[PATCH] chicken-install: cache local eggs + -location option

[Mario Domenech Goulart]

Hi,

Please find attached patches to [hopefully] improve the usability of
chicken-install.

The first one
(0001-chicken-install-Cache-eggs-installed-from-local-loca.patch) adds
support for caching eggs whose sources are retrieved from local
locations.  With this change, we also get egg versions properly reported
by chicken-status.

This change allows for the seamless use of the git repositories of egg
sources:

* git://code.call-cc.org/eggs-5-all
* git://code.call-cc.org/eggs-5-latest

With this, once the sources of eggs are fetched, it's possible to use
chicken-install without any network access.

Please see the outputs below for the difference in behavior of current
master and master with the attached patch.

###
### Behavior of current master
###

  $ ~/local/chicken-master/bin/chicken-install -purge

  $ grep '^(location ' ~/local/chicken-master/share/chicken/setup.defaults 
  (location "/home/mario/src/eggs/eggs-5-latest")

  $ ~/local/chicken-master/bin/chicken-install srfi-1
  fetching srfi-1
  fetching srfi-1
  building srfi-1
     /home/mario/local/chicken-master/bin/csc -host -D compiling-extension -J 
-s -regenerate-import-libraries -setup-mode -I 
/home/mario/.cache/chicken-install/srfi-1 -C 
-I/home/mario/.cache/chicken-install/srfi-1 -O3 -d0 srfi-1.scm -o 
/home/mario/.cache/chicken-install/srfi-1/srfi-1.so
     /home/mario/local/chicken-master/bin/csc -regenerate-import-libraries -M 
-setup-mode -static -I /home/mario/.cache/chicken-install/srfi-1 
-emit-link-file /home/mario/.cache/chicken-install/srfi-1/srfi-1.link -host -D 
compiling-extension -c -unit srfi-1 -D compiling-static-extension -C 
-I/home/mario/.cache/chicken-install/srfi-1 -O3 -d0 srfi-1.scm -o 
/home/mario/.cache/chicken-install/srfi-1/srfi-1.static.o
     /home/mario/local/chicken-master/bin/csc -setup-mode -s -host -I 
/home/mario/.cache/chicken-install/srfi-1 -C 
-I/home/mario/.cache/chicken-install/srfi-1 -O3 -d0 srfi-1.import.scm -o 
/home/mario/.cache/chicken-install/srfi-1/srfi-1.import.so
  installing srfi-1

  $ ~/local/chicken-master/bin/chicken-install srfi-1
  fetching srfi-1
  building srfi-1
     /home/mario/local/chicken-master/bin/csc -host -D compiling-extension -J 
-s -regenerate-import-libraries -setup-mode -I 
/home/mario/.cache/chicken-install/srfi-1 -C 
-I/home/mario/.cache/chicken-install/srfi-1 -O3 -d0 srfi-1.scm -o 
/home/mario/.cache/chicken-install/srfi-1/srfi-1.so
     /home/mario/local/chicken-master/bin/csc -regenerate-import-libraries -M 
-setup-mode -static -I /home/mario/.cache/chicken-install/srfi-1 
-emit-link-file /home/mario/.cache/chicken-install/srfi-1/srfi-1.link -host -D 
compiling-extension -c -unit srfi-1 -D compiling-static-extension -C 
-I/home/mario/.cache/chicken-install/srfi-1 -O3 -d0 srfi-1.scm -o 
/home/mario/.cache/chicken-install/srfi-1/srfi-1.static.o
     /home/mario/local/chicken-master/bin/csc -setup-mode -s -host -I 
/home/mario/.cache/chicken-install/srfi-1 -C 
-I/home/mario/.cache/chicken-install/srfi-1 -O3 -d0 srfi-1.import.scm -o 
/home/mario/.cache/chicken-install/srfi-1/srfi-1.import.so
  installing srfi-1

  $ ~/local/chicken-master/bin/chicken-status 
  srfi-1 .................................................... version: unknown


###
### Behavior with the attached patch
###

  $ ~/local/chicken-cache/bin/chicken-install -purge

  $ grep '^(location ' ~/local/chicken-cache/share/chicken/setup.defaults 
  (location "/home/mario/src/eggs/eggs-5-latest")

  $ ~/local/chicken-cache/bin/chicken-install srfi-1
  fetching srfi-1
  building srfi-1
     /home/mario/local/chicken-cache/bin/csc -host -D compiling-extension -J -s 
-regenerate-import-libraries -setup-mode -I 
/home/mario/.cache/chicken-install/srfi-1 -C 
-I/home/mario/.cache/chicken-install/srfi-1 -O3 -d0 srfi-1.scm -o 
/home/mario/.cache/chicken-install/srfi-1/srfi-1.so
     /home/mario/local/chicken-cache/bin/csc -regenerate-import-libraries -M 
-setup-mode -static -I /home/mario/.cache/chicken-install/srfi-1 
-emit-link-file /home/mario/.cache/chicken-install/srfi-1/srfi-1.link -host -D 
compiling-extension -c -unit srfi-1 -D compiling-static-extension -C 
-I/home/mario/.cache/chicken-install/srfi-1 -O3 -d0 srfi-1.scm -o 
/home/mario/.cache/chicken-install/srfi-1/srfi-1.static.o
     /home/mario/local/chicken-cache/bin/csc -setup-mode -s -host -I 
/home/mario/.cache/chicken-install/srfi-1 -C 
-I/home/mario/.cache/chicken-install/srfi-1 -O3 -d0 srfi-1.import.scm -o 
/home/mario/.cache/chicken-install/srfi-1/srfi-1.import.so
  installing srfi-1

  $ ~/local/chicken-cache/bin/chicken-install srfi-1
  building srfi-1
  installing srfi-1

  $ ~/local/chicken-cache/bin/chicken-status
  srfi-1 ...................................................... version: 0.5.1


The second one
(0002-chicken-install-Add-location-command-line-option.patch) adds a
`-location' (short: -l) option to chicken-install, so that users can
conveniently specify a local directory with eggs sources from the
command line, without having to touch setup.defaults.

Example:

  $ chicken-install -l ~/src/eggs/eggs-5-latest this

-location takes precedence over the settings in setup.defaults and can
be specified multiple times on the command line.  This can be useful,
for example, to install eggs which are not in the official coop.
Example:

  $ chicken-install -l ~/src/eggs/eggs-5-latest -l ~/src/my-eggs 
my-unofficial-egg

This would install my-unofficial-egg without Internet access even if
it has dependencies on official eggs (also works if it has
dependencies on unnoficial eggs that can be found in ~/src/my-eggs).

All the best.
Mario
-- 
http://parenteses.org/mario

0001-chicken-install-Cache-eggs-installed-from-local-loca.patch
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0002-chicken-install-Add-location-command-line-option.patch
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