Allow derivations with input derivations.
* guix/derivations.scm (derivation-path->output-path): New procedure.
(derivation-hash): Call `memoize'. In the fixed-output case, convert
HASH-ALGO to a string. In the other case, sort inputs in the
alphabetical order of their hex hash. For inputs with no sub-drvs,
add "out" as the sub-drv.
* guix/utils.scm (%nixpkgs-directory): New parameter.
(nixpkgs-derivation, memoize): New procedures.
* tests/derivations.scm ("build derivation with 1 source"): Remove
useless shebang.
(%coreutils): New variable.
("build derivation with coreutils"): New test.
Fix the order of environment variables in `derivation'.
* guix/derivations.scm (derivation)[env-vars-with-empty-outputs]:
Prepend new environment variables (as expected by Nix), and add them
to E.
SRFI-64: Remove use of (ice-9 syntax-case).
* srfi/srfi-64.upstream.scm [guile]: Remove use of (ice-9 syntax-case).
tests: Look up `test.drv' using `search-path'.
* tests/derivations.scm ("parse & export"): Use `search-path' to find
`test.drv'.
Test the `build-derivations' operation.
* guix/derivations.scm (derivation): Return DRV as a second value.
* tests/derivations.scm ("build derivation with 1 source"): New test.
Add the usual top-level files.
First stab at the `derivation' primitive.
* guix/store.scm (%store-prefix): New parameter.
(store-path?, derivation-path?): New procedures.
* guix/derivations.scm (write-derivation): Pass SOURCES through
`object->string'.
(compressed-hash, store-path, output-path, derivation): New
procedures.
* tests/derivations.scm (%store): New global variable.
("derivation with no inputs"): New test.
Add `bytevector->base16-string'.
* guix/utils.scm (bytevector->base16-string): New procedure.
Fix `bytevector->nix-base32-string'.
* guix/utils.scm (bytevector-quintet-ref-right,
bytevector-quintet-fold): New procedures.
(bytevector-quintet-fold-right): Add `quintet-fold' parameter; use it
instead of `bytevector-quintet-fold'.
(bytevector->base32-string): Pass BYTEVECTOR-QUINTET-FOLD as the
first parameter.
(bytevector->nix-base32-string): Pass BYTEVECTOR-QUINTET-FOLD-RIGHT as
the first parameter.
* tests/utils.scm ("sha256 & bytevector->nix-base32-string"): New test.
Move `sha256' to (guix utils).
* guix/derivations.scm (sha256): Move to...
* guix/utils.scm (sha256): ... here.
store: Raise error conditions upon protocol errors.
* guix/store.scm (&nix-error, &nix-protocol-error): New SRFI-35
condition types.
(process-stderr): Raise an error condition upon protocol errors
instead of returning to the caller. This allows the connection to be
reused for further interactions.
Add (guix utils), with `bytevector->base32-string'.
* guix/utils.scm, tests/utils.scm: New files.
Use libchop for cryptographic hashes and related.
* guix/derivations.scm (sha256): Rewrite using libchop's
`bytevector-hash'.
(derivation-hash): Add docstring.
Add unit test for derivation parsing and output.
* guix/derivations.scm: Export `read-derivation' and `write-derivation'.
* srfi/srfi-64.scm, srfi/srfi-64.upstream.scm: New files, from libchop.
* tests/derivations.scm, tests/test.drv: New files.
Split (guix) in (guix store) and (guix derivations).
* guix.scm: Move contents to other files. Just aggregate these.
* guix/derivations.scm, guix/store.scm: New files.