1 # $NetBSD: varmod-gmtime.mk,v 1.6 2020/10/31 20:30:06 rillig Exp $
3 # Tests for the :gmtime variable modifier, which formats a timestamp
4 # using strftime(3) in UTC.
7 all: mod-gmtime-indirect
10 # Test for the default time format, %c. Since the time always varies, it's
11 # only possible to check for the general format here. The names of the
12 # month and weekday are always in English, independent from the locale.
13 # Example: Thu Oct 29 18:56:41 2020
14 .if ${:U:gmtime:tW:M??? ??? ?? ??\:??\:?? ????} == ""
21 # modifier name too short
22 @echo ${%Y:L:gmtim=1593536400}
24 # 2020-07-01T00:00:00Z
25 @echo ${%Y:L:gmtime=1593536400}
27 # modifier name too long
28 @echo ${%Y:L:gmtimer=1593536400}
30 # If the modifier name is not matched exactly, fall back to the
32 @echo ${gmtime:L:gm%=local%} == localtime
37 # As of 2020-08-16, it is not possible to pass the seconds via a
38 # variable expression. This is because parsing of the :gmtime
39 # modifier stops at the '$' and returns to ApplyModifiers.
41 # There, a colon would be skipped but not a dollar.
42 # Parsing therefore continues at the '$' of the ${:U159...}, looking
43 # for an ordinary variable modifier.
45 # At this point, the ${:U} is expanded and interpreted as a variable
46 # modifier, which results in the error message "Unknown modifier '1'".
48 # If ApplyModifier_Gmtime were to pass its argument through
49 # ParseModifierPart, this would work.
50 @echo ${%Y:L:gmtime=${:U1593536400}}
55 # As of 2020-10-31, it is possible to pass negative time stamps
56 # to the :gmtime modifier, resulting in dates before 1970.
57 # Going back 50 years in the past is not a practical use case for
59 : -1 becomes ${:L:gmtime=-1}.
61 # Spaces are allowed, not because it would make sense but just as
62 # a side-effect from using strtoul.
63 : space 1 becomes ${:L:gmtime= 1}.
65 # 0 means now; to get consistent test results, the actual value has
67 : 0 becomes ${:L:gmtime=0:C,^... ... .. ..:..:.. 20..$,ok,W}.
69 : 1 becomes ${:L:gmtime=1}.
71 : INT32_MAX becomes ${:L:gmtime=2147483647}.
73 # This may be different if time_t is still a 32-bit signed integer.
74 : INT32_MAX + 1 becomes ${:L:gmtime=2147483648}.
77 # Because this modifier is implemented using strtoul, the parsed
78 # time is ULONG_MAX, which gets converted to -1. This results
79 # in a time stamp of the second before 1970.
80 : overflow becomes ${:L:gmtime=10000000000000000000000000000000}.
82 # As of 2020-10-31, there is no error handling while parsing the
83 # :gmtime modifier, thus no error message is printed. Parsing
84 # stops after the '=', and the remaining string is parsed for
85 # more variable modifiers. Because of the unknown modifier 'e',
86 # the whole variable value is discarded and thus not printed.
87 : letter becomes ${:L:gmtime=error}.