diff options
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | Makefile | 3 | ||||
| -rw-r--r-- | builtin.h | 1 | ||||
| -rw-r--r-- | builtin/difftool.c | 63 | ||||
| -rwxr-xr-x | git-legacy-difftool.perl (renamed from git-difftool.perl) | 0 | ||||
| -rw-r--r-- | git.c | 6 | ||||
| -rwxr-xr-x | t/t7800-difftool.sh | 2 |
7 files changed, 75 insertions, 1 deletions
diff --git a/.gitignore b/.gitignore index 05cb58a3d..f96e50ed4 100644 --- a/.gitignore +++ b/.gitignore @@ -76,6 +76,7 @@ /git-init-db /git-interpret-trailers /git-instaweb +/git-legacy-difftool /git-log /git-ls-files /git-ls-remote @@ -527,7 +527,7 @@ SCRIPT_LIB += git-sh-setup SCRIPT_LIB += git-sh-i18n SCRIPT_PERL += git-add--interactive.perl -SCRIPT_PERL += git-difftool.perl +SCRIPT_PERL += git-legacy-difftool.perl SCRIPT_PERL += git-archimport.perl SCRIPT_PERL += git-cvsexportcommit.perl SCRIPT_PERL += git-cvsimport.perl @@ -888,6 +888,7 @@ BUILTIN_OBJS += builtin/diff-files.o BUILTIN_OBJS += builtin/diff-index.o BUILTIN_OBJS += builtin/diff-tree.o BUILTIN_OBJS += builtin/diff.o +BUILTIN_OBJS += builtin/difftool.o BUILTIN_OBJS += builtin/fast-export.o BUILTIN_OBJS += builtin/fetch-pack.o BUILTIN_OBJS += builtin/fetch.o @@ -60,6 +60,7 @@ extern int cmd_diff_files(int argc, const char **argv, const char *prefix); extern int cmd_diff_index(int argc, const char **argv, const char *prefix); extern int cmd_diff(int argc, const char **argv, const char *prefix); extern int cmd_diff_tree(int argc, const char **argv, const char *prefix); +extern int cmd_difftool(int argc, const char **argv, const char *prefix); extern int cmd_fast_export(int argc, const char **argv, const char *prefix); extern int cmd_fetch(int argc, const char **argv, const char *prefix); extern int cmd_fetch_pack(int argc, const char **argv, const char *prefix); diff --git a/builtin/difftool.c b/builtin/difftool.c new file mode 100644 index 000000000..53870bbaf --- /dev/null +++ b/builtin/difftool.c @@ -0,0 +1,63 @@ +/* + * "git difftool" builtin command + * + * 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'. + * + * Copyright (C) 2016 Johannes Schindelin + */ +#include "builtin.h" +#include "run-command.h" +#include "exec_cmd.h" + +/* + * NEEDSWORK: this function can go once the legacy-difftool Perl script is + * retired. + * + * We intentionally avoid reading the config directly here, to avoid messing up + * the GIT_* environment variables when we need to fall back to exec()ing the + * Perl script. + */ +static int use_builtin_difftool(void) { + struct child_process cp = CHILD_PROCESS_INIT; + struct strbuf out = STRBUF_INIT; + int ret; + + argv_array_pushl(&cp.args, + "config", "--bool", "difftool.usebuiltin", NULL); + cp.git_cmd = 1; + if (capture_command(&cp, &out, 6)) + return 0; + strbuf_trim(&out); + ret = !strcmp("true", out.buf); + strbuf_release(&out); + return ret; +} + +int cmd_difftool(int argc, const char **argv, const char *prefix) +{ + /* + * NEEDSWORK: Once the builtin difftool has been tested enough + * and git-legacy-difftool.perl is retired to contrib/, this preamble + * can be removed. + */ + if (!use_builtin_difftool()) { + const char *path = mkpath("%s/git-legacy-difftool", + git_exec_path()); + + if (sane_execvp(path, (char **)argv) < 0) + die_errno("could not exec %s", path); + + return 0; + } + prefix = setup_git_directory(); + trace_repo_setup(prefix); + setup_work_tree(); + + die("TODO"); +} diff --git a/git-difftool.perl b/git-legacy-difftool.perl index a5790d03a..a5790d03a 100755 --- a/git-difftool.perl +++ b/git-legacy-difftool.perl @@ -424,6 +424,12 @@ static struct cmd_struct commands[] = { { "diff-files", cmd_diff_files, RUN_SETUP | NEED_WORK_TREE }, { "diff-index", cmd_diff_index, RUN_SETUP }, { "diff-tree", cmd_diff_tree, RUN_SETUP }, + /* + * NEEDSWORK: Once the redirection to git-legacy-difftool.perl in + * builtin/difftool.c has been removed, this entry should be changed to + * RUN_SETUP | NEED_WORK_TREE + */ + { "difftool", cmd_difftool }, { "fast-export", cmd_fast_export, RUN_SETUP }, { "fetch", cmd_fetch, RUN_SETUP }, { "fetch-pack", cmd_fetch_pack, RUN_SETUP }, diff --git a/t/t7800-difftool.sh b/t/t7800-difftool.sh index 70a2de461..b6a6c30f2 100755 --- a/t/t7800-difftool.sh +++ b/t/t7800-difftool.sh @@ -23,6 +23,8 @@ prompt_given () test "$prompt" = "Launch 'test-tool' [Y/n]? branch" } +# NEEDSWORK: lose all the PERL prereqs once legacy-difftool is retired. + # Create a file on master and change it on branch test_expect_success PERL 'setup' ' echo master >file && |