Re: [gentoo-catalyst] [PATCH 2/4] Remove self.mounts and self.mountmap's use of paths for keys and paths.

[Dylan Baker <baker.dylan.c@gmail.com>]

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On Friday, December 13, 2013 07:07:14 PM Brian Dolbec wrote:
> Migrate more hardcoded paths to use settings variables instead.
> ---
>  catalyst                        |  3 ++
>  modules/generic_stage_target.py | 80
> ++++++++++++++++++++--------------------- 2 files changed, 43
> insertions(+), 40 deletions(-)
> 
> diff --git a/catalyst b/catalyst
> index 19ec77e..60cea3e 100755
> --- a/catalyst
> +++ b/catalyst
> @@ -62,8 +62,11 @@ def parse_config(myconfig):
>  	config_file=""
> 
>  	confdefaults={
> +		"distdir": "/usr/portage/distfiles",
>  		"hash_function": "crc32",
> +		"packagedir": "/usr/portage/packages",
>  		"portdir": "/usr/portage",
> +		"port_tmpdir": "/var/tmp/portage",
>  		"repo_name": "portage",
>  		"sharedir": "/usr/lib/catalyst",
>  		"snapshot_name": "portage-",
> diff --git a/modules/generic_stage_target.py
> b/modules/generic_stage_target.py index c2888b6..342c65b 100644
> --- a/modules/generic_stage_target.py
> +++ b/modules/generic_stage_target.py
> @@ -179,11 +179,11 @@ class generic_stage_target(generic_target):
>  				
"/usr/portage":self.settings["snapshot_cache_path"]+"/portage",\
>  				
"/usr/portage/distfiles":self.settings["distdir"],"/var/tmp/portage":"t
> mpfs"} else:
> -			
self.mounts=["/proc","/dev","/usr/portage/distfiles","/var/tmp/portage"]
> -			
self.mountmap={"/proc":"/proc","/dev":"/dev","/dev/pts":"/dev/pts",\
> -				
"/usr/portage/distfiles":self.settings["distdir"],"/var/tmp/portage":"
> tmpfs"} 
> +			self.mounts=["proc","dev", "distdir", "port_tmpdir"]
> +			self.mountmap={"proc":"/proc", "dev":"/dev", "pts":"/dev/pts",
> +				"distdir":self.settings["distdir"], "port_tmpdir":"tmpfs"}

This is work for a seperate patch, but let's kill the self.mounts and replace 
it's use with self.mountmap.iterkeys()

>  		if os.uname()[0] == "Linux":
> -			self.mounts.append("/dev/pts")
> +			self.mounts.append("pts")
> 
>  		self.set_mounts()
> 
> @@ -195,16 +195,15 @@ class generic_stage_target(generic_target):
>  			self.set_pkgcache_path()
>  			print "Location of the package cache is "+\
>  				self.settings["pkgcache_path"]
> -			self.mounts.append("/usr/portage/packages")
> -			self.mountmap["/usr/portage/packages"]=\
> -				self.settings["pkgcache_path"]
> +			self.mounts.append("packagedir")
> +			self.mountmap["packagedir"] = self.settings["pkgcache_path"]
> 
>  		if "KERNCACHE" in self.settings:
>  			self.set_kerncache_path()
>  			print "Location of the kerncache is "+\
>  				self.settings["kerncache_path"]
> -			self.mounts.append("/tmp/kerncache")
> -			self.mountmap["/tmp/kerncache"]=self.settings["kerncache_path"]
> +			self.mounts.append("kerncache")
> +			self.mountmap["kerncache"]=self.settings["kerncache_path"]
> 
>  		if "CCACHE" in self.settings:
>  			if "CCACHE_DIR" in os.environ:
> @@ -216,8 +215,8 @@ class generic_stage_target(generic_target):
>  				raise CatalystError,\
>  					"Compiler cache support can't be enabled (can't find "+\
>  					ccdir+")"
> -			self.mounts.append("/var/tmp/ccache")
> -			self.mountmap["/var/tmp/ccache"]=ccdir
> +			self.mounts.append("ccache")
> +			self.mountmap["ccache"]=ccdir
>  			""" for the chroot: """
>  			self.env["CCACHE_DIR"]="/var/tmp/ccache"
> 
> @@ -406,7 +405,7 @@ class generic_stage_target(generic_target):
> 
>  	def set_cleanables(self):
>  		
self.settings["cleanables"]=["/etc/resolv.conf","/var/tmp/*","/tmp/*",\
> -			"/root/*","/usr/portage"]
> +			"/root/*", self.settings["portdir"]]
> 
>  	def set_snapshot_path(self):
>  		self.settings["snapshot_path"]=normpath(self.settings["storedir"]+\
> @@ -615,21 +614,21 @@ class generic_stage_target(generic_target):
>  			return
> 
>  		for x in self.mounts:
> -			if not os.path.exists(mypath+x):
> +			if not os.path.exists(mypath + self.mountmap[x]):
>  				continue
> 
> -			if ismount(mypath+x):
> +			if ismount(mypath +self.mountmap[x]):

add a space after the '+' operator

>  				""" Something is still mounted "" """
>  				try:
> -					print x+" is still mounted; performing auto-bind-
umount...",
> +					print self.mountmap[x] + " is still mounted; performing
> auto-bind-umount...", """ Try to umount stuff ourselves """
>  					self.unbind()
> -					if ismount(mypath+x):
> -						raise CatalystError, "Auto-unbind failed for "+x
> +					if ismount(mypath + self.mountmap[x]):
> +						raise CatalystError, "Auto-unbind failed for " + 
self.mountmap[x]
>  					else:
>  						print "Auto-unbind successful..."
>  				except CatalystError:
> -					raise CatalystError, "Unable to auto-unbind "+x
> +					raise CatalystError, "Unable to auto-unbind " + 
self.mountmap[x]
> 
>  	def unpack(self):
>  		unpack=True
> @@ -787,7 +786,7 @@ class generic_stage_target(generic_target):
>  				print "Valid snapshot cache, skipping unpack of portage 
tree..."
>  				unpack=False
>  		else:
> -			destdir=normpath(self.settings["chroot_path"]+"/usr/portage")
> +			destdir=normpath(self.settings["chroot_path"] +

add a space after the '=' operator

There's more of this. please look through and add spaces beteen all of the 
operators, at least on the lines you've touched. This is standard python 
coding style and adhering to it makes all of our lives easier :)

> self.settings["portdir"]) cleanup_errmsg="Error removing existing snapshot
> directory."
>  			cleanup_msg=\
>  				"Cleaning up existing portage tree (This can take a long 
time)..."
> @@ -801,7 +800,7 @@ class generic_stage_target(generic_target):
> 
>  			if "AUTORESUME" in self.settings \
>  				and os.path.exists(self.settings["chroot_path"]+\
> -					"/usr/portage/") \
> +					self.settings["portdir"]) \
>  				and os.path.exists(self.settings["autoresume_path"]\
>  					+"unpack_portage") \

>  				and self.settings["snapshot_path_hash"] == snapshot_hash:
> @@ -848,7 +847,7 @@ class generic_stage_target(generic_target):
>  			cmd("rm -f 
"+self.settings["chroot_path"]+"/etc/portage/make.profile",\
>  					"Error zapping profile link",env=self.env)
>  			cmd("mkdir -p "+self.settings["chroot_path"]+"/etc/portage/")
> -			cmd("ln -sf ../../usr/portage/profiles/"+\
> +			cmd("ln -sf ../.." + self.settings["portdir"] + "/profiles/"+\
>  				self.settings["target_profile"]+" "+\
>  				self.settings["chroot_path"]+"/etc/portage/make.profile",\
>  				"Error creating profile link",env=self.env)
> @@ -874,10 +873,10 @@ class generic_stage_target(generic_target):
>  				if os.path.exists(x):
>  					print "Copying overlay dir " +x
>  					cmd("mkdir -p "+self.settings["chroot_path"]+\
> -						"/usr/local/portage",\
> +						self.settings["local_overlay"],\
>  						"Could not make portage_overlay dir",env=self.env)
>  					cmd("cp -R "+x+"/* "+self.settings["chroot_path"]+\
> -						"/usr/local/portage",\
> +						self.settings["local_overlay"],\
>  						"Could not copy portage_overlay",env=self.env)
> 
>  	def root_overlay(self):
> @@ -897,7 +896,7 @@ class generic_stage_target(generic_target):
> 
>  	def bind(self):
>  		for x in self.mounts:
> -			if not os.path.exists(self.settings["chroot_path"]+x):
> +			if not os.path.exists(self.settings["chroot_path"] + 
self.mountmap[x]):
>  				os.makedirs(self.settings["chroot_path"]+x,0755)
> 
>  			if not os.path.exists(self.mountmap[x]):
> @@ -909,11 +908,11 @@ class generic_stage_target(generic_target):
>  				self.snapshot_lock_object.read_lock()
>  			if os.uname()[0] == "FreeBSD":
>  				if src == "/dev":
> -					retval=os.system("mount -t devfs none "+\
> -						self.settings["chroot_path"]+x)
> +					retval=os.system("mount -t devfs none " +
> +						self.settings["chroot_path"] + src)
>  				else:
> -					retval=os.system("mount_nullfs "+src+" "+\
> -						self.settings["chroot_path"]+x)
> +					retval=os.system("mount_nullfs " + src + " " +
> +						self.settings["chroot_path"] + src)
>  			else:
>  				if src == "tmpfs":
>  					if "var_tmpfs_portage" in self.settings:
> @@ -921,11 +920,11 @@ class generic_stage_target(generic_target):
>  							self.settings["var_tmpfs_portage"]+"G "+src+" "+\
>  							self.settings["chroot_path"]+x)
>  				else:
> -					retval=os.system("mount --bind "+src+" "+\
> -						self.settings["chroot_path"]+x)
> +					retval=os.system("mount --bind " + src + " " +
> +						self.settings["chroot_path"] + src)
>  			if retval!=0:
>  				self.unbind()
> -				raise CatalystError,"Couldn't bind mount "+src
> +				raise CatalystError,"Couldn't bind mount " + src
> 
>  	def unbind(self):
>  		ouch=0
> @@ -934,25 +933,26 @@ class generic_stage_target(generic_target):
>  		myrevmounts.reverse()
>  		""" Unmount in reverse order for nested bind-mounts """
>  		for x in myrevmounts:
> -			if not os.path.exists(mypath+x):
> +			if not os.path.exists(mypath + self.mountmap[x]):
>  				continue
> 
> -			if not ismount(mypath+x):
> +			if not ismount(mypath + self.mountmap[x]):
>  				continue
> 
>  			retval=os.system("umount "+\
> -				os.path.join(mypath,x.lstrip(os.path.sep)))
> +				os.path.join(mypath, self.mountmap[x].lstrip(os.path.sep)))
> 
>  			if retval!=0:
> -				warn("First attempt to unmount: "+mypath+x+" failed.")
> +				warn("First attempt to unmount: " + mypath +
> +					self.mountmap[x] +" failed.")
>  				warn("Killing any pids still running in the chroot")
> 
>  				self.kill_chroot_pids()
> 
> -				retval2=os.system("umount "+mypath+x)
> +				retval2=os.system("umount " + mypath + self.mountmap[x])
>  				if retval2!=0:
>  					ouch=1
> -					warn("Couldn't umount bind mount: "+mypath+x)
> +					warn("Couldn't umount bind mount: " + mypath + 
self.mountmap[x])
> 
>  			if "SNAPCACHE" in self.settings and x == "/usr/portage":
>  				try:
> @@ -1118,9 +1118,9 @@ class generic_stage_target(generic_target):
>  				"Could not replace /etc/hosts",env=self.env)
> 
>  		""" Remove our overlay """
> -		if os.path.exists(self.settings["chroot_path"]+"/usr/local/portage"):
> -			cmd("rm -rf "+self.settings["chroot_path"]+"/usr/local/portage",\
> -				"Could not remove /usr/local/portage",env=self.env)
> +		if os.path.exists(self.settings["chroot_path"] +
> self.settings["local_overlay"]): +			cmd("rm -rf " +
> self.settings["chroot_path"] + self.settings["local_overlay"], +				
"Could
> not remove " + self.settings["local_overlay"], env=self.env) cmd("sed -i
> '/^PORTDIR_OVERLAY/d' "+self.settings["chroot_path"]+\
> "/etc/portage/make.conf",\
>  				"Could not remove PORTDIR_OVERLAY from 
make.conf",env=self.env)

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