diff options
Diffstat (limited to 'guix/scripts/git/authenticate.scm')
| -rw-r--r-- | guix/scripts/git/authenticate.scm | 199 |
1 files changed, 167 insertions, 32 deletions
diff --git a/guix/scripts/git/authenticate.scm b/guix/scripts/git/authenticate.scm index def4879e96..e3ecb67c89 100644 --- a/guix/scripts/git/authenticate.scm +++ b/guix/scripts/git/authenticate.scm @@ -31,6 +31,7 @@ #:use-module (srfi srfi-1) #:use-module (srfi srfi-26) #:use-module (srfi srfi-37) + #:use-module (srfi srfi-71) #:use-module (ice-9 format) #:use-module (ice-9 match) #:export (guix-git-authenticate)) @@ -73,8 +74,125 @@ (alist-cons 'show-stats? #t result))))) (define %default-options - '((directory . ".") - (keyring-reference . "keyring"))) + '()) + +(define (current-branch repository) + "Return the name of the checked out branch of REPOSITORY or #f if it could +not be determined." + (and (not (repository-head-detached? repository)) + (let* ((head (repository-head repository)) + (name (reference-name head))) + (and (string-prefix? "refs/heads/" name) + (string-drop name (string-length "refs/heads/")))))) + +(define (config-value repository key) + "Return the config value associated with KEY in the 'guix.authentication' or +'guix.authentication-BRANCH' name space in REPOSITORY, or #f if no such config +was found." + (let-syntax ((false-if-git-error + (syntax-rules () + ((_ exp) + (catch 'git-error (lambda () exp) (const #f)))))) + (let* ((config (repository-config repository)) + (branch (current-branch repository))) + ;; First try the BRANCH-specific value, then the generic one.` + (or (and branch + (false-if-git-error + (config-entry-value + (config-get-entry config + (string-append "guix.authentication-" + branch "." key))))) + (false-if-git-error + (config-entry-value + (config-get-entry config + (string-append "guix.authentication." + key)))))))) + +(define (configured-introduction repository) + "Return two values: the commit and signer fingerprint (strings) as +configured in REPOSITORY. Error out if one or both were missing." + (let* ((commit (config-value repository "introduction-commit")) + (signer (config-value repository "introduction-signer"))) + (unless (and commit signer) + (leave (G_ "unknown introductory commit and signer~%"))) + (values commit signer))) + +(define (configured-keyring-reference repository) + "Return the keyring reference configured in REPOSITORY or #f if missing." + (config-value repository "keyring")) + +(define (configured? repository) + "Return true if REPOSITORY already container introduction info in its +'config' file." + (and (config-value repository "introduction-commit") + (config-value repository "introduction-signer"))) + +(define* (record-configuration repository + #:key commit signer keyring-reference) + "Record COMMIT, SIGNER, and KEYRING-REFERENCE in the 'config' file of +REPOSITORY." + (define config + (repository-config repository)) + + ;; Guile-Git < 0.7.0 lacks 'set-config-string'. + (if (module-defined? (resolve-interface '(git)) 'set-config-string) + (begin + (set-config-string config "guix.authentication.introduction-commit" + commit) + (set-config-string config "guix.authentication.introduction-signer" + signer) + (set-config-string config "guix.authentication.keyring" + keyring-reference) + (info (G_ "introduction and keyring recorded \ +in repository configuration file~%"))) + (warning (G_ "could not record introduction and keyring configuration\ + (Guile-Git too old?)~%")))) + +(define (install-hooks repository) + "Attempt to install in REPOSITORY hooks that invoke 'guix git authenticate'. +Bail out if one of these already exists." + ;; Guile-Git < 0.7.0 lacks 'repository-common-directory'. + (if (module-defined? (resolve-interface '(git)) + 'repository-common-directory) + (let () + (define directory + (repository-common-directory repository)) + + (define pre-push-hook + (in-vicinity directory "hooks/pre-push")) + + (define post-merge-hook + (in-vicinity directory "hooks/post-merge")) + + (if (or (file-exists? pre-push-hook) + (file-exists? post-merge-hook)) + (begin + (warning (G_ "not overriding pre-existing hooks '~a' and '~a'~%") + pre-push-hook post-merge-hook) + (display-hint (G_ "Consider running @command{guix git authenticate} +from your pre-push and post-merge hooks so your repository is automatically +authenticated before you push and when you pull updates."))) + (begin + (call-with-output-file pre-push-hook + (lambda (port) + (format port "#!/bin/sh +# Installed by 'guix git authenticate'. +set -e +while read local_ref local_oid remote_ref remote_oid +do + guix git authenticate --end=\"$local_oid\" +done\n") + (chmod port #o755))) + (call-with-output-file post-merge-hook + (lambda (port) + (format port "#!/bin/sh +# Installed by 'guix git authenticate'. +exec guix git authenticate\n") + (chmod port #o755))) + (info (G_ "installed hooks '~a' and '~a'~%") + pre-push-hook post-merge-hook)))) + (warning (G_ "cannot determine where to install hooks\ + (Guile-Git too old?)~%")))) (define (show-stats stats) "Display STATS, an alist containing commit signing stats as returned by @@ -158,35 +276,52 @@ commits)...~%") (progress-reporter/bar (length commits)) progress-reporter/silent)) + (define (missing-arguments) + (leave (G_ "wrong number of arguments; \ +expected COMMIT and SIGNER~%"))) + (with-error-handling (with-git-error-handling - (match (command-line-arguments options) - ((commit signer) - (let* ((directory (assoc-ref options 'directory)) - (show-stats? (assoc-ref options 'show-stats?)) - (keyring (assoc-ref options 'keyring-reference)) - (repository (repository-open directory)) - (end (match (assoc-ref options 'end-commit) - (#f (reference-target - (repository-head repository))) - (oid oid))) - (history (match (assoc-ref options 'historical-authorizations) - (#f '()) - (file (call-with-input-file file - read-authorizations)))) - (cache-key (or (assoc-ref options 'cache-key) - (repository-cache-key repository)))) - (define stats - (authenticate-repository repository (string->oid commit) - (openpgp-fingerprint* signer) - #:end end - #:keyring-reference keyring - #:historical-authorizations history - #:cache-key cache-key - #:make-reporter make-reporter)) - - (when (and show-stats? (not (null? stats))) - (show-stats stats)))) - (_ - (leave (G_ "wrong number of arguments; \ -expected COMMIT and SIGNER~%"))))))) + (let* ((show-stats? (assoc-ref options 'show-stats?)) + (repository (repository-open (or (assoc-ref options 'directory) + (repository-discover ".")))) + (commit signer (match (command-line-arguments options) + ((commit signer) + (values commit signer)) + (() + (configured-introduction repository)) + (_ + (missing-arguments)))) + (keyring (or (assoc-ref options 'keyring-reference) + (configured-keyring-reference repository) + "keyring")) + (end (match (assoc-ref options 'end-commit) + (#f (reference-target + (repository-head repository))) + (oid oid))) + (history (match (assoc-ref options 'historical-authorizations) + (#f '()) + (file (call-with-input-file file + read-authorizations)))) + (cache-key (or (assoc-ref options 'cache-key) + (repository-cache-key repository)))) + (define stats + (authenticate-repository repository (string->oid commit) + (openpgp-fingerprint* signer) + #:end end + #:keyring-reference keyring + #:historical-authorizations history + #:cache-key cache-key + #:make-reporter make-reporter)) + + (unless (configured? repository) + (record-configuration repository + #:commit commit #:signer signer + #:keyring-reference keyring) + (install-hooks repository)) + + (when (and show-stats? (not (null? stats))) + (show-stats stats)) + + (info (G_ "successfully authenticated commit ~a~%") + (oid->string end)))))) |