5 commits

Author	SHA1	Message	Date
Shea Levy	553e1b16f0	replace-dependency: Eelco has ruled, lowerCamelCase > dash-case :(	2013-01-13 11:15:01 -05:00
Shea Levy	96a834d42a	replace-dependency: Better function names	2013-01-11 16:16:20 -05:00
Shea Levy	5dd1b8f204	replace-dependency: Don't strictly require that drv, old-dependency, and new-dependency be derivations	2013-01-11 16:13:58 -05:00
Shea Levy	779c74f795	Remove some artifacts of a failed attempt from replace-dependency	2013-01-11 16:09:07 -05:00
Shea Levy	d1662d7155	Add the replace-dependency build support function. ... The use case is to do a deep replacement of a dependency without rebuilding the entire tree. For example, suppose a security hole is found in glibc and a patch released. Ideally, you'd just rebuild everything, but that takes time, space, and CPU that you might not have, so in the mean time you could build a safe version of, say, firefox with: firefox-safe = replace-dependency { drv = firefox; old-dependency = glibc; new-dependency = patched-glibc; }; Building firefox-safe will rebuild glibc, but only do a simple copy/string replacement on all other dependencies of firefox. On my system (MBP 13" mid-2012), after a new glibc had been build building firefox took around 11 seconds. See the comments in the file for more details.	2013-01-11 14:42:09 -05:00