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branch, for-each-ref, tag: add option to omit empty lines

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If the given format string expands to the empty string, a newline is
still printed. This makes using the output linewise more tedious. For
example, git update-ref --stdin does not accept empty lines.

Add options to "git branch", "git for-each-ref", and "git tag" to
not print these empty lines.  The default behavior remains the same.

Signed-off-by: Øystein Walle <oystwa@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Øystein Walle
2023-04-07 19:53:16 +02:00
committed by Junio C Hamano
parent 73876f4861
commit aabfdc9514
9 changed files with 75 additions and 4 deletions
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7
builtin/for-each-ref.c
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@ -19,7 +19,7 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
int i;
struct ref_sorting *sorting;
struct string_list sorting_options = STRING_LIST_INIT_DUP;
int maxcount = 0, icase = 0;
int maxcount = 0, icase = 0, omit_empty = 0;
struct ref_array array;
struct ref_filter filter;
struct ref_format format = REF_FORMAT_INIT;
@ -35,6 +35,8 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
N_("quote placeholders suitably for python"), QUOTE_PYTHON),
OPT_BIT(0 , "tcl", &format.quote_style,
N_("quote placeholders suitably for Tcl"), QUOTE_TCL),
OPT_BOOL(0, "omit-empty", &omit_empty,
N_("do not output a newline after empty formatted refs")),
OPT_GROUP(""),
OPT_INTEGER( 0 , "count", &maxcount, N_("show only <n> matched refs")),
@ -88,7 +90,8 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
if (format_ref_array_item(array.items[i], &format, &output, &err))
die("%s", err.buf);
fwrite(output.buf, 1, output.len, stdout);
putchar('\n');
if (output.len || !omit_empty)
putchar('\n');
}
strbuf_release(&err);