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json: add new output flag JSON_PRETTY_AUTO 

This takes inspiration from JSON_COLOR_AUTO: it will automatically map
to JSON_PRETTY if connected to a TTY and JSON_NEWLINE otherwise.
This commit is contained in:
Lennart Poettering 2019-08-15 09:36:04 +02:00
parent 19a209cc71
commit 2d8143048b
2 changed files with 12 additions and 8 deletions
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3
src/shared/json.c
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@ -1757,6 +1757,9 @@ void json_variant_dump(JsonVariant *v, JsonFormatFlags flags, FILE *f, const cha
if (((flags & (JSON_FORMAT_COLOR_AUTO|JSON_FORMAT_COLOR)) == JSON_FORMAT_COLOR_AUTO) && colors_enabled())
flags |= JSON_FORMAT_COLOR;
if (((flags & (JSON_FORMAT_PRETTY_AUTO|JSON_FORMAT_PRETTY)) == JSON_FORMAT_PRETTY_AUTO))
flags |= on_tty() ? JSON_FORMAT_PRETTY : JSON_FORMAT_NEWLINE;
if (flags & JSON_FORMAT_SSE)
fputs("data: ", f);
if (flags & JSON_FORMAT_SEQ)

17
src/shared/json.h
View File

@ -161,14 +161,15 @@ struct json_variant_foreach_state {
int json_variant_get_source(JsonVariant *v, const char **ret_source, unsigned *ret_line, unsigned *ret_column);
typedef enum JsonFormatFlags {
JSON_FORMAT_NEWLINE = 1 << 0, /* suffix with newline */
JSON_FORMAT_PRETTY = 1 << 1, /* add internal whitespace to appeal to human readers */
JSON_FORMAT_COLOR = 1 << 2, /* insert ANSI color sequences */
JSON_FORMAT_COLOR_AUTO = 1 << 3, /* insert ANSI color sequences if colors_enabled() says so */
JSON_FORMAT_SOURCE = 1 << 4, /* prefix with source filename/line/column */
JSON_FORMAT_SSE = 1 << 5, /* prefix/suffix with W3C server-sent events */
JSON_FORMAT_SEQ = 1 << 6, /* prefix/suffix with RFC 7464 application/json-seq */
JSON_FORMAT_FLUSH = 1 << 7, /* call fflush() after dumping JSON */
JSON_FORMAT_NEWLINE = 1 << 0, /* suffix with newline */
JSON_FORMAT_PRETTY = 1 << 1, /* add internal whitespace to appeal to human readers */
JSON_FORMAT_PRETTY_AUTO = 1 << 2, /* same, but only if connected to a tty (and JSON_FORMAT_NEWLINE otherwise) */
JSON_FORMAT_COLOR = 1 << 3, /* insert ANSI color sequences */
JSON_FORMAT_COLOR_AUTO = 1 << 4, /* insert ANSI color sequences if colors_enabled() says so */
JSON_FORMAT_SOURCE = 1 << 5, /* prefix with source filename/line/column */
JSON_FORMAT_SSE = 1 << 6, /* prefix/suffix with W3C server-sent events */
JSON_FORMAT_SEQ = 1 << 7, /* prefix/suffix with RFC 7464 application/json-seq */
JSON_FORMAT_FLUSH = 1 << 8, /* call fflush() after dumping JSON */
} JsonFormatFlags;
int json_variant_format(JsonVariant *v, JsonFormatFlags flags, char **ret);