03ba737e5 100644 --- a/contrib/coccinelle/free.cocci +++ b/contrib/coccinelle/free.cocci @@ -3,3 +3,9 @@ expression E; @@ - if (E) free(E); + +@@ +expression E; +@@ +- if (!E) + free(E); diff --git a/contrib/coccinelle/swap.cocci b/contrib/coccinelle/swap.cocci new file mode 100644 index 0000000000..a0934d1fda --- /dev/null +++ b/contrib/coccinelle/swap.cocci @@ -0,0 +1,28 @@ +@ swap_with_declaration @ +type T; +identifier tmp; +T a, b; +@@ +- T tmp = a; ++ T tmp; ++ tmp = a; + a = b; + b = tmp; + +@ swap @ +type T; +T tmp, a, b; +@@ +- tmp = a; +- a = b; +- b = tmp; ++ SWAP(a, b); + +@ extends swap @ +identifier unused; +@@ + { + ... +- T unused; + ... when != unused + } diff --git a/contrib/coccinelle/xstrdup_or_null.cocci b/contrib/coccinelle/xstrdup_or_null.cocci index 3fceef132b..8e05d1ca4b 100644 --- a/contrib/coccinelle/xstrdup_or_null.cocci +++ b/contrib/coccinelle/xstrdup_or_null.cocci @@ -5,3 +5,9 @@ expression V; - if (E) - V = xstrdup(E); + V = xstrdup_or_null(E); + +@@ +expression E; +@@ +- xstrdup(absolute_path(E)) ++ absolute_pathdup(E) diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash index 6721ff80fb..a16f33b895 100644 --- a/contrib/completion/git-completion.bash +++ b/contrib/completion/git-completion.bash @@ -936,6 +936,7 @@ _git_apply () --apply --no-add --exclude= --ignore-whitespace --ignore-space-change --whitespace= --inaccurate-eof --verbose + --recount --directory= " return esac @@ -947,13 +948,17 @@ _git_add () --*) __gitcomp " --interactive --refresh --patch --update --dry-run - --ignore-errors --intent-to-add + --ignore-errors --intent-to-add --force --edit --chmod= " return esac - # XXX should we check for --update and --all options ? - __git_complete_index_file "--others --modified --directory --no-empty-directory" + local complete_opt="--others --modified --directory --no-empty-directory" + if test -n "$(__git_find_on_cmdline "-u --update")" + then + complete_opt="--modified" + fi + __git_complete_index_file "$complete_opt" } _git_archive () @@ -970,7 +975,7 @@ _git_archive () --*) __gitcomp " --format= --list --verbose - --prefix= --remote= --exec= + --prefix= --remote= --exec= --output " return ;; @@ -1025,6 +1030,7 @@ _git_branch () --track --no-track --contains --merged --no-merged --set-upstream-to= --edit-description --list --unset-upstream --delete --move --remotes + --column --no-column --sort= --points-at " ;; *) @@ -1138,6 +1144,8 @@ _git_clone () --single-branch --branch --recurse-submodules + --no-single-branch + --shallow-submodules " return ;; @@ -1179,6 +1187,7 @@ _git_commit () --reset-author --file= --message= --template= --cleanup= --untracked-files --untracked-files= --verbose --quiet --fixup= --squash= + --patch --short --date --allow-empty " return esac @@ -1197,7 +1206,8 @@ _git_describe () --*) __gitcomp " --all --tags --contains --abbrev= --candidates= - --exact-match --debug --long --match --always + --exact-match --debug --long --match --always --first-parent + --exclude " return esac @@ -1206,7 +1216,7 @@ _git_describe () __git_diff_algorithms="myers minimal patience histogram" -__git_diff_submodule_formats="log short" +__git_diff_submodule_formats="diff log short" __git_diff_common_options="--stat --numstat --shortstat --summary --patch-with-stat --name-only --name-status --color @@ -1280,6 +1290,7 @@ __git_fetch_recurse_submodules="yes on-demand no" __git_fetch_options=" --quiet --verbose --append --upload-pack --force --keep --depth= --tags --no-tags --all --prune --dry-run --recurse-submodules= + --unshallow --update-shallow " _git_fetch () @@ -1329,7 +1340,7 @@ _git_fsck () --*) __gitcomp " --tags --root --unreachable --cache --no-reflogs --full - --strict --verbose --lost-found + --strict --verbose --lost-found --name-objects " return ;; @@ -1373,6 +1384,8 @@ _git_grep () --max-depth --count --and --or --not --all-match + --break --heading --show-function --function-context + --untracked --no-index " return ;; @@ -1445,6 +1458,12 @@ _git_ls_files () _git_ls_remote () { + case "$cur" in + --*) + __gitcomp "--heads --tags --refs --get-url --symref" + return + ;; + esac __gitcomp_nl "$(__git_remotes)" } @@ -1566,7 +1585,7 @@ _git_mergetool () return ;; --*) - __gitcomp "--tool=" + __gitcomp "--tool= --prompt --no-prompt" return ;; esac @@ -1674,7 +1693,7 @@ _git_pull () __git_complete_remote_or_refspec } -__git_push_recurse_submodules="check on-demand" +__git_push_recurse_submodules="check on-demand only" __git_complete_force_with_lease () { @@ -2374,40 +2393,88 @@ _git_config () _git_remote () { - local subcommands="add rename remove set-head set-branches set-url show prune update" + local subcommands=" + add rename remove set-head set-branches + get-url set-url show prune update + " local subcommand="$(__git_find_on_cmdline "$subcommands")" if [ -z "$subcommand" ]; then - __gitcomp "$subcommands" + case "$cur" in + --*) + __gitcomp "--verbose" + ;; + *) + __gitcomp "$subcommands" + ;; + esac return fi - case "$subcommand" in - rename|remove|set-url|show|prune) - __gitcomp_nl "$(__git_remotes)" + case "$subcommand,$cur" in + add,--*) + __gitcomp "--track --master --fetch --tags --no-tags --mirror=" + ;; + add,*) + ;; + set-head,--*) + __gitcomp "--auto --delete" + ;; + set-branches,--*) + __gitcomp "--add" ;; - set-head|set-branches) + set-head,*|set-branches,*) __git_complete_remote_or_refspec ;; - update) + update,--*) + __gitcomp "--prune" + ;; + update,*) __gitcomp "$(__git_get_config_variables "remotes")" ;; + set-url,--*) + __gitcomp "--push --add --delete" + ;; + get-url,--*) + __gitcomp "--push --all" + ;; + prune,--*) + __gitcomp "--dry-run" + ;; *) + __gitcomp_nl "$(__git_remotes)" ;; esac } _git_replace () { + case "$cur" in + --*) + __gitcomp "--edit --graft --format= --list --delete" + return + ;; + esac __gitcomp_nl "$(__git_refs)" } +_git_rerere () +{ + local subcommands="clear forget diff remaining status gc" + local subcommand="$(__git_find_on_cmdline "$subcommands")" + if test -z "$subcommand" + then + __gitcomp "$subcommands" + return + fi +} + _git_reset () { __git_has_doubledash && return case "$cur" in --*) - __gitcomp "--merge --mixed --hard --soft --patch" + __gitcomp "--merge --mixed --hard --soft --patch --keep" return ;; esac @@ -2423,7 +2490,10 @@ _git_revert () fi case "$cur" in --*) - __gitcomp "--edit --mainline --no-edit --no-commit --signoff" + __gitcomp " + --edit --mainline --no-edit --no-commit --signoff + --strategy= --strategy-option= + " return ;; esac @@ -2451,7 +2521,7 @@ _git_shortlog () __gitcomp " $__git_log_common_options $__git_log_shortlog_options - --numbered --summary + --numbered --summary --email " return ;; @@ -2556,10 +2626,11 @@ _git_submodule () __git_has_doubledash && return local subcommands="add status init deinit update summary foreach sync" - if [ -z "$(__git_find_on_cmdline "$subcommands")" ]; then + local subcommand="$(__git_find_on_cmdline "$subcommands")" + if [ -z "$subcommand" ]; then case "$cur" in --*) - __gitcomp "--quiet --cached" + __gitcomp "--quiet" ;; *) __gitcomp "$subcommands" @@ -2567,6 +2638,33 @@ _git_submodule () esac return fi + + case "$subcommand,$cur" in + add,--*) + __gitcomp "--branch --force --name --reference --depth" + ;; + status,--*) + __gitcomp "--cached --recursive" + ;; + deinit,--*) + __gitcomp "--force --all" + ;; + update,--*) + __gitcomp " + --init --remote --no-fetch + --recommend-shallow --no-recommend-shallow + --force --rebase --merge --reference --depth --recursive --jobs + " + ;; + summary,--*) + __gitcomp "--cached --files --summary-limit" + ;; + foreach,--*|sync,--*) + __gitcomp "--recursive" + ;; + *) + ;; + esac } _git_svn () @@ -2587,14 +2685,14 @@ _git_svn () --no-metadata --use-svm-props --use-svnsync-props --log-window-size= --no-checkout --quiet --repack-flags --use-log-author --localtime + --add-author-from --ignore-paths= --include-paths= $remote_opts " local init_opts=" --template= --shared= --trunk= --tags= --branches= --stdlayout --minimize-url --no-metadata --use-svm-props --use-svnsync-props - --rewrite-root= --prefix= --use-log-author - --add-author-from $remote_opts + --rewrite-root= --prefix= $remote_opts " local cmt_opts=" --edit --rmdir --find-copies-harder --copy-similarity= @@ -2701,8 +2799,8 @@ _git_tag () --*) __gitcomp " --list --delete --verify --annotate --message --file - --sign --cleanup --local-user --force --column --sort - --contains --points-at + --sign --cleanup --local-user --force --column --sort= + --contains --points-at --merged --no-merged --create-reflog " ;; esac diff --git a/contrib/convert-objects/convert-objects.c b/contrib/convert-objects/convert-objects.c deleted file mode 100644 index f3b57bf1d2..0000000000 --- a/contrib/convert-objects/convert-objects.c +++ /dev/null @@ -1,329 +0,0 @@ -#include "cache.h" -#include "blob.h" -#include "commit.h" -#include "tree.h" - -struct entry { - unsigned char old_sha1[20]; - unsigned char new_sha1[20]; - int converted; -}; - -#define MAXOBJECTS (1000000) - -static struct entry *convert[MAXOBJECTS]; -static int nr_convert; - -static struct entry * convert_entry(unsigned char *sha1); - -static struct entry *insert_new(unsigned char *sha1, int pos) -{ - struct entry *new = xcalloc(1, sizeof(struct entry)); - hashcpy(new->old_sha1, sha1); - memmove(convert + pos + 1, convert + pos, (nr_convert - pos) * sizeof(struct entry *)); - convert[pos] = new; - nr_convert++; - if (nr_convert == MAXOBJECTS) - die("you're kidding me - hit maximum object limit"); - return new; -} - -static struct entry *lookup_entry(unsigned char *sha1) -{ - int low = 0, high = nr_convert; - - while (low < high) { - int next = (low + high) / 2; - struct entry *n = convert[next]; - int cmp = hashcmp(sha1, n->old_sha1); - if (!cmp) - return n; - if (cmp < 0) { - high = next; - continue; - } - low = next+1; - } - return insert_new(sha1, low); -} - -static void convert_binary_sha1(void *buffer) -{ - struct entry *entry = convert_entry(buffer); - hashcpy(buffer, entry->new_sha1); -} - -static void convert_ascii_sha1(void *buffer) -{ - unsigned char sha1[20]; - struct entry *entry; - - if (get_sha1_hex(buffer, sha1)) - die("expected sha1, got '%s'", (char *) buffer); - entry = convert_entry(sha1); - memcpy(buffer, sha1_to_hex(entry->new_sha1), 40); -} - -static unsigned int convert_mode(unsigned int mode) -{ - unsigned int newmode; - - newmode = mode & S_IFMT; - if (S_ISREG(mode)) - newmode |= (mode & 0100) ? 0755 : 0644; - return newmode; -} - -static int write_subdirectory(void *buffer, unsigned long size, const char *base, int baselen, unsigned char *result_sha1) -{ - char *new = xmalloc(size); - unsigned long newlen = 0; - unsigned long used; - - used = 0; - while (size) { - int len = 21 + strlen(buffer); - char *path = strchr(buffer, ' '); - unsigned char *sha1; - unsigned int mode; - char *slash, *origpath; - - if (!path || strtoul_ui(buffer, 8, &mode)) - die("bad tree conversion"); - mode = convert_mode(mode); - path++; - if (memcmp(path, base, baselen)) - break; - origpath = path; - path += baselen; - slash = strchr(path, '/'); - if (!slash) { - newlen += sprintf(new + newlen, "%o %s", mode, path); - new[newlen++] = '\0'; - hashcpy((unsigned char *)new + newlen, (unsigned char *) buffer + len - 20); - newlen += 20; - - used += len; - size -= len; - buffer = (char *) buffer + len; - continue; - } - - newlen += sprintf(new + newlen, "%o %.*s", S_IFDIR, (int)(slash - path), path); - new[newlen++] = 0; - sha1 = (unsigned char *)(new + newlen); - newlen += 20; - - len = write_subdirectory(buffer, size, origpath, slash-origpath+1, sha1); - - used += len; - size -= len; - buffer = (char *) buffer + len; - } - - write_sha1_file(new, newlen, tree_type, result_sha1); - free(new); - return used; -} - -static void convert_tree(void *buffer, unsigned long size, unsigned char *result_sha1) -{ - void *orig_buffer = buffer; - unsigned long orig_size = size; - - while (size) { - size_t len = 1+strlen(buffer); - - convert_binary_sha1((char *) buffer + len); - - len += 20; - if (len > size) - die("corrupt tree object"); - size -= len; - buffer = (char *) buffer + len; - } - - write_subdirectory(orig_buffer, orig_size, "", 0, result_sha1); -} - -static unsigned long parse_oldstyle_date(const char *buf) -{ - char c, *p; - char buffer[100]; - struct tm tm; - const char *formats[] = { - "%c", - "%a %b %d %T", - "%Z", - "%Y", - " %Y", - NULL - }; - /* We only ever did two timezones in the bad old format .. */ - const char *timezones[] = { - "PDT", "PST", "CEST", NULL - }; - const char **fmt = formats; - - p = buffer; - while (isspace(c = *buf)) - buf++; - while ((c = *buf++) != '\n') - *p++ = c; - *p++ = 0; - buf = buffer; - memset(&tm, 0, sizeof(tm)); - do { - const char *next = strptime(buf, *fmt, &tm); - if (next) { - if (!*next) - return mktime(&tm); - buf = next; - } else { - const char **p = timezones; - while (isspace(*buf)) - buf++; - while (*p) { - if (!memcmp(buf, *p, strlen(*p))) { - buf += strlen(*p); - break; - } - p++; - } - } - fmt++; - } while (*buf && *fmt); - printf("left: %s\n", buf); - return mktime(&tm); -} - -static int convert_date_line(char *dst, void **buf, unsigned long *sp) -{ - unsigned long size = *sp; - char *line = *buf; - char *next = strchr(line, '\n'); - char *date = strchr(line, '>'); - int len; - - if (!next || !date) - die("missing or bad author/committer line %s", line); - next++; date += 2; - - *buf = next; - *sp = size - (next - line); - - len = date - line; - memcpy(dst, line, len); - dst += len; - - /* Is it already in new format? */ - if (isdigit(*date)) { - int datelen = next - date; - memcpy(dst, date, datelen); - return len + datelen; - } - - /* - * Hacky hacky: one of the sparse old-style commits does not have - * any date at all, but we can fake it by using the committer date. - */ - if (*date == '\n' && strchr(next, '>')) - date = strchr(next, '>')+2; - - return len + sprintf(dst, "%lu -0700\n", parse_oldstyle_date(date)); -} - -static void convert_date(void *buffer, unsigned long size, unsigned char *result_sha1) -{ - char *new = xmalloc(size + 100); - unsigned long newlen = 0; - - /* "tree <sha1>\n" */ - memcpy(new + newlen, buffer, 46); - newlen += 46; - buffer = (char *) buffer + 46; - size -= 46; - - /* "parent <sha1>\n" */ - while (!memcmp(buffer, "parent ", 7)) { - memcpy(new + newlen, buffer, 48); - newlen += 48; - buffer = (char *) buffer + 48; - size -= 48; - } - - /* "author xyz <xyz> date" */ - newlen += convert_date_line(new + newlen, &buffer, &size); - /* "committer xyz <xyz> date" */ - newlen += convert_date_line(new + newlen, &buffer, &size); - - /* Rest */ - memcpy(new + newlen, buffer, size); - newlen += size; - - write_sha1_file(new, newlen, commit_type, result_sha1); - free(new); -} - -static void convert_commit(void *buffer, unsigned long size, unsigned char *result_sha1) -{ - void *orig_buffer = buffer; - unsigned long orig_size = size; - - if (memcmp(buffer, "tree ", 5)) - die("Bad commit '%s'", (char *) buffer); - convert_ascii_sha1((char *) buffer + 5); - buffer = (char *) buffer + 46; /* "tree " + "hex sha1" + "\n" */ - while (!memcmp(buffer, "parent ", 7)) { - convert_ascii_sha1((char *) buffer + 7); - buffer = (char *) buffer + 48; - } - convert_date(orig_buffer, orig_size, result_sha1); -} - -static struct entry * convert_entry(unsigned char *sha1) -{ - struct entry *entry = lookup_entry(sha1); - enum object_type type; - void *buffer, *data; - unsigned long size; - - if (entry->converted) - return entry; - data = read_sha1_file(sha1, &type, &size); - if (!data) - die("unable to read object %s", sha1_to_hex(sha1)); - - buffer = xmalloc(size); - memcpy(buffer, data, size); - - if (type == OBJ_BLOB) { - write_sha1_file(buffer, size, blob_type, entry->new_sha1); - } else if (type == OBJ_TREE) - convert_tree(buffer, size, entry->new_sha1); - else if (type == OBJ_COMMIT) - convert_commit(buffer, size, entry->new_sha1); - else - die("unknown object type %d in %s", type, sha1_to_hex(sha1)); - entry->converted = 1; - free(buffer); - free(data); - return entry; -} - -int main(int argc, char **argv) -{ - unsigned char sha1[20]; - struct entry *entry; - - setup_git_directory(); - - if (argc != 2) - usage("git-convert-objects <sha1>"); - if (get_sha1(argv[1], sha1)) - die("Not a valid object name %s", argv[1]); - - entry = convert_entry(sha1); - printf("new sha1: %s\n", sha1_to_hex(entry->new_sha1)); - return 0; -} diff --git a/contrib/convert-objects/git-convert-objects.txt b/contrib/convert-objects/git-convert-objects.txt deleted file mode 100644 index f871880cfb..0000000000 --- a/contrib/convert-objects/git-convert-objects.txt +++ /dev/null @@ -1,29 +0,0 @@ -git-convert-objects(1) -====================== - -NAME ----- -git-convert-objects - Converts old-style git repository - - -SYNOPSIS --------- -[verse] -'git-convert-objects' - -DESCRIPTION ------------ -Converts old-style git repository to the latest format - - -Author ------- -Written by Linus Torvalds <torvalds@osdl.org> - -Documentation --------------- -Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel.org>. - -GIT ---- -Part of the linkgit:git[7] suite diff --git a/contrib/examples/git-difftool.perl b/contrib/examples/git-difftool.perl new file mode 100755 index 0000000000..df59bdfe97 --- /dev/null +++ b/contrib/examples/git-difftool.perl @@ -0,0 +1,481 @@ +#!/usr/bin/perl +# Copyright (c) 2009, 2010 David Aguilar +# Copyright (c) 2012 Tim Henigan +# +# This is a wrapper around the GIT_EXTERNAL_DIFF-compatible +# git-difftool--helper script. +# +# This script exports GIT_EXTERNAL_DIFF and GIT_PAGER for use by git. +# The GIT_DIFF* variables are exported for use by git-difftool--helper. +# +# Any arguments that are unknown to this script are forwarded to 'git diff'. + +use 5.008; +use strict; +use warnings; +use Error qw(:try); +use File::Basename qw(dirname); +use File::Copy; +use File::Find; +use File::stat; +use File::Path qw(mkpath rmtree); +use File::Temp qw(tempdir); +use Getopt::Long qw(:config pass_through); +use Git; +use Git::I18N; + +sub usage +{ + my $exitcode = shift; + print << 'USAGE'; +usage: git difftool [-t|--tool=<tool>] [--tool-help] + [-x|--extcmd=<cmd>] + [-g|--gui] [--no-gui] + [--prompt] [-y|--no-prompt] + [-d|--dir-diff] + ['git diff' options] +USAGE + exit($exitcode); +} + +sub print_tool_help +{ + # See the comment at the bottom of file_diff() for the reason behind + # using system() followed by exit() instead of exec(). + my $rc = system(qw(git mergetool --tool-help=diff)); + exit($rc | ($rc >> 8)); +} + +sub exit_cleanup +{ + my ($tmpdir, $status) = @_; + my $errno = $!; + rmtree($tmpdir); + if ($status and $errno) { + my ($package, $file, $line) = caller(); + warn "$file line $line: $errno\n"; + } + exit($status | ($status >> 8)); +} + +sub use_wt_file +{ + my ($file, $sha1) = @_; + my $null_sha1 = '0' x 40; + + if (-l $file || ! -e _) { + return (0, $null_sha1); + } + + my $wt_sha1 = Git::command_oneline('hash-object', $file); + my $use = ($sha1 eq $null_sha1) || ($sha1 eq $wt_sha1); + return ($use, $wt_sha1); +} + +sub changed_files +{ + my ($repo_path, $index, $worktree) = @_; + $ENV{GIT_INDEX_FILE} = $index; + + my @gitargs = ('--git-dir', $repo_path, '--work-tree', $worktree); + my @refreshargs = ( + @gitargs, 'update-index', + '--really-refresh', '-q', '--unmerged'); + try { + Git::command_oneline(@refreshargs); + } catch Git::Error::Command with {}; + + my @diffargs = (@gitargs, 'diff-files', '--name-only', '-z'); + my $line = Git::command_oneline(@diffargs); + my @files; + if (defined $line) { + @files = split('\0', $line); + } else { + @files = (); + } + + delete($ENV{GIT_INDEX_FILE}); + + return map { $_ => 1 } @files; +} + +sub setup_dir_diff +{ + my ($worktree, $symlinks) = @_; + my @gitargs = ('diff', '--raw', '--no-abbrev', '-z', @ARGV); + my $diffrtn = Git::command_oneline(@gitargs); + exit(0) unless defined($diffrtn); + + # Go to the root of the worktree now that we've captured the list of + # changed files. The paths returned by diff --raw are relative to the + # top-level of the repository, but we defer changing directories so + # that @ARGV can perform pathspec limiting in the current directory. + chdir($worktree); + + # Build index info for left and right sides of the diff + my $submodule_mode = '160000'; + my $symlink_mode = '120000'; + my $null_mode = '0' x 6; + my $null_sha1 = '0' x 40; + my $lindex = ''; + my $rindex = ''; + my $wtindex = ''; + my %submodule; + my %symlink; + my @files = (); + my %working_tree_dups = (); + my @rawdiff = split('\0', $diffrtn); + + my $i = 0; + while ($i < $#rawdiff) { + if ($rawdiff[$i] =~ /^::/) { + warn __ <<'EOF'; +Combined diff formats ('-c' and '--cc') are not supported in +directory diff mode ('-d' and '--dir-diff'). +EOF + exit(1); + } + + my ($lmode, $rmode, $lsha1, $rsha1, $status) = + split(' ', substr($rawdiff[$i], 1)); + my $src_path = $rawdiff[$i + 1]; + my $dst_path; + + if ($status =~ /^[CR]/) { + $dst_path = $rawdiff[$i + 2]; + $i += 3; + } else { + $dst_path = $src_path; + $i += 2; + } + + if ($lmode eq $submodule_mode or $rmode eq $submodule_mode) { + $submodule{$src_path}{left} = $lsha1; + if ($lsha1 ne $rsha1) { + $submodule{$dst_path}{right} = $rsha1; + } else { + $submodule{$dst_path}{right} = "$rsha1-dirty"; + } + next; + } + + if ($lmode eq $symlink_mode) { + $symlink{$src_path}{left} = + Git::command_oneline('show', $lsha1); + } + + if ($rmode eq $symlink_mode) { + $symlink{$dst_path}{right} = + Git::command_oneline('show', $rsha1); + } + + if ($lmode ne $null_mode and $status !~ /^C/) { + $lindex .= "$lmode $lsha1\t$src_path\0"; + } + + if ($rmode ne $null_mode) { + # Avoid duplicate entries + if ($working_tree_dups{$dst_path}++) { + next; + } + my ($use, $wt_sha1) = + use_wt_file($dst_path, $rsha1); + if ($use) { + push @files, $dst_path; + $wtindex .= "$rmode $wt_sha1\t$dst_path\0"; + } else { + $rindex .= "$rmode $rsha1\t$dst_path\0"; + } + } + } + + # Go to the root of the worktree so that the left index files + # are properly setup -- the index is toplevel-relative. + chdir($worktree); + + # Setup temp directories + my $tmpdir = tempdir('git-difftool.XXXXX', CLEANUP => 0, TMPDIR => 1); + my $ldir = "$tmpdir/left"; + my $rdir = "$tmpdir/right"; + mkpath($ldir) or exit_cleanup($tmpdir, 1); + mkpath($rdir) or exit_cleanup($tmpdir, 1); + + # Populate the left and right directories based on each index file + my ($inpipe, $ctx); + $ENV{GIT_INDEX_FILE} = "$tmpdir/lindex"; + ($inpipe, $ctx) = + Git::command_input_pipe('update-index', '-z', '--index-info'); + print($inpipe $lindex); + Git::command_close_pipe($inpipe, $ctx); + + my $rc = system('git', 'checkout-index', '--all', "--prefix=$ldir/"); + exit_cleanup($tmpdir, $rc) if $rc != 0; + + $ENV{GIT_INDEX_FILE} = "$tmpdir/rindex"; + ($inpipe, $ctx) = + Git::command_input_pipe('update-index', '-z', '--index-info'); + print($inpipe $rindex); + Git::command_close_pipe($inpipe, $ctx); + + $rc = system('git', 'checkout-index', '--all', "--prefix=$rdir/"); + exit_cleanup($tmpdir, $rc) if $rc != 0; + + $ENV{GIT_INDEX_FILE} = "$tmpdir/wtindex"; + ($inpipe, $ctx) = + Git::command_input_pipe('update-index', '--info-only', '-z', '--index-info'); + print($inpipe $wtindex); + Git::command_close_pipe($inpipe, $ctx); + + # If $GIT_DIR was explicitly set just for the update/checkout + # commands, then it should be unset before continuing. + delete($ENV{GIT_INDEX_FILE}); + + # Changes in the working tree need special treatment since they are + # not part of the index. + for my $file (@files) { + my $dir = dirname($file); + unless (-d "$rdir/$dir") { + mkpath("$rdir/$dir") or + exit_cleanup($tmpdir, 1); + } + if ($symlinks) { + symlink("$worktree/$file", "$rdir/$file") or + exit_cleanup($tmpdir, 1); + } else { + copy($file, "$rdir/$file") or + exit_cleanup($tmpdir, 1); + + my $mode = stat($file)->mode; + chmod($mode, "$rdir/$file") or + exit_cleanup($tmpdir, 1); + } + } + + # Changes to submodules require special treatment. This loop writes a + # temporary file to both the left and right directories to show the + # change in the recorded SHA1 for the submodule. + for my $path (keys %submodule) { + my $ok = 0; + if (defined($submodule{$path}{left})) { + $ok = write_to_file("$ldir/$path", + "Subproject commit $submodule{$path}{left}"); + } + if (defined($submodule{$path}{right})) { + $ok = write_to_file("$rdir/$path", + "Subproject commit $submodule{$path}{right}"); + } + exit_cleanup($tmpdir, 1) if not $ok; + } + + # Symbolic links require special treatment. The standard "git diff" + # shows only the link itself, not the contents of the link target. + # This loop replicates that behavior. + for my $path (keys %symlink) { + my $ok = 0; + if (defined($symlink{$path}{left})) { + $ok = write_to_file("$ldir/$path", + $symlink{$path}{left}); + } + if (defined($symlink{$path}{right})) { + $ok = write_to_file("$rdir/$path", + $symlink{$path}{right}); + } + exit_cleanup($tmpdir, 1) if not $ok; + } + + return ($ldir, $rdir, $tmpdir, @files); +} + +sub write_to_file +{ + my $path = shift; + my $value = shift; + + # Make sure the path to the file exists + my $dir = dirname($path); + unless (-d "$dir") { + mkpath("$dir") or return 0; + } + + # If the file already exists in that location, delete it. This + # is required in the case of symbolic links. + unlink($path); + + open(my $fh, '>', $path) or return 0; + print($fh $value); + close($fh); + + return 1; +} + +sub main +{ + # parse command-line options. all unrecognized options and arguments + # are passed through to the 'git diff' command. + my %opts = ( + difftool_cmd => undef, + dirdiff => undef, + extcmd => undef, + gui => undef, + help => undef, + prompt => undef, + symlinks => $^O ne 'cygwin' && + $^O ne 'MSWin32' && $^O ne 'msys', + tool_help => undef, + trust_exit_code => undef, + ); + GetOptions('g|gui!' => \$opts{gui}, + 'd|dir-diff' => \$opts{dirdiff}, + 'h' => \$opts{help}, + 'prompt!' => \$opts{prompt}, + 'y' => sub { $opts{prompt} = 0; }, + 'symlinks' => \$opts{symlinks}, + 'no-symlinks' => sub { $opts{symlinks} = 0; }, + 't|tool:s' => \$opts{difftool_cmd}, + 'tool-help' => \$opts{tool_help}, + 'trust-exit-code' => \$opts{trust_exit_code}, + 'no-trust-exit-code' => sub { $opts{trust_exit_code} = 0; }, + 'x|extcmd:s' => \$opts{extcmd}); + + if (defined($opts{help})) { + usage(0); + } + if (defined($opts{tool_help})) { + print_tool_help(); + } + if (defined($opts{difftool_cmd})) { + if (length($opts{difftool_cmd}) > 0) { + $ENV{GIT_DIFF_TOOL} = $opts{difftool_cmd}; + } else { + print __("No <tool> given for --tool=<tool>\n"); + usage(1); + } + } + if (defined($opts{extcmd})) { + if (length($opts{extcmd}) > 0) { + $ENV{GIT_DIFFTOOL_EXTCMD} = $opts{extcmd}; + } else { + print __("No <cmd> given for --extcmd=<cmd>\n"); + usage(1); + } + } + if ($opts{gui}) { + my $guitool = Git::config('diff.guitool'); + if (defined($guitool) && length($guitool) > 0) { + $ENV{GIT_DIFF_TOOL} = $guitool; + } + } + + if (!defined $opts{trust_exit_code}) { + $opts{trust_exit_code} = Git::config_bool('difftool.trustExitCode'); + } + if ($opts{trust_exit_code}) { + $ENV{GIT_DIFFTOOL_TRUST_EXIT_CODE} = 'true'; + } else { + $ENV{GIT_DIFFTOOL_TRUST_EXIT_CODE} = 'false'; + } + + # In directory diff mode, 'git-difftool--helper' is called once + # to compare the a/b directories. In file diff mode, 'git diff' + # will invoke a separate instance of 'git-difftool--helper' for + # each file that changed. + if (defined($opts{dirdiff})) { + dir_diff($opts{extcmd}, $opts{symlinks}); + } else { + file_diff($opts{prompt}); + } +} + +sub dir_diff +{ + my ($extcmd, $symlinks) = @_; + my $rc; + my $error = 0; + my $repo = Git->repository(); + my $repo_path = $repo->repo_path(); + my $worktree = $repo->wc_path(); + $worktree =~ s|/$||; # Avoid double slashes in symlink targets + my ($a, $b, $tmpdir, @files) = setup_dir_diff($worktree, $symlinks); + + if (defined($extcmd)) { + $rc = system($extcmd, $a, $b); + } else { + $ENV{GIT_DIFFTOOL_DIRDIFF} = 'true'; + $rc = system('git', 'difftool--helper', $a, $b); + } + # If the diff including working copy files and those + # files were modified during the diff, then the changes + # should be copied back to the working tree. + # Do not copy back files when symlinks are used and the + # external tool did not replace the original link with a file. + # + # These hashes are loaded lazily since they aren't needed + # in the common case of --symlinks and the difftool updating + # files through the symlink. + my %wt_modified; + my %tmp_modified; + my $indices_loaded = 0; + + for my $file (@files) { + next if $symlinks && -l "$b/$file"; + next if ! -f "$b/$file"; + + if (!$indices_loaded) { + %wt_modified = changed_files( + $repo_path, "$tmpdir/wtindex", $worktree); + %tmp_modified = changed_files( + $repo_path, "$tmpdir/wtindex", $b); + $indices_loaded = 1; + } + + if (exists $wt_modified{$file} and exists $tmp_modified{$file}) { + warn sprintf(__( + "warning: Both files modified:\n" . + "'%s/%s' and '%s/%s'.\n" . + "warning: Working tree file has been left.\n" . + "warning:\n"), $worktree, $file, $b, $file); + $error = 1; + } elsif (exists $tmp_modified{$file}) { + my $mode = stat("$b/$file")->mode; + copy("$b/$file", $file) or + exit_cleanup($tmpdir, 1); + + chmod($mode, $file) or + exit_cleanup($tmpdir, 1); + } + } + if ($error) { + warn sprintf(__( + "warning: Temporary files exist in '%s'.\n" . + "warning: You may want to cleanup or recover these.\n"), $tmpdir); + exit(1); + } else { + exit_cleanup($tmpdir, $rc); + } +} + +sub file_diff +{ + my ($prompt) = @_; + + if (defined($prompt)) { + if ($prompt) { + $ENV{GIT_DIFFTOOL_PROMPT} = 'true'; + } else { + $ENV{GIT_DIFFTOOL_NO_PROMPT} = 'true'; + } + } + + $ENV{GIT_PAGER} = ''; + $ENV{GIT_EXTERNAL_DIFF} = 'git-difftool--helper'; + + # ActiveState Perl for Win32 does not implement POSIX semantics of + # exec* system call. It just spawns the given executable and finishes + # the starting program, exiting with code 0. + # system will at least catch the errors returned by git diff, + # allowing the caller of git difftool better handling of failures. + my $rc = system('git', 'diff', @ARGV); + exit($rc | ($rc >> 8)); +} + +main(); |