varmod-gmtime.mk revision 1.27
1 # $NetBSD: varmod-gmtime.mk,v 1.27 2025/01/11 20:54:45 rillig Exp $ 2 # 3 # Tests for the :gmtime variable modifier, which formats a timestamp 4 # using strftime(3) in UTC. 5 # 6 # See also: 7 # varmod-localtime.mk 8 9 .if ${TZ:Uundefined} != "undefined" # see unit-tests/Makefile 10 . error 11 .endif 12 13 # Test for the default time format, %c. Since the time always varies, it's 14 # only possible to check for the general format here. The names of the 15 # month and weekday are always in English, independent from the locale. 16 # Example: Thu Oct 29 18:56:41 2020 17 .if ${:U:gmtime:tW:M??? ??? ?? ??\:??\:?? ????} == "" 18 . error 19 .endif 20 21 22 # modifier name too short, falling back to the SysV modifier. 23 .if ${%Y:L:gmtim=1593536400} != "%Y" 24 . error 25 .endif 26 27 28 # 2020-07-01T00:00:00Z 29 .if ${%Y:L:gmtime=1593536400} != "2020" 30 . error 31 .endif 32 33 34 # modifier name too long, falling back to the SysV modifier. 35 .if ${%Y:L:gmtimer=1593536400} != "%Y" 36 . error 37 .endif 38 39 40 # If the modifier name is not matched exactly, fall back to the 41 # :from=to modifier. 42 .if ${gmtime:L:gm%=local%} != "localtime" 43 . error 44 .endif 45 46 47 # Before var.c 1.1050 from 2023-05-09, it was not possible to pass the 48 # seconds via an expression. 49 .if ${%Y:L:gmtime=${:U1593536400}} != "2020" 50 . error 51 .endif 52 53 54 # Before var.c 1.631 from 2020-10-31 21:40:20, it was possible to pass 55 # negative time stamps to the :gmtime modifier, resulting in dates before 56 # 1970. Going back 50 years in the past is not a practical use case for 57 # make. Therefore, since var.c 1.631, negative time stamps produce a 58 # parse error. 59 # expect+1: Invalid time value "-1" 60 .if ${:L:gmtime=-1} != "" 61 . error 62 .else 63 . error 64 .endif 65 66 67 # Spaces were allowed before var.c 1.631 from 2020-10-31 21:40:20, not 68 # because it would make sense but just as a side-effect from using strtoul. 69 # expect+1: Invalid time value " 1" 70 .if ${:L:gmtime= 1} != "" 71 . error 72 .else 73 . error 74 .endif 75 76 77 # 0 means now; this differs from GNode.mtime, where a 0 means nonexistent. 78 # Since "now" constantly changes, the strongest possible test is to match the 79 # resulting pattern. 80 .if !${:L:gmtime=0:tW:M??? ??? ?? ??\:??\:?? 20??} 81 . error 82 .endif 83 84 85 .if ${:L:gmtime=1} != "Thu Jan 1 00:00:01 1970" 86 . error 87 .endif 88 89 90 # INT32_MAX 91 .if ${:L:gmtime=2147483647} != "Tue Jan 19 03:14:07 2038" 92 . error 93 .endif 94 95 96 .if ${:L:gmtime=2147483648} == "Tue Jan 19 03:14:08 2038" 97 # All systems that have unsigned time_t or 64-bit time_t. 98 .elif ${:L:gmtime=2147483648} == "Fri Dec 13 20:45:52 1901" 99 # FreeBSD-12.0-i386 still has 32-bit signed time_t, see 100 # sys/x86/include/_types.h, __LP64__. 101 # 102 # Linux on 32-bit systems may still have 32-bit signed time_t, see 103 # sysdeps/unix/sysv/linux/generic/bits/typesizes.h, __TIMESIZE. 104 .else 105 . error 106 .endif 107 108 109 # Integer overflow, at least before var.c 1.631 from 2020-10-31. 110 # Because this modifier is implemented using strtoul, the parsed time was 111 # ULONG_MAX, which got converted to -1. This resulted in a time stamp of 112 # the second before 1970. 113 # 114 # Since var.c 1.631 from 2020-10-31, the overflow is detected and produces a 115 # parse error. 116 # expect+1: Invalid time value "10000000000000000000000000000000" 117 .if ${:L:gmtime=10000000000000000000000000000000} != "" 118 . error 119 .else 120 . error 121 .endif 122 123 # Before var.c 1.631 from 2020-10-31, there was no error handling while 124 # parsing the :gmtime modifier, thus no error message was printed. Parsing 125 # stopped after the '=', and the remaining string was parsed for more variable 126 # modifiers. Because of the unknown modifier 'e' from the 'error', the whole 127 # variable value was discarded and thus not printed. 128 # expect+1: Invalid time value "error" 129 .if ${:L:gmtime=error} != "" 130 . error 131 .else 132 . error 133 .endif 134 135 # Before var.c 1.1050 from 2023-05-09, the timestamp could be directly 136 # followed by the next modifier, without a ':' separator. This was the same 137 # bug as for the ':L' and ':P' modifiers. 138 # expect+1: Invalid time value "100000S,1970,bad," 139 .if ${%Y:L:gmtime=100000S,1970,bad,} != "bad" 140 . error 141 .endif 142 143 144 # Before var.c 1.1062 from 2023-08-19, ':gmtime' but not ':localtime' reported 145 # wrong values for '%s', depending on the operating system and the timezone. 146 export TZ=UTC 147 .for t in ${%s:L:gmtime} ${%s:L:localtime} 148 TIMESTAMPS+= $t 149 .endfor 150 export TZ=Europe/Berlin 151 .for t in ${%s:L:gmtime} ${%s:L:localtime} 152 TIMESTAMPS+= $t 153 .endfor 154 export TZ=UTC 155 .for t in ${%s:L:gmtime} ${%s:L:localtime} 156 TIMESTAMPS+= $t 157 .endfor 158 export TZ=America/Los_Angeles 159 .for t in ${%s:L:gmtime} ${%s:L:localtime} 160 TIMESTAMPS+= $t 161 .endfor 162 export TZ=UTC 163 .for t in ${%s:L:gmtime} ${%s:L:localtime} 164 TIMESTAMPS+= $t 165 .endfor 166 .for a b in ${TIMESTAMPS:[1]} ${TIMESTAMPS:@t@$t $t@} ${TIMESTAMPS:[-1]} 167 . if $a > $b 168 . warning timestamp $a > $b 169 . endif 170 .endfor 171 172 173 .if ${year=%Y month=%m day=%d:L:gmtime=1459494000} != "year=2016 month=04 day=01" 174 . error 175 .endif 176 # Slightly contorted syntax to convert a UTC timestamp from an expression to a 177 # formatted timestamp. 178 .if ${%Y%m%d:L:${gmtime=${:U1459494000}:L}} != "20160401" 179 . error 180 .endif 181 182 183 all: 184
Indexes created Sat Oct 11 19:10:01 GMT 2025