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| author | Ludovic Courtès <ludo@gnu.org> | 2016-09-06 20:19:21 +0200 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2016-09-06 23:22:10 +0200 |
| commit | c8c25704aeb2e5fa4feb6a86235f9565738eea99 (patch) | |
| tree | 2fd64514533485cd8b1bebf1bad851863d5756dd /guix/profiles.scm | |
| parent | dd72173455b31aeddb4a691285bd5c0702c75d34 (diff) | |
profiles: Add manifest-transaction helper procedures.
* guix/profiles.scm (manifest-transaction-install-entry)
(manifest-transaction-remove-pattern)
(manifest-transaction-null?): New procedures.
* tests/profiles.scm ("manifest-transaction-null?"): New test.
Diffstat (limited to 'guix/profiles.scm')
| -rw-r--r-- | guix/profiles.scm | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/guix/profiles.scm b/guix/profiles.scm index cd448e3f25..ac2fa051b2 100644 --- a/guix/profiles.scm +++ b/guix/profiles.scm @@ -78,6 +78,9 @@ manifest-transaction? manifest-transaction-install manifest-transaction-remove + manifest-transaction-install-entry + manifest-transaction-remove-pattern + manifest-transaction-null? manifest-perform-transaction manifest-transaction-effects @@ -383,6 +386,28 @@ no match.." (remove manifest-transaction-remove ; list of <manifest-pattern> (default '()))) +(define (manifest-transaction-install-entry entry transaction) + "Augment TRANSACTION's set of installed packages with ENTRY, a +<manifest-entry>." + (manifest-transaction + (inherit transaction) + (install + (cons entry (manifest-transaction-install transaction))))) + +(define (manifest-transaction-remove-pattern pattern transaction) + "Add PATTERN to TRANSACTION's list of packages to remove." + (manifest-transaction + (inherit transaction) + (remove + (cons pattern (manifest-transaction-remove transaction))))) + +(define (manifest-transaction-null? transaction) + "Return true if TRANSACTION has no effect---i.e., it neither installs nor +remove software." + (match transaction + (($ <manifest-transaction> () ()) #t) + (($ <manifest-transaction> _ _) #f))) + (define (manifest-transaction-effects manifest transaction) "Compute the effect of applying TRANSACTION to MANIFEST. Return 4 values: the list of packages that would be removed, installed, upgraded, or downgraded @@ -424,7 +449,7 @@ replace it." downgrade))))))) (define (manifest-perform-transaction manifest transaction) - "Perform TRANSACTION on MANIFEST and return new manifest." + "Perform TRANSACTION on MANIFEST and return the new manifest." (let ((install (manifest-transaction-install transaction)) (remove (manifest-transaction-remove transaction))) (manifest-add (manifest-remove manifest remove) |