full SHA is the default - but prints out the subset

NEWS.md

@@ -1,6 +1,13 @@
 
 # development version
 
+* The `source` column of the output data frame of `package_info()` (also
+  part of `session_info()`), now contains the full SHA for packages installed
+  from GitHub, instead of only the first seven characters. This makes it
+  easier to use the SHA programmatically. Note that this does not affect
+  formatting and printing, which still use the abbreviated SHA.
+  (@muschellij2, #61).
+
 * RStudio Package Manager (RSPM) and other repository sources are
   now shown in the `source` column, if they set the `Repository`
   field in `DESCRIPTION`.

R/package-info.R

@@ -114,7 +114,7 @@ pkg_source <- function(desc) {
     str <- paste0("Github (",
                   desc$GithubUsername, "/",
                   desc$GithubRepo, "@",
-                  substr(desc$GithubSHA1, 1, 7), ")")
+                  desc$GithubSHA1, ")")
   } else if (!is.null(desc$RemoteType) && desc$RemoteType == "standard") {
     if (!is.null(desc$Repository) && desc$Repository == "CRAN") {
       pkg_source_cran(desc)
@@ -144,7 +144,7 @@ pkg_source <- function(desc) {
     }
 
     if (!is.null(desc$RemoteSha)) {
-      sha <- paste0("@", substr(desc$RemoteSha, 1, 7))
+      sha <- paste0("@", desc$RemoteSha)
     } else {
       sha <- NULL
     }
@@ -220,6 +220,10 @@ pkg_md5_disk <- function(pkgdir) {
   order_by_name(structure(unname(md5_files), names = tolower(dll_files)))
 }
 
+abbrev_long_sha <- function(x) {
+  sub("([0-9a-f]{7})[0-9a-f]{33}", "\\1", x)
+}
+
 #' @export
 
 format.packages_info <- function(x, ...) {
@@ -233,7 +237,7 @@ format.packages_info <- function(x, ...) {
     version      = ifelse(unloaded, x$ondiskversion, x$loadedversion),
     "date (UTC)" = x$date,
     lib          = paste0("[", flib(x$library), "]"),
-    source       = x$source,
+    source       = abbrev_long_sha(x$source),
     stringsAsFactors = FALSE,
     check.names = FALSE
   )

tests/testthat/test-package-info.R

@@ -51,7 +51,7 @@ test_that("pkg_source", {
 
   expect_identical(
     pkg_source(descs$debugme),
-    "Github (gaborcsardi/debugme@df8295a)"
+    "Github (gaborcsardi/debugme@df8295a75f8e26bec90386beb1c82b529427029f)"
   )
 
   expect_identical(pkg_source(descs$curl), "CRAN (R 3.3.3)")