portability: use py script instead of 'date -d @1234'
On FreeBSD, the 'date' command's -d option has a completely different meaning. Instead, use a small python script to do the date format conversion, which should be more portable. As a side effect, we now also use UTC instead of the build server's timezone, which may be considered a more international choice. Add build/unix-time-to-fmt.py, call in build/Makefile.asciidoc.inc. Change-Id: I91a40656184f553ee375216d8ba5c7788fe9990d
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BUILDDIR = $(TOPDIR)/build
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BUILDDIR = $(TOPDIR)/build
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GIT_VERSION := $(shell git describe --abbrev=4 --dirty --always --tags)
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GIT_VERSION := $(shell git describe --abbrev=4 --dirty --always --tags)
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GIT_DATE := $(shell date -d @`git log -n 1 "--pretty=%at" ../.` "+%Y-%b-%e")
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GIT_DATE := $(shell $(TOPDIR)/build/unix-time-to-fmt.py `git log -n 1 "--pretty=%at" ../.`)
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# prepend the document name with the version numbe suffix
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# prepend the document name with the version numbe suffix
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#DOCS_VER = $(foreach P, $(ASCIIDOCS), $(P)-v$(shell xmllint --recover --xpath "//revnumber[position()=last()]/text()" $(P)-docinfo.xml 2>/dev/null))
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#DOCS_VER = $(foreach P, $(ASCIIDOCS), $(P)-v$(shell xmllint --recover --xpath "//revnumber[position()=last()]/text()" $(P)-docinfo.xml 2>/dev/null))
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#!/usr/bin/env python3
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"""
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Usage:
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unix-time-to-fmt.py 1234567 [%Y-%m-%d[...]]
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Convert unix timestamp to a string of the given format in UTC, according to
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https://docs.python.org/2/library/time.html
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Default is '%Y-%b-%d' --> 2016-Jan-01
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"""
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import sys, time
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fmt = '%Y-%b-%d'
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if len(sys.argv) > 2:
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fmt = sys.argv[2]
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print(time.strftime(fmt, time.gmtime(float(sys.argv[1]))))
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