diff options
| -rw-r--r-- | Documentation/config.txt | 4 | ||||
| -rw-r--r-- | diff.c | 13 | ||||
| -rwxr-xr-x | t/t4029-diff-trailing-space.sh | 39 |
3 files changed, 56 insertions, 0 deletions
diff --git a/Documentation/config.txt b/Documentation/config.txt index 676c39bb8..902067586 100644 --- a/Documentation/config.txt +++ b/Documentation/config.txt @@ -567,6 +567,10 @@ diff.autorefreshindex:: affects only 'git-diff' Porcelain, and not lower level 'diff' commands, such as 'git-diff-files'. +diff.suppress-blank-empty:: + A boolean to inhibit the standard behavior of printing a space + before each empty output line. Defaults to false. + diff.external:: If this config variable is set, diff generation is not performed using the internal diff machinery, but using the @@ -20,6 +20,7 @@ static int diff_detect_rename_default; static int diff_rename_limit_default = 200; +static int diff_suppress_blank_empty; int diff_use_color_default = -1; static const char *external_diff_cmd_cfg; int diff_auto_refresh_index = 1; @@ -176,6 +177,12 @@ int git_diff_basic_config(const char *var, const char *value, void *cb) return 0; } + /* like GNU diff's --suppress-blank-empty option */ + if (!strcmp(var, "diff.suppress-blank-empty")) { + diff_suppress_blank_empty = git_config_bool(var, value); + return 0; + } + if (!prefixcmp(var, "diff.")) { const char *ep = strrchr(var, '.'); if (ep != var + 4) { @@ -580,6 +587,12 @@ static void fn_out_consume(void *priv, char *line, unsigned long len) ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; } + if (diff_suppress_blank_empty + && len == 2 && line[0] == ' ' && line[1] == '\n') { + line[0] = '\n'; + len = 1; + } + /* This is not really necessary for now because * this codepath only deals with two-way diffs. */ diff --git a/t/t4029-diff-trailing-space.sh b/t/t4029-diff-trailing-space.sh new file mode 100755 index 000000000..4ca65e033 --- /dev/null +++ b/t/t4029-diff-trailing-space.sh @@ -0,0 +1,39 @@ +#!/bin/bash +# +# Copyright (c) Jim Meyering +# +test_description='diff honors config option, diff.suppress-blank-empty' + +. ./test-lib.sh + +cat <<\EOF > exp || +diff --git a/f b/f +index 5f6a263..8cb8bae 100644 +--- a/f ++++ b/f +@@ -1,2 +1,2 @@ + +-x ++y +EOF +exit 1 + +test_expect_success \ + "$test_description" \ + 'printf "\nx\n" > f && + git add f && + git commit -q -m. f && + printf "\ny\n" > f && + git config --bool diff.suppress-blank-empty true && + git diff f > actual && + test_cmp exp actual && + perl -i.bak -p -e "s/^\$/ /" exp && + git config --bool diff.suppress-blank-empty false && + git diff f > actual && + test_cmp exp actual && + git config --bool --unset diff.suppress-blank-empty && + git diff f > actual && + test_cmp exp actual + ' + +test_done |