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[PATCH RFC] docker: automatic dependencies for dockerfiles
From: |
John Snow |
Subject: |
[PATCH RFC] docker: automatic dependencies for dockerfiles |
Date: |
Thu, 19 Sep 2019 20:18:23 -0400 |
This is a demo for using makefile dependencies for image requisites.
Honestly, I don't like it -- Makefile sorcery is a bit beyond my
comprehension.
This is as near as I could stab, and it has the unfortunate requisite
that it will generate all of the *.d files at first run and not in an
on-demand way. Boo.
But, I wanted to raise the point that manually managing the variables
is not long-term viable -- we should manage them automatically if we
can.
As far as "partial" images vs "full" images, we should manage this
too; perhaps by subdirectory on the dockerfiles -- that way these
won't get out of date, either.
Signed-off-by: John Snow <address@hidden>
---
tests/docker/Makefile.include | 37 ++++++++-------------------------
tests/docker/deputil.py | 39 +++++++++++++++++++++++++++++++++++
2 files changed, 48 insertions(+), 28 deletions(-)
create mode 100755 tests/docker/deputil.py
diff --git a/tests/docker/Makefile.include b/tests/docker/Makefile.include
index 50a400b573..266395d927 100644
--- a/tests/docker/Makefile.include
+++ b/tests/docker/Makefile.include
@@ -21,6 +21,7 @@ DOCKER_TOOLS := travis
ENGINE := auto
DOCKER_SCRIPT=$(SRC_PATH)/tests/docker/docker.py --engine $(ENGINE)
+DEPTOOL=$(SRC_PATH)/tests/docker/deputil.py
TESTS ?= %
IMAGES ?= %
@@ -47,12 +48,12 @@ docker-image: ${DOCKER_TARGETS}
# invoked with SKIP_DOCKER_BUILD we still check the image is up to date
# though
ifdef SKIP_DOCKER_BUILD
-docker-image-%: $(DOCKER_FILES_DIR)/%.docker
+docker-image-%: $(DOCKER_FILES_DIR)/%.docker %.d
$(call quiet-command, \
$(DOCKER_SCRIPT) check --quiet qemu:$* $<, \
"CHECK", "$*")
else
-docker-image-%: $(DOCKER_FILES_DIR)/%.docker
+docker-image-%: $(DOCKER_FILES_DIR)/%.docker %.d
$(call quiet-command,\
$(DOCKER_SCRIPT) build qemu:$* $< \
$(if $V,,--quiet) $(if $(NOCACHE),--no-cache) \
@@ -88,23 +89,17 @@ docker-binfmt-image-debian-%:
$(DOCKER_FILES_DIR)/debian-bootstrap.docker
endif
# Enforce dependencies for composite images
-docker-image-debian9-mxe: docker-image-debian9
+%.d: $(DOCKER_FILES_DIR)/%.docker
+ $(call quiet-command, $(DEPTOOL) $(DOCKER_FILES_DIR)/$*.docker > $@)
+
+DEPFILES := $(DOCKER_IMAGES:%=%.d)
+include $(DEPFILES)
+
ifeq ($(ARCH),x86_64)
-docker-image-debian-amd64: docker-image-debian9
DOCKER_PARTIAL_IMAGES += debian-amd64-cross
else
-docker-image-debian-amd64-cross: docker-image-debian10
DOCKER_PARTIAL_IMAGES += debian-amd64
endif
-docker-image-debian-armel-cross: docker-image-debian9
-docker-image-debian-armhf-cross: docker-image-debian9
-docker-image-debian-mips-cross: docker-image-debian9
-docker-image-debian-mipsel-cross: docker-image-debian9
-docker-image-debian-mips64el-cross: docker-image-debian9
-docker-image-debian-ppc64el-cross: docker-image-debian9
-docker-image-debian-s390x-cross: docker-image-debian9
-docker-image-debian-win32-cross: docker-image-debian9-mxe
-docker-image-debian-win64-cross: docker-image-debian9-mxe
# For non-x86 hosts not all cross-compilers have been packaged
ifneq ($(ARCH),x86_64)
@@ -115,22 +110,8 @@ DOCKER_PARTIAL_IMAGES += debian-win32-cross
debian-win64-cross
DOCKER_PARTIAL_IMAGES += fedora travis
endif
-docker-image-debian-alpha-cross: docker-image-debian10
-docker-image-debian-arm64-cross: docker-image-debian10
-docker-image-debian-hppa-cross: docker-image-debian10
-docker-image-debian-m68k-cross: docker-image-debian10
-docker-image-debian-mips64-cross: docker-image-debian10
-docker-image-debian-powerpc-cross: docker-image-debian10
-docker-image-debian-ppc64-cross: docker-image-debian10
-docker-image-debian-riscv64-cross: docker-image-debian10
-docker-image-debian-sh4-cross: docker-image-debian10
-docker-image-debian-sparc64-cross: docker-image-debian10
-
docker-image-travis: NOUSER=1
-# Specialist build images, sometimes very limited tools
-docker-image-tricore-cross: docker-image-debian9
-
# These images may be good enough for building tests but not for test builds
DOCKER_PARTIAL_IMAGES += debian-alpha-cross
DOCKER_PARTIAL_IMAGES += debian-hppa-cross
diff --git a/tests/docker/deputil.py b/tests/docker/deputil.py
new file mode 100755
index 0000000000..69711cf85e
--- /dev/null
+++ b/tests/docker/deputil.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+import os
+import re
+import sys
+from typing import IO, Optional
+
+def get_dep(infile: IO[str]) -> Optional[str]:
+ """Get a dependency as a string from a dockerfile."""
+ for line in infile:
+ match = re.match(r'FROM (.+)', line)
+ if match:
+ return match[1]
+ return None
+
+def get_qemu_dep(infile: IO[str]) -> Optional[str]:
+ """Get a dependency on the qemu: namespace from a dockerfile."""
+ dep = get_dep(infile) or ''
+ match = re.match(r'qemu:(.+)', dep)
+ return match[1] if match else None
+
+def main() -> None:
+ filename = sys.argv[1]
+ basefile = os.path.basename(filename)
+ base = os.path.splitext(basefile)[0]
+ depfile = f"{base}.d"
+ deps = [filename]
+
+ print(f"{depfile}: {filename}")
+ with open(filename, "r") as infile:
+ match = get_qemu_dep(infile) or ''
+ if match:
+ deps.append(f"docker-image-{match}")
+ print("{}: {}".format(
+ f"docker-image-{base}",
+ " ".join(deps)
+ ))
+
+if __name__ == '__main__':
+ main()
--
2.21.0
- [PATCH RFC] docker: automatic dependencies for dockerfiles,
John Snow <=