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[pkgsrc/trunk]: pkgsrc/lang/go go: Introduce support for GO_DEPS.



details:   https://anonhg.NetBSD.org/pkgsrc/rev/cacf3d2b749f
branches:  trunk
changeset: 395900:cacf3d2b749f
user:      jperkin <jperkin%pkgsrc.org@localhost>
date:      Wed May 15 18:00:03 2019 +0000

description:
go: Introduce support for GO_DEPS.

This supports packages that require a large number of go-based dependencies,
treating them as additional distfiles and built inline as part of the package
build.  The print-go-deps target is helpful to generate the list of GO_DEPS
required for each package by parsing the Gopkg.lock file in the extracted
sources.

Thanks to rillig@ for various suggestions and comments.

diffstat:

 lang/go/go-dep.mk     |  127 ++++++++++++++++++++++++++++++++++++++++++++++++++
 lang/go/go-package.mk |    7 ++-
 2 files changed, 133 insertions(+), 1 deletions(-)

diffs (152 lines):

diff -r 3e5b42b9118e -r cacf3d2b749f lang/go/go-dep.mk
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lang/go/go-dep.mk Wed May 15 18:00:03 2019 +0000
@@ -0,0 +1,127 @@
+# $NetBSD: go-dep.mk,v 1.1 2019/05/15 18:00:03 jperkin Exp $
+#
+# This file implements dep (https://github.com/golang/dep) support in pkgsrc.
+#
+# === Package-settable variables ===
+#
+# GO_DEPS
+#      This is a list of dependencies of the format url:sha[:dir].  These
+#      dependencies can be generated using the print-go-deps helper target
+#      against an extracted WRKSRC, which parses the Godeps file contained in
+#      the source that would normally be used by dep.
+#
+#      Currently only GitHub URLs are supported, so if a Godeps dependency
+#      uses a different URL, the equivalent GitHub URL needs to be calculated
+#      and the original URL added as the optional :dir argument.  This file
+#      contains a list of GODEP_REDIRECTS which translates common redirects,
+#      and additions to this list are encouraged.
+#
+#      The print-go-deps target will reduce SHA strings to the first 8
+#      characters to avoid long lines, but the extracted archive will use the
+#      full SHA.
+#
+#      Examples:
+#              github.com/golang/protobuf:92554152
+#              github.com/collectd/go-collectd:2ce14454:collectd.org
+#              github.com/uber-go/atomic:8474b86a:go.uber.org/atomic
+#              github.com/golang/time:26559e0f:golang.org/x/time
+#
+# GODEP_REDIRECTS
+#      Maps a URL or subset of a URL to its GitHub equivalent.  URLs that are
+#      likely to be used across multiple packages should be added to this
+#      file, otherwise add them to the individual package Makefile.
+#
+#      Examples:
+#              collectd.org=github.com/collectd/go-collectd
+#              golang.org/x=github.com/golang
+#
+# Keywords: go golang deps go-deps print-go-deps
+
+_VARGROUPS+=           godeps
+_PKG_VARS.godeps=      GO_DEPS GODEP_REDIRECTS
+
+#
+# When using GO_DEPS a lot of additional distfiles will be added with just SHAs
+# for their filename.  Setting DIST_SUBDIR is required to keep things sensible.
+#
+DIST_SUBDIR=           ${PKGNAME_NOREV}
+
+#
+# For now fetching via GitHub is mandatory.
+#
+DISTFILES?=                    ${DEFAULT_DISTFILES}
+.for dep in ${GO_DEPS}
+GODEP_URL.${dep}:=             ${dep:C/:/ /g:[1]}
+GODEP_SHA.${dep}:=             ${dep:C/:/ /g:[2]}
+GODEP_DIR.${dep}:=             ${dep:C/:/ /g:[3]}
+.  if empty(GODEP_DIR.${dep})
+GODEP_DIR.${dep}:=             ${GODEP_URL.${dep}}
+.  endif
+GODEP_TGZ.${dep}:=             ${GODEP_SHA.${dep}}.tar.gz
+SITES.${GODEP_TGZ.${dep}}:=    ${MASTER_SITE_GITHUB}${GODEP_URL.${dep}:S,github.com/,,}/archive/
+DISTFILES+=                    ${GODEP_TGZ.${dep}}
+
+.PHONY: post-extract-${GODEP_URL.${dep}}
+post-extract: post-extract-${GODEP_URL.${dep}}
+post-extract-${GODEP_URL.${dep}}:
+       # We can't use :H here as the GODEP_DIR might just be a host.name
+       @${MKDIR} `${DIRNAME} ${WRKDIR}/src/${GODEP_DIR.${dep}}`
+       # The * glob is used as we shorten the SHA to 8 characters to keep
+       # GO_DEPS lines a reasonable length, but the extracted distfile uses
+       # the full SHA.
+       @${MV} ${WRKDIR}/${GODEP_URL.${dep}:T}-${GODEP_SHA.${dep}}* \
+               ${WRKDIR}/src/${GODEP_DIR.${dep}}
+.endfor
+
+#
+# Non-GitHub sites which are listed in Godeps files but redirect to GitHub.  We
+# fetch them from GitHub but move the source to the expected directory name.
+#
+GODEP_REDIRECTS+=      collectd.org=github.com/collectd/go-collectd
+GODEP_REDIRECTS+=      go.uber.org=github.com/uber-go
+GODEP_REDIRECTS+=      go4.org=github.com/go4org/go4
+GODEP_REDIRECTS+=      golang.org/x=github.com/golang
+GODEP_REDIRECTS+=      google.golang.org/appengine=github.com/golang/appengine
+GODEP_REDIRECTS+=      google.golang.org/genproto=github.com/google/go-genproto
+GODEP_REDIRECTS+=      google.golang.org/grpc=github.com/grpc/grpc-go
+GODEP_REDIRECTS+=      gopkg.in/DATA-DOG/go-sqlmock.v1=github.com/DATA-DOG/go-sqlmock
+GODEP_REDIRECTS+=      gopkg.in/check.v1=github.com/go-check/check
+GODEP_REDIRECTS+=      gopkg.in/mgo.v2=github.com/go-mgo/mgo
+GODEP_REDIRECTS+=      gopkg.in/tomb.v2=github.com/go-tomb/tomb
+GODEP_REDIRECTS+=      gopkg.in/yaml.v2=github.com/go-yaml/yaml
+GODEP_REDIRECTS+=      honnef.co/go/tools=github.com/dominikh/go-tools
+
+.for url in ${GODEP_REDIRECTS}
+_GODEP_FROM.${url}:=   ${url:C/=/ /g:[1]}
+_GODEP_TO.${url}:=     ${url:C/=/ /g:[2]}
+.endfor
+
+#
+# Add a print-go-deps target to aid GO_DEPS generation.  This depends on the
+# current format of the Gopkg.lock file which may change.
+#
+_GODEP_AWK+=   BEGIN { name=""; rev=""; dir=""; }
+_GODEP_AWK+=   $$1 == "name" {                                         \
+                       gsub(/\"/, "", $$NF);                           \
+                       ${GODEP_REDIRECTS:@url@                         \
+                       if (match($$NF, "^${_GODEP_FROM.${url}}")) {    \
+                               dir=$$NF;                               \
+                               gsub("^${_GODEP_FROM.${url}}",          \
+                                   "${_GODEP_TO.${url}}", $$NF);       \
+                       }@}                                             \
+                       name = $$NF;                                    \
+               }
+_GODEP_AWK+=   $$1 == "revision" {                                     \
+                       gsub(/\"/, "", $$NF);                           \
+                       rev = substr($$NF, 1, 8);                       \
+               }
+_GODEP_AWK+=   name && rev {                                           \
+                       printf("GO_DEPS+=\t%s:%s%s\n",                  \
+                           name, rev,                                  \
+                           (dir) ? ":" dir : "");                      \
+                       name=""; rev=""; dir="";                        \
+               }
+
+.PHONY: print-go-deps
+print-go-deps:
+       ${RUN} ${AWK} ${_GODEP_AWK:Q} ${WRKSRC}/Gopkg.lock
diff -r 3e5b42b9118e -r cacf3d2b749f lang/go/go-package.mk
--- a/lang/go/go-package.mk     Wed May 15 15:37:45 2019 +0000
+++ b/lang/go/go-package.mk     Wed May 15 18:00:03 2019 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: go-package.mk,v 1.21 2018/11/30 18:38:19 rillig Exp $
+# $NetBSD: go-package.mk,v 1.22 2019/05/15 18:00:03 jperkin Exp $
 #
 # This file implements common logic for compiling Go programs in pkgsrc.
 #
@@ -93,6 +93,11 @@
        ${RUN} cd ${WRKDIR}; [ ! -d pkg ] || ${PAX} -rw src pkg ${DESTDIR}${PREFIX}/gopkg
 .endif
 
+# Include go-dep.mk last as it hooks into post-extract
+.if defined(GO_DEPS)
+.  include "../../lang/go/go-dep.mk"
+.endif
+
 _VARGROUPS+=           go
 _PKG_VARS.go=          GO_SRCPATH GO_DIST_BASE GO_BUILD_PATTERN
 _USER_VARS.go=         GO_VERSION_DEFAULT



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